Relevant bibliographies by topics / Gas partition

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Gas partition'

Author: Grafiati
Published: 4 June 2021
Last updated: 12 February 2022

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Journal articles on the topic "Gas partition"

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Dijkstra, G., J. G. Keppler, and J. A. Schols. "Gas-liquid partition chromatography." Recueil des Travaux Chimiques des Pays-Bas 74, no. 7 (September 2, 2010): 805–12. http://dx.doi.org/10.1002/recl.19550740705.

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Rosenthal, M. S., and R. J. Nickles. "Selected noble-gas partition coefficients." Physics in Medicine and Biology 30, no. 9 (September 1, 1985): 945–50. http://dx.doi.org/10.1088/0031-9155/30/9/006.

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Cho, Kyung Hyun, and Chaiho Rim. "Partition function of anyon gas." Physical Review Letters 68, no. 11 (March 16, 1992): 1621–24. http://dx.doi.org/10.1103/physrevlett.68.1621.

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Kováts, Ervin sz, and Richárd Kresz. "Wrong gas/liquid partition data by gas chromatography." Journal of Chromatography A 1113, no. 1-2 (April 2006): 206–19. http://dx.doi.org/10.1016/j.chroma.2006.01.123.

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Lemmens, L. F., F. Brosens, and J. T. Devreese. "Partition function of a spinor gas." Physical Review E 61, no. 4 (April 1, 2000): 3358–65. http://dx.doi.org/10.1103/physreve.61.3358.

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Elyutin, Pavel V., Vladimir I. Baranov, Elena D. Belega, and Dmitrii N. Trubnikov. "Partition Function of Noble Gas Trimers." Mendeleev Communications 3, no. 4 (January 1993): 161–63. http://dx.doi.org/10.1070/mc1993v003n04abeh000269.

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Castells, Reynaldo César. "Determination of gas–liquid partition coefficients by gas chromatography." Journal of Chromatography A 1037, no. 1-2 (May 2004): 223–31. http://dx.doi.org/10.1016/j.chroma.2003.12.019.

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Weckwerth, Jeff D., Peter W. Carr, Mark F. Vitha, and Asad Nasehzadeh. "A Comparison of Gas−Hexadecane and Gas−Apolane Partition Coefficients." Analytical Chemistry 70, no. 17 (September 1998): 3712–16. http://dx.doi.org/10.1021/ac971370h.

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KHOTIMAH, SITI NURUL, IDAM ARIF, and THE HOUW LIONG. "LATTICE-GAS AUTOMATA FOR THE PROBLEM OF KINETIC THEORY OF GAS DURING FREE EXPANSION." International Journal of Modern Physics C 13, no. 08 (October 2002): 1033–45. http://dx.doi.org/10.1142/s0129183102003772.

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The lattice-gas method has been applied to solve the problem of kinetic theory of gas in the Gay–Lussac–Joule experiment. Numerical experiments for a two-dimensional gas were carried out to determine the number of molecules in one vessel (Nr), the ratio between the mean square values of the components of molecule velocity [Formula: see text], and the change in internal energy (ΔU) as a function of time during free expansion. These experiments were repeated for different sizes of an aperture in the partition between the two vessels. After puncturing the partition, the curve for the particle number in one vessel shows a damped oscillation for about half of the total number. The oscillations do not vanish after a sampling over different initial configurations. The system is in nonequilibrium due to the pressure equilibration, and here the flow is actually compressible. The equilibration time (in time steps) decreases with decreased size of aperture in the partition. For very small apertures (equal or less than [Formula: see text] lattice units), the number of molecules in one vessel changes with time in a smooth way until it reaches half of the total number; their curves obey the analytical solution for quasi-static processes. The calculations on [Formula: see text] and ΔU also support the results that the equilibration time decreases with decreased size of aperture in the partition.
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Amelino-Camelia, G., and Long Hua. "Comment on ‘‘Partition function of anyon gas’’." Physical Review Letters 69, no. 19 (November 9, 1992): 2875–76. http://dx.doi.org/10.1103/physrevlett.69.2875.

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Dissertations / Theses on the topic "Gas partition"

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Jelkina, Albertsson Galina. "Investigations of Stabilization of Cr in Spinel Phase in Chromium-Containing Slags." Licentiate thesis, KTH, Materialens processvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-50709.

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The influence of basicity, heat treatment as well as different oxygen partial pressures on the phase relationships in the CaO-MgO-SiO2-Cr2O3 slags was studied with a view to control the precipitation of Cr-spinel in the slag phase. The equilibrium phases in CaO-MgO-SiO2-Cr2O3 slag system in the range on 1673-1873 K have been investigated under low oxygen partial pressure as well as in as air atmosphere. In low oxygen partial pressure experiments, a suitable mixture of CO and CO2 was used to control the oxygen partial pressure. The oxygen partial pressure was kept at 10-4 Pa. The Cr2O3 and MgO contents in the slag were fixed to be 6 and 8wt% respectively. The basicity (CaO/ SiO2) of the slag was varied in the range 1.0-2.0. Gas/slag equilibrium technique was adopted to synthesize the slag at a suitable temperature above the liquidus point. One heat treatment procedure is that the samples were heated to and soaked at 1873 K for 24h in order to achieve the equilibrium state and subsequently quenched in water. The other is that the samples were heated to and soaked at 1873 K for 24h, then slow cooled to 1673 K and soaked at this temperature for additional 24h in order to achieve the equilibrium state at lower temperature before quenching in water. The chromium distribution and phase compositions in the quenched slag were studied using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction techniques (XRD). FACTsage software was used for the phase equilibrium calculations. The experimental results obtained from the present work are compared with the calculation results from FACTsage software as well as with results from samples directly quenched after soaking at 1873K. It is found that the spinel formation at 1873 K in air atmosphere is favored in the slag basicity range of 1.0 to 1.6. The size of spinel crystals increased drastically after slow cooling followed by annealing compared to samples being quenched after soaking at 1873 K. The amount of foreign elements dissolved in the spinel phase, and matrix phases decreased after slow cooling followed by annealing at lower temperature, resulting in purer phases with less defects. It was found that the amount of foreign elements in the spinel phase, and other phases decreased after soaking at very low PO2. The size of the spinel crystals was found to be larger in samples with low basicity. Spinel phase precipitation has improved in the samples with higher basicities compared to the results obtained in air.
QC 20111208
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Khalfalla, Hamza Abdulmagid. "Modelling and optimisation of oxidative desulphurization process for model sulphur compounds and heavy gas oil : determination of rate of reaction and partition coefficient via pilot plant experiment : modelling of oxidation and solvent extraction processes : heat integration of oxidation process : economic evaluation of the total process." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4247.

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Heightened concerns for cleaner air and increasingly more stringent regulations on sulphur content in transportation fuels will make desulphurization more and more important. The sulphur problem is becoming more serious in general, particularly for diesel fuels as the regulated sulphur content is getting an order of magnitude lower, while the sulphur contents of crude oils are becoming higher. This thesis aimed to develop a desulphurisation process (based on oxidation followed by extraction) with high efficiency, selectivity and minimum energy consumption leading to minimum environmental impact via laboratory batch experiments, mathematical modelling and optimisation. Deep desulphurization of model sulphur compounds (di-n-butyl sulphide, dimethyl sulfoxide and dibenzothiophene) and heavy gas oils (HGO) derived from Libyan crude oil were conducted. A series of batch experiments were carried out using a small reactor operating at various temperatures (40-100 °C) with hydrogen peroxide (H2O2) as oxidant and formic acid (HCOOH) as catalyst. Kinetic models for the oxidation process are then developed based on 'total sulphur approach'. Extraction of unoxidised and oxidised gas oils was also investigated using methanol, dimethylformamide (DMF) and N-methyl pyrolidone (NMP) as solvents. For each solvent, the 'measures' such as: the partition coefficient (KP), effectiveness factor (Kf) and extractor factor (Ef) are used to select the best/effective solvent and to find the effective heavy gas oil/solvent ratios. A CSTR model is then developed for the process for evaluating viability of the large scale operation. It is noted that while the energy consumption and recovery issues could be ignored for batch experiments these could not be ignored for large scale operation. Large amount of heating is necessary even to carry out the reaction at 30-40 °C, the recovery of which is very important for maximising the profitability of operation and also to minimise environmental impact by reducing net CO2 release. Here the heat integration of the oxidation process is considered to recover most of the external energy input. However, this leads to putting a number of heat exchangers in the oxidation process requiring capital investment. Optimisation problem is formulated using gPROMS modelling tool to optimise some of the design and operating parameters (such as reaction temperature, residence time and splitter ratio) of integrated process while minimising an objective function which is a coupled function of capital and operating costs involving design and operating parameters. Two cases are studied: where (i) HGO and catalyst are fed as one feed stream and (ii) HGO and catalyst are treated as two feed streams. A liquid-liquid extraction model is then developed for the extraction of sulphur compounds from the oxidised heavy gas oil. With the experimentally determined KP multi stage liquid-liquid extraction process is modelled using gPROMS software and the process is simulated for three different solvents at different oil/solvent ratios to select the best solvent, and to obtain the best heavy gas oil to solvent ratio and number of extraction stages to reduce the sulphur content to less than 10 ppm. Finally, an integrated oxidation and extraction steps of ODS process is developed based on the batch experiments and modelling. The recovery of oxidant, catalyst and solvent are considered and preliminary economic analysis for the integrated ODS process is presented.
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Teye, Frederick David. "Continuous flash extraction of alcohols from fermentation broth." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/31418.

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A new method of in situ extraction of alcohols from fermentation broth was investigated. The extraction method exploited the latent advantages of the non-equilibrium phase interaction of the fluid system in the flash tank to effectively recover the alcohol. Carbon dioxide gas ranging from 4.2L/min to 12.6L/min was used to continuously strip 2 and 12% (v/v) ethanol solution in a fermentor with a recycle. Ethanol and water in the stripped gas was recovered by compressing and then flashing into a flash tank that was maintained at 5 to 70bar and 5 to 55oC where two immiscible phases comprising CO2-rich phase (top layer) and H2O-rich phase (bottom layer) were formed. The H2O-rich bottom layer was collected as the Bottoms. The CO2-rich phase was continuously throttled producing a condensate (Tops) as a result of the Joule-Thompson cooling effect. The total ethanol recovered from the extraction scheme was 46.0 to 80% for the fermentor containing 2% (v/v) ethanol and 57 to 89% for the fermentor containing 12% (v/v) ethanol. The concentration of ethanol in the Bottoms ranged from 8.0 to 14.9 %(v/v) for the extraction from the 2 %(v/v) ethanol solution and 40.0 to 53.8 %(v/v) for the 12% (v/v) fermentor ethanol extraction. The Bottoms concentration showed a fourfold increase compared to the feed. The ethanol concentration of the Tops were much higher with the highest at approx. 90% (v/v) ethanol, however the yields were extremely low. Compression work required ranged from 6.4 to 20.1 MJ/kg ethanol recovered from the gas stream in the case of 12% (v/v) ethanol in fermentor. The energy requirement for the 2% (v/v) extraction was 84MJ/kg recovered ethanol. The measured Joule-Thompson cooling effect for the extraction scheme was in the range of 10 to 20% the work of compressing the gas. The lowest measured throttle valve temperature was -47oC at the flash tank conditions of 70bar and 25oC. Optimization of the extraction scheme showed that increasing the temperature of the flash tank reduced the amount of ethanol recovered. Increasing the pressure of the flash tank increased the total ethanol recovered but beyond 45bar it appeared to reduce the yield. The 12.6L/min carbon dioxide flow rate favored the high pressure(70bar) extraction whiles 4.2L/min appeared to favor the low pressure(40bar) extraction. The studies showed that the extraction method could potentially be used to recover ethanol and other fermentation products.
Master of Science
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Asbach, Christof. "Development and evaluation of a highly effective gas particle partitioner with minimal effect on the gas composition." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=970791429.

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Portella, Rosilene Abreu. "Modelagem dinâmica de separador bifásico com alimentação por escoamento em regime de golfadas." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=773.

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Petróleo Brasileiro S.A.
O presente trabalho aborda o comportamento da planta de processamento primário com alimentação por fluxo em padrão de golfadas. O fluxo no sistema de tubulações é descrito por um modelo de parâmetros concentrados, fornecendo as características principais necessárias para o controle da planta, e a resposta dinâmica desta pode então ser analisada. Usando a estratégia de controle tradicional verifica-se que as oscilações de fluxo são transmitidas para as vazões de saída de líquido e gás, para obter uma vazão de saída mais estável é permitida a flutuação de carga no separador dentro de uma tolerância, isto é possível reduzindo a atuação do controlador e estabelecendo um controle adicional diretamente na válvula de entrada.
The present work addresses the behavior of a primary processing plant subjected to slug flow pattern at its entrance. The flow in a pipeline system is described by a simplified concentrated parameter model, which preserves the main physical features that are important to control the plant. The dynamic response of the plant is then analyzed. Using a standard control strategy for the gas liquid separator, it is seen that the flow oscillations are transmitted to the liquid and gas outlets. In order to obtain a more stable outlet flow, the liquid level in the separator is then allowed to fluctuate within a given range, by reducing the effect of the controller constants, and establishing an additional control directly on the inlet entrance valve.
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SANDU, ROXANA IONELA. "The European Union: Voting, Turnout and Legitimacy." Doctoral thesis, Università Cattolica del Sacro Cuore, 2012. http://hdl.handle.net/10280/1429.

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Perseguendo politiche comuni per gli Stati membri, l'Unione Europea si è trasformata da unione puramente economica ad unione politica. Tuttavia, per quanto riguarda quest'ultimo aspetto, è stato fatto poco. Lo scetticismo è venuto a caratterizzare il clima politico dell'Unione Europea e l’elevata eterogeneità nei termini degli Stati membri hanno causato difficoltà nel processo decisionale. Questa tesi si concentra sulle politiche europee da tre aspetti: la legittimità, che si riferisce al sostegno politico dei cittadini, il comportamento di voto e di partecipazione dei cittadini. Una delle questioni principali della ricerca riguarda l’esistenza delle basi per la genesi di veri e propri partiti politici europei, come via d’uscita dalla crisi di legittimità dell'Unione Europea. Ci si chiede poi quali sono i principali fattori che influenzano la partecipazione alle elezioni del Parlamento Europeo, dal momento che esso è l'unica fonte diretta di legittimità. Infine, si studiano le cause del gap in affluenza per le elezioni europee e nazionali, guardando la quota di voto del partito. L'argomento principale per l’esistenza dei partiti pan-europei è quello di difendere gli stessi interessi e valori su scala europea. I risultati empirici sottolineano che la polarizzazione di classe sociale, è già presente nei primi 12 Stati membri dell'UE, e anche nei nuovi Stati membri, mentre nelle elezioni del Parlamento europeo gli elettori votano sinceramente. In conclusione: l'Europa soddisfa la base per la creazione di partiti pan-Europei che difendino vere e proprie politiche europee, mirate ai gruppi sociali che rappresentano, come una possibile soluzione per la crisi di legittimità.
By pursuing common policies for its Member States, the European Union moved from being a purely economic union, to being a political one as well. However, little has been done to tackle the latter aspect. Skepticism has come to characterize the political climate of the European Union and high heterogeneity in terms of Member States has induced difficulties in the decision-making process. This thesis focuses on the European Politics from three aspects: legitimacy, which refers to citizens’ political support, voting behavior and turnout. One of the main research questions we address is whether or not the basis for the existence of true European party politics exists, as a way out of the European Union legitimacy crisis. Then, we ask what are the main factors that influence electoral participation in the European Parliament elections since it is the only source of direct legitimacy. Lastly, we investigate what are the causes for the turnout gap across European and National elections, looking at the party vote share. The main argument for pan-European to exist is to defend the same values and interests European-wide. Empirical results point out that social class's polarization already exists in the initial 12 EU Member States, as well as later entries, while in the European Parliament elections voters cast their vote sincerely. We conclude that Europe fulfils the base requirement for the creation of true European politics, party politics and social groups' targeted-policies being a possible solution for the legitimacy crisis.
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Lin, Huei-Ya, and 林徽雅. "Development of dioxin system – emission inventory and gas/particle partition." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/32775114510818065987.

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碩士
國立中興大學
環境工程學系所
97
The source apportionment of dioxin compounds (a group of polyhalogenated compounds) is of interest because of its carcinogenicity to human and animals. Model approach can provide a quantitatively linkage between source and receptor of dioxin compounds. Nonetheless, the magnitudes of the simulated concentrations of dioxin compounds by a model are still underestimated, which was likely due to the lack of a comprehensive emission inventory. Besides, the assumptions made for simulating dioxin might not be appropriated. Therefore, this study is attempted to improve the modeling system of the Gaussian Trajectroy transfer-coefficient model (GTx) for dioxin simulation. The major improvements include an extension of an emission inventory and the introduction of a mechanism for gas/particle partition. Two stages for the emission inventory modification were performed. In the first stage, four pollution sources, including stationary sources, traffic sources, combustion of agriculture waste, and dust from exposed surface, were modeling for the comparison of the predicted concentrations of dioxin with the observations at 19 stations. Using the GTx model cooperated with gas/particle partition mechanism, the results showed that the correlation coefficient of TEQ between observation and simulation is 0.2 ± 0.2% with slightly overestimation. According to the statistical analysis, it was deduced that the amount of dust from exposed surface was affected by the precipitation and, consequently, the amount of precipitation was considered as an index for the exist dust from exposed surface. By adopting the critical value of rainfall of about 7×10-5 mm/s (0.25 mm/hr), the correlation coefficient increased up to TEQ to 0.4 ± 0.2%. Moreover, after incorporating the mechanism for gas/particle partition, the prediction of TEQ was close to the observation and the correlation coefficients of a value of 0.8 was obtained in the particle and total fingerprint matching. In the second stage, six weighted categories using OCDD as index were simulated. The results showed that the correlation coefficients of dioxin congener profiles in particle partition or gas plus particle partition were close to that mentioned in the first stage. But a great increase of correlation coefficient of dioxin congener profiles in individual gas partition reached about 0.7. The results of this study indicated that the predication efficiency of GTx model to simulate the dioxin concentration was improved with the modification of emission inventory and the addition of mechanism of gas/particle partition.
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Lien, Te-Kung, and 連德恭. "Analysis of Fungicide Residues in Fruits and Vegetables by Solid-Phase Partition Cartridges and Gas Chromatography." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/66686848111659806504.

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Abraham, M. H., W. E. Jr Acree, and Xiangli Liu. "Descriptors for adamantane and some of its derivatives." 2020. http://hdl.handle.net/10454/18402.

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Yes
Literature data on solubilities of adamantane in organic solvents have been used to obtain properties, or descriptors, of adamantane. There is much less data on substituted adamantanes but we have been able to obtain descriptors for some 40 substituted adamantanes. These descriptors can then be used to estimate a wide range of physicochemical, environmental and other properties of the adamantanes. For the first time, the water-solvent partition coefficient and the gas-solvent partition coefficient into a large range of solvents, can be estimated, the latter being equivalent to Henry's Law constants. A variety of other important properties can also be estimated. These include vapor pressures, enthalpies of vaporization and sublimation, partitions from air and from blood into biological tissues, and skin permeability from water. The descriptors themselves are not exceptional. Adamantane itself has a rather low dipolarity, zero hydrogen bond acidity and a very low hydrogen bond basicity, in common with other multicyclic aliphatic compounds. These lead to adamantane being a very hydrophobic compound, as is evident from our estimated water-octanol partition coefficient.
The full-text of this article will be released for public view at the end of the publisher embargo on 24 Dec 2021.
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Yu-ChiehKuo and 郭昱杰. "A study on the formation of dioxins, gas/particle-phase partition of dioxins in the flue gas, and their fates in different environmental media." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/98650547461713273448.

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博士
國立成功大學
環境醫學研究所
100
Polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) have been widely considered as an important hazard to environment and human. Understanding of the fate of PCDD/Fs from source to receiver would be helpful for emission control and environmental impact reduction of PCDD/Fs. This study focuses on (1) the formation of PCDD/Fs in industrial process, (2) controlling PCDD/Fs emission from the potential sources through air pollution control devices (APCD), and (3) the environmental transportation of PCDD/Fs. In recent year, owing to the strict emission regulation, PCDD/Fs emissions from waste incinerators has decreased. In this stage, the focus has shifted to iron ore sinter plant for PCDD/Fs emission. Theoretically, in process suppression of PCDD/Fs generation is the best way to reduce PCDD/Fs emission. However, the PCDD/Fs formation pathway in sintering process is still unconcluded and limits the development of suppression of PCDD/Fs generation in sintering process. Therefore, the first research subject is to study the formation of PCDD/Fs during sinter process was studied. Since the sinter raw mix, (such as iron ores, coke breeze, flux and return fine), which with chlorine, metals and other organic matters have favored de novo synthesis. Moreover, the temperature profile of sinter bed revealed that the temperature of flue gas in the windbox of the later phase of sintering process could reach 400 to 500 C, indicating that the atmosphere of the windbox could be favorable for the de novo synthesis. However, the evidences for the possible de novo synthesis of PCDD/Fs in the windbox are still limited. We took the windbox dust from a commercial sinter plant for direct measurement of ionic and chemical functional group constituents for predicting possible de novo synthesis pathways of dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). We discovered that the abundance in both KCl and NaCl may provide a favorable environment for de novo synthesis of PCDD/Fs in the WB. Al, Fe, K, Ca, and Pb were the top five contents in WB16 dusts, but the co-existence of the above five metal contents need further investigation on their roles in PCDD/F formation processes in the future. Although a low concentration of Cu was detected, it might be of importance to PCDD/Fs formation inside the WB. A total of 29 chemical compounds were identified. Among them, several oxygenated organic compound might be associated with PCDD/F formations at the beginning stage, but the roles of aromatic oxygenates on the formation of PCDD/Fs required further investigation. Finally, possible de novo synthesis pathways of PCDD/Fs were proposed based on the above findings. However, the above pathways are required further laboratory studies for validation before possible formation suppression approaches can be determined. Besides direct suppression of PCDD/Fs generation, the end-of-pipe treatment (air pollution control devices, APCDs) is widely used as a major ways to reduce PCDD/Fs emission nowadays. However, using the data obtained by current flue gas sampling methods to evaluate the PCDD/Fs removal efficiencies of installed APCDs remains potential error. The misestimating of removal efficiencies might cause the unexpected emission of PCDD/Fs into the environment. Therefore, the second part of this study was aimed at developing an approach for correcting the gas and particle partitioning of PCDD/F congeners for samples collected from the flue gas of an iron ore sinter plant. An iron ore sinter plant equipped with an electrostatic precipitator (EP) and a selective catalytic reduction (SCR) was selected. Flue gas samples were collected at EP inlet (EPi), EP outlet (EPo) and SCR outlet (SCRo). Both particle- and gas-phase PCDD/Fs were analyzed for each collected sample. PCDD/F contents in EP ashs (EPash) were also analyzed and used to correct the gas and particle partitioning of PCDD/F congeners of the collected flue gas samples. Results show that PCDD/Fs in the flue gas were dominated by the gas-phase. Before correction, the removal efficiencies for the gas- and particle-phase PCDD/Fs for EP were -58.1% and 64.3%, respectively, and SCR were 39.4% and 83.9%, respectively. The above results were conflict with the expected results for both EP and SCR indicating the need for correcting the gas and particle partitioning of PCDD/F congeners for all collected flue gas samples. After correction, the removal efficiencies become more reasonable for EP (=4.22% and 97.7%, respectively), and SCR (=54.7% and 62.0%, respectively). The above results confirm the feasibility of correcting approach developed by this study. Once PCDD/Fs as well as dioxin-like compounds have entered the atmosphere from the sources, they move from atmosphere to other environmental compartment and eventually entered the food chain. Therefore, understanding their fate in the terrestrial environment also became an important issue. In the third part of this study, the PCDD/Fs as well as dioxin-like compounds concentrations in the ambient air and their impact on vegetation and soil are investigated. Ambient air, vegetation, and soil samples were collected from the vicinity of an industrial complex. For each collected sample, the polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/F), coplanar polychlorinated biphenyls (coplanar PCB), brominated dibenzo-p-dioxins/ dibenzofurans (PBDD/F), and polybrominated diphenyl ethers (PBDE) concentrations are analyzed. Principal component analysis (PCA) is adopted to explore the relationships between the concentration of each POP type in the ambient air and those in soil and vegetation. Results showed that atmospheric PCDD/Fs, PBDD/Fs, and PBDEs are dominated by the particle phase. PCDD/Fs in vegetation and soil are contributed by gas-phase and particle-phase PCDD/Fs, respectively. For coplanar PCBs, only the gas-phase coplanar PCBs contribute to the content in vegetation and soil. For PBDD/Fs, both vegetation and soil are contributed by particle-phase PBDD/Fs. PBDEs in vegetation are contributed by both gas- and particle-phase PBDEs, while soil PBDEs are by particle-phase only. The above results are confirmed by comparing with those obtained from theoretical calculations and previous studies.
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Books on the topic "Gas partition"

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Aptaker, David. Elderly, disabled and mentally ill persons, child performers, land partition, and discovery masters: Court-certified GAL training for category I, J, N, Q, and U matters. Boston, MA: MCLE, 2004.

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Cordioli, Ricardo Luiz, and Laurent Brochard. Respiratory system compliance and resistance in the critically ill. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0074.

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Under mechanical ventilation, monitoring of respiratory mechanics is fundamental, especially in patients with abnormal mechanics. In order to appropriately set the ventilator, clinicians need to understand the relationship between pressure, volume and flow. To move air in and out the thorax, energy must be dissipated against elastic and resistive forces. Elastance is the pressure to volume ratio and necessitates an end inspiratory occlusion to measure the so-called plateau pressure. Resistance is the ratio between pressure dissipated and mean gas flow. Finally, the total positive end expiratory pressure must be measured with an end expiratory occlusion. Volume-controlled ventilation is the recommended mode to assess respiratory mechanics of a passive patient. Clinicians must be aware that both chest wall and lung participate in forces imposed by the respiratory system. An oesophageal catheter can estimate pleural pressure, and used to partition the respective role of the lung and the chest wall.
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Shelef, Nadav G. Homelands. Cornell University Press, 2020. http://dx.doi.org/10.7591/cornell/9780801453489.001.0001.

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Why are some territorial partitions accepted as the appropriate borders of a nation's homeland, whereas in other places conflict continues despite or even because of division of territory? This book develops a theory of what homelands are that acknowledges both their importance in domestic and international politics and their change over time. These changes, the book argues, are driven by domestic political competition and help explain the variation in whether partitions resolve conflict. The book also provides systematic, comparable data about the homeland status of lost territory over time that allow it to bridge the persistent gap between constructivist theories of nationalism and positivist empirical analyses of international relations.
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Book chapters on the topic "Gas partition"

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Bishop, C. T. "Separation of Carbohydrate Derivatives by Gas Liquid Partition Chromatography." In Methods of Biochemical Analysis, 1–42. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2006. http://dx.doi.org/10.1002/9780470110270.ch1.

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Lowe, H. J., and K. Hagler. "Determination of Volatile Organic Anaesthetics in Blood, Gases, Tissues and Lipids: Partition Coefficients." In Ciba Foundation Symposium - Gas Chromatography in Biology and Medicine, 86–112. Chichester, UK: John Wiley & Sons, Ltd, 2008. http://dx.doi.org/10.1002/97804707197019780700014286.ch9.

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Yamaguchi, Kazuhiro, Masaaki Mori, Akira Kawai, Kohichiro Asano, Tomoaki Takasugi, Akira Umeda, and Tetsuro Yokoyama. "Effects of SO2 and pH on Blood-Gas Partition Coefficients of Inert Gases." In Advances in Experimental Medicine and Biology, 215–24. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-8181-5_27.

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Labussière, E., S. Dubois, J. Van Milgen, and J. Noblet. "Chapter 4: Modelling gas exchanges to partition heat production between fasting, thermic effect of feeding and physical activity in farm animals." In Indirect calorimetry, 73–86. The Netherlands: Wageningen Academic Publishers, 2015. http://dx.doi.org/10.3920/978-90-8686-261-0_4.

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Alladi, Krishnaswami. "Partition Identities Involving Gaps and Weights, II." In Analytic and Elementary Number Theory, 21–37. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-4507-8_3.

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Roure, J., P. Larrañaga, and R. Sangüesa. "An Empirical Comparison Between K-Means, GAs and EDAs in Partitional Clustering." In Estimation of Distribution Algorithms, 343–60. Boston, MA: Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-1539-5_17.

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Barfusz, Oliver, Felix Hötte, Stefanie Reese, and Matthias Haupt. "Pseudo-transient 3D Conjugate Heat Transfer Simulation and Lifetime Prediction of a Rocket Combustion Chamber." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 265–78. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-53847-7_17.

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Abstract Rocket engine nozzle structures typically fail after a few engine cycles due to the extreme thermomechanical loading near the nozzle throat. In order to obtain an accurate lifetime prediction and to increase the lifetime, a detailed understanding of the thermomechanical behavior and the acting loads is indispensable. The first part is devoted to a thermally coupled simulation (conjugate heat transfer) of a fatigue experiment. The simulation contains a thermal FEM model of the fatigue specimen structure, RANS simulations of nine cooling channel flows and a Flamelet-based RANS simulation of the hot gas flow. A pseudo-transient, implicit Dirichlet–Neumann scheme is utilized for the partitioned coupling. A comparison with the experiment shows a good agreement between the nodal temperatures and their corresponding thermocouple measurements. The second part consists of the lifetime prediction of the fatigue experiment utilizing a sequentially coupled thermomechanical analysis scheme. First, a transient thermal analysis is carried out to obtain the temperature field within the fatigue specimen. Afterwards, the computed temperature serves as input for a series of quasi-static mechanical analyses, in which a viscoplastic damage model is utilized. The evolution and progression of the damage variable within the regions of interest are thoroughly discussed. A comparison between simulation and experiment shows that the results are in good agreement. The crucial failure mode (doghouse effect) is captured very well.
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Lane, Douglas A., and N. Douglas Johnson. "Gas/Particle Partition Measurements with the Gas and Particle (GAP) Sampler." In Gas and Particle Phase Measurements of Atmospheric Organic Compounds, 177–200. CRC Press, 2020. http://dx.doi.org/10.1201/9781003078340-8.

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Li, Hailong, Wenqi Qu, Zequn Yang, and Jiexia Zhao. "Trace element partition in coal combustion." In Emission and Control of Trace Elements from Coal-Derived Gas Streams, 63–103. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-08-102591-8.00003-9.

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Li, Hailong, Zequn Yang, Jianping Yang, and Yingchao Hu. "Trace element partition in coal fires." In Emission and Control of Trace Elements from Coal-Derived Gas Streams, 105–42. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-08-102591-8.00004-0.

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Conference papers on the topic "Gas partition"

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Koyama, K., C. Hong, and Y. Asako. "Effect of Partition Wall Thickness on Heat Transfer Characteristics of a Gas-to-Gas Counterflow Microchannel Heat Exchanger." In ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2009. http://dx.doi.org/10.1115/icnmm2009-82041.

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Effect of partition wall thickness on heat transfer characteristics of a two-stream counterflow gas-to-gas microchannel heat exchanger has been numerically investigated. The flow passages of the microchannel heat exchanger are plane channels of 100 μm in height and 20 mm in length. The partition wall thickness ranges from 20 μm to 200 μm. The material of the partition wall is assumed to be stainless steel. The numerical methodology is based on the Arbitrary-Lagrangian-Eulerian method. The computations were performed for a wide range of flow rate to investigate effect of partition wall thickness on heat transfer characteristics of the microchannel heat exchanger. The computational results are presented in form of temperature distributions, bulk temperatures, total temperatures, and heat flux variations along the channels. We have concluded that the partition wall thickness affects significantly heat transfer characteristics of a microchannel heat exchanger.
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Koyama, Kohei. "A Constant-Wall-Temperature Model for Prediction of Thermal Performance of Gas-to-Gas Counter-Flow and Parallel-Flow Microchannel Heat Exchangers." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58290.

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Thermal performances of gas-to-gas counter-flow and parallel-flow microchannel heat exchanger have been investigated. Working fluid used is air. Heat transfer rates of both heat exchangers are compared with those calculated by a conventional log-mean temperature difference method. The results show that the log-mean temperature difference method can be employed to a parallel-flow configuration whereas that cannot be employed to a counter-flow configuration. This study focuses on the partition wall which separates hot and cold passages of the microchannel heat exchanger. The partition wall is negligibly thin for a conventional-sized heat exchanger. In contrast, the partition wall is thick compared with channel dimensions for a microchannel heat exchanger. A model which includes the effect of the thick partition wall is proposed to predict thermal performances of the microchannel heat exchangers. The heat transfer rates obtained by the model agree well with those obtained by the experiments. Thermal performances of the counter-flow and parallel-flow microchannel heat exchangers are compared with respect to one another based on temperature of the partition wall. The comparison results show that thermal performances of the counter-flow and parallel-flow microchannel heat exchangers are identical. This is due to performance degradation induced by the thick partition wall of the counter-flow microchannel heat exchanger. This study reveals that the thick partition wall dominates thermal performance of a gas-to-gas microchannel heat exchanger.
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Wu, Donglan, Andong Xie, and Huijun Wan. "Computer simulation of partition functions For NO2 flue gas." In 2012 International Conference on Computer Science and Information Processing (CSIP). IEEE, 2012. http://dx.doi.org/10.1109/csip.2012.6308780.

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Miyahara, Shinya, Masahiro Nishimura, and Toshio Nakagiri. "Equilibrium Partition Coefficients of Cesium and Iodine Between Sodium Pool and the Inert Cover Gas." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29169.

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Equilibrium partition coefficients were experimentally measured for volatile fission products of cesium and iodine between liquid sodium pool and the inert cover gas. In the experiments, the “transpiration method” was utilized in which the saturation vapor of sodium with cesium and iodine vapor in an isothermal evaporation pot was transported by inert carrier gas and trapped by filters outside the pot. The objectives of the experiments are to: a) Obtain the equilibrium partition coefficients of cesium and iodine at high temperature between 600 and 850 deg-C, and b) Study the dependence of the partition coefficients upon the concentration in the sodium pool. From the results of previous work and this study, the following empirical equations between the partition coefficients of cesium and iodine and the sodium pool temperature could be obtained: logKd(Cs)=2173/T−1.0487(from450to850deg-C)logKd(I)=−215/T−0.271(from450to850deg-C) These equations are consistent with Castleman’s theoretical equations. The partition coefficients of cesium measured at five different points of mole concentration in the pool were almost consistent with the theoretical values and decreased with the increase in the concentration. On the other hand, the measured partition coefficients of iodine increased with the increase in the concentration in the pool and this tendency was incompatible with the theoretical consideration. The reason of this discrepancy might be attributed to the formation of Na2I2 in the cover gas.
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Nakane, Takuma, Toshihisa Osaki, Hisatoshi Mimura, Norihisa Miki, and Shoji Takeuchi. "Efficient Gas-to-Liquid Partition Using Gas-Flow Channels for Cell-Based Gaseous Odorant Detection." In 2021 21st International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers). IEEE, 2021. http://dx.doi.org/10.1109/transducers50396.2021.9495472.

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Luo, X., and Chr Day. "Transmission probability and active pumping ability of the channel with moving partition plane." In 30TH INTERNATIONAL SYMPOSIUM ON RAREFIED GAS DYNAMICS: RGD 30. Author(s), 2016. http://dx.doi.org/10.1063/1.4967693.

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Taslim, M. E., T. Li, and S. D. Spring. "Measurements of Heat Transfer Coefficients and Friction Factors in Passages Rib-Roughened on All Walls." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-355.

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A liquid crystal technique was used to measure heat transfer coefficients in twelve test sections with square and trapezoidal cross-sectional areas representing blade midchord cooling cavities in a modern gas turbine. Full-length ribs were configured on suction side as well as pressure side walls while half-length ribs were mounted on partition walls between adjacent cooling cavities. Ribs were in staggered arrangements with a nominal blockage ratio of 22% and an angle of attack to the mainstream flow, α, of 90°. Heat transfer measurements were performed on the roughened walls with full-length as well as half-length ribs. Nusselt numbers, friction factors and thermal performances of all geometries are compared. The most important conclusion of this study is that the roughening of the partition walls enhances the heat transfer coefficients on those walls but, more importantly, enhances heat transfer coefficients on the primary walls considerably.
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Koyama, K., and Y. Asako. "Heat Exchange Characteristics of a Gas-Gas Counterflow Microchannel Heat Exchanger." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67070.

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Heat exchange characteristics of a gas-gas counterflow microchannel heat exchanger have been investigated experimentally. The microchannel has a rectangular cross section with 200 μm high and 300 μm wide. Working fluid is air. Reynolds number in the hot passage ranges from 127 to 381, and that in the cold passage ranges from 25 to 381. Temperatures and pressures at inlets and outlets of the heat exchanger have been measured to obtain heat transfer rates and pressure losses. The heat exchange and the pressure loss characteristics of the tested microchannel heat exchanger are discussed. Since the partition wall of the heat exchanger is thick comparing with the microchannel dimensions, a simple heat exchange model, the wall temperature of which is constant, is proposed to predict the heat transfer rate. The predicted heat transfer rates are compared with those of the experimental results and both results agree well.
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Torrealba, V. A., and R. T. Johns. "Partition Coefficient Relations in Surfactant-Oil-Brine Systems for Improved Description of Microemulsion Phase Behavior." In SPE EOR Conference at Oil and Gas West Asia. Society of Petroleum Engineers, 2016. http://dx.doi.org/10.2118/179845-ms.

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Tochon, G., J. Chanussot, J. Gilles, M. Dalla Mura, J. M. Chang, and A. L. Bertozzi. "Gas plume detection and tracking in hyperspectral video sequences using Binary Partition Trees." In 2014 6th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS). IEEE, 2014. http://dx.doi.org/10.1109/whispers.2014.8077581.

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Reports on the topic "Gas partition"

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Wells, Aaron, Tracy Christopherson, Gerald Frost, Matthew Macander, Susan Ives, Robert McNown, and Erin Johnson. Ecological land survey and soils inventory for Katmai National Park and Preserve, 2016–2017. National Park Service, September 2021. http://dx.doi.org/10.36967/nrr-2287466.

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This study was conducted to inventory, classify, and map soils and vegetation within the ecosystems of Katmai National Park and Preserve (KATM) using an ecological land survey (ELS) approach. The ecosystem classes identified in the ELS effort were mapped across the park, using an archive of Geo-graphic Information System (GIS) and Remote Sensing (RS) datasets pertaining to land cover, topography, surficial geology, and glacial history. The description and mapping of the landform-vegetation-soil relationships identified in the ELS work provides tools to support the design and implementation of future field- and RS-based studies, facilitates further analysis and contextualization of existing data, and will help inform natural resource management decisions. We collected information on the geomorphic, topographic, hydrologic, pedologic, and vegetation characteristics of ecosystems using a dataset of 724 field plots, of which 407 were sampled by ABR, Inc.—Environmental Research and Services (ABR) staff in 2016–2017, and 317 were from existing, ancillary datasets. ABR field plots were located along transects that were selected using a gradient-direct sampling scheme (Austin and Heligers 1989) to collect data for the range of ecological conditions present within KATM, and to provide the data needed to interpret ecosystem and soils development. The field plot dataset encompassed all of the major environmental gradients and landscape histories present in KATM. Individual state-factors (e.g., soil pH, slope aspect) and other ecosystem components (e.g., geomorphic unit, vegetation species composition and structure) were measured or categorized using standard classification systems developed for Alaska. We described and analyzed the hierarchical relationships among the ecosystem components to classify 92 Plot Ecotypes (local-scale ecosystems) that best partitioned the variation in soils, vegetation, and disturbance properties observed at the field plots. From the 92 Plot Ecotypes, we developed classifications of Map Ecotypes and Disturbance Landscapes that could be mapped across the park. Additionally, using an existing surficial geology map for KATM, we developed a map of Generalized Soil Texture by aggregating similar surficial geology classes into a reduced set of classes representing the predominant soil textures in each. We then intersected the Ecotype map with the General-ized Soil Texture Map in a GIS and aggregated combinations of Map Ecotypes with similar soils to derive and map Soil Landscapes and Soil Great Groups. The classification of Great Groups captures information on the soil as a whole, as opposed to the subgroup classification which focuses on the properties of specific horizons (Soil Survey Staff 1999). Of the 724 plots included in the Ecotype analysis, sufficient soils data for classifying soil subgroups was available for 467 plots. Soils from 8 orders of soil taxonomy were encountered during the field sampling: Alfisols (<1% of the mapped area), Andisols (3%), Entisols (45%), Gelisols (<1%), Histosols (12%), Inceptisols (22%), Mollisols (<1%), and Spodosols (16%). Within these 8 Soil Orders, field plots corresponded to a total of 74 Soil Subgroups, the most common of which were Typic Cryaquents, Typic Cryorthents, Histic Cryaquepts, Vitrandic Cryorthents, and Typic Cryofluvents.
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