Bibliografias temáticas / Local desorption

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Literatura científica selecionada sobre o tema "Local desorption"

Autor: Grafiati

Publicado: 31 de agosto de 2024

Última modificação: 19 de julho de 2025

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Artigos de revistas sobre o assunto "Local desorption"

Barbero, Giovanni, Antonio M. Scarfone, and Luiz R. Evangelista. "The Kinetics of Sorption–Desorption Phenomena: Local and Non-Local Kinetic Equations." Molecules 27, no. 21 (2022): 7601. http://dx.doi.org/10.3390/molecules27217601.

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The kinetics of adsorption phenomena are investigated in terms of local and non-local kinetic equations of the Langmuir type. The sample is assumed in the shape of a slab, limited by two homogeneous planar-parallel surfaces, in such a manner that the problem can be considered one-dimensional. The local kinetic equations in time are analyzed when both saturation and non-saturation regimes are considered. These effects result from an extra dependence of the adsorption coefficient on the density of adsorbed particles, which implies the consideration of nonlinear balance equations. Non-local kinet

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Shen, Maoliang, Zhonggang Huo, Longyong Shu, Qixian Li, Pengxin Zhang, and Weihua Wang. "The Pore Structure Multifractal Evolution of Vibration-Affected Tectonic Coal and the Gas Diffusion Response Characteristics." Processes 12, no. 8 (2024): 1701. http://dx.doi.org/10.3390/pr12081701.

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Vibrations caused by downhole operations often induce coal and gas outburst accidents in tectonic zone coal seams. To clarify how vibration affects the pore structure, gas desorption, and diffusion capacity of tectonic coal, isothermal adsorption-desorption experiments under different vibration frequencies were carried out. In this study, high-pressure mercury intrusion experiments and low-pressure liquid nitrogen adsorption experiments were conducted to determine the pore structures of tectonic coal before and after vibration. The pore distribution of vibration-affected tectonic coal, includi

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Delfino, Francesco, Carles Ros, Sidney M. Palardonio, et al. "Multi-methodological analysis of hydrogen desorption from graphene." Carbon 227 (June 30, 2024): 119211. https://doi.org/10.1016/j.carbon.2024.119211.

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Chemisorption of hydrogen on graphene has been extensively investigated in last decades, but the reported values of over several eV, depending on different factors, such as the local structural environment, substrates or previously bound hydrogen. In this work, we combine Temperature-Programmed Desorption experiments with simulations using empirical reactive force fields and Density Functional Theory calculations. We observe that desorption occurs through processes with different activation energies, which we are able to identify by analyzing simulation data and post-processing exper

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Seyedvakili, Farnaz, and Mohammad Samipoorgiri. "Thermo-kinetic investigation of heavy metal ions adsorption onto lignin considering coupled adsorption–desorption mechanisms: Modeling and experimental validation." International Journal of Modeling, Simulation, and Scientific Computing 09, no. 02 (2018): 1850014. http://dx.doi.org/10.1142/s1793962318500149.

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A coupled adsorption–desorption thermo-kinetic model is developed incorporating both adsorption and desorption reactions. A local pseudo-equilibrium condition at the interface of adsorbent and adsorbate bulk phases was used as isotherm equation which can even be applied for multi-pollutants scenarios. The developed model is then validated using collected experimental data of heavy metal ions (Pb, Cu, Cd, Zn, and Ni). Comparisons were made for a number of isotherm and kinetic models to examine the performance of the proposed model. The developed model revealed desirable accuracy and superiority

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Xia, Qibin, Zhong Li, Hongxia Xi, and Kefeng Xu. "Activation Energy for Dibenzofuran Desorption from Fe3+/TiO2 and Ce3+/TiO2 Photocatalysts Coated onto Glass Fibres." Adsorption Science & Technology 23, no. 5 (2005): 357–66. http://dx.doi.org/10.1260/026361705774355469.

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In this work, TiO2, Fe3+/TiO2 and Ce3+/TiO2 photocatalytic films were respectively immobilized on glass fibres via the sol—gel technique to prepare supported photocatalysts. Temperature programmed desorption (TPD) experiments were conducted to measure the TPD curves for the removal of dibenzofuran from these photocatalysts, from which the activation energy for dibenzofuran desorption from the photocatalyst surfaces was estimated. The results showed that the activation energies for dibenzofuran desorption from the photocatalysts TiO2, Ce3+/TiO2 and Fe3+/TiO2 coated separately onto the glass fib

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Mori, G., M. Lazzarino, D. Ercolani, L. Sorba, S. Heun, and A. Locatelli. "Desorption dynamics of oxide nanostructures fabricated by local anodic oxidation nanolithography." Journal of Applied Physics 97, no. 11 (2005): 114324. http://dx.doi.org/10.1063/1.1923165.

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Rosa, Luis G., P. A. Jacobson, and P. A. Dowben. "Evidence for an Influence of Local Dipole Excitations in Thermal Desorption." Journal of Physical Chemistry B 110, no. 15 (2006): 7944–50. http://dx.doi.org/10.1021/jp054929n.

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Zavorotynska, O., I. Saldan, S. Hino, T. D. Humphries, S. Deledda та B. C. Hauback. "Hydrogen cycling in γ-Mg(BH4)2 with cobalt-based additives". Journal of Materials Chemistry A 3, № 12 (2015): 6592–602. http://dx.doi.org/10.1039/c5ta00511f.

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Hydrogen desorption and absorption properties of magnesium borohydride (Mg(BH<sub>4</sub>)<sub>2</sub>) were studied for three cycles. Effect of cobalt additives and their local structure upon cycling were investigated in detail.

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Бернацкий, Дмитрий Петрович, and Виктор Георгиевич Павлов. "FIELD DESORPTION MICROSCOPY OF CARBON-COATED FIELD ELECTRON EMITTERS." Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials, no. 13 (December 23, 2021): 25–31. http://dx.doi.org/10.26456/pcascnn/2021.13.025.

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Полевые электронные эмиттеры в форме металлического острия с пленкой углерода на поверхности обладают рядом перспективных эксплуатационных свойств. Характеристики эмиттера зависят от фазового состава, толщины и однородности пленки. Определение параметров пленок толщиной в один или несколько моноатомных слоев представляет определённые трудности. В данной работе образование и характеристики углеродных наноструктур на поверхности полевых эмиттеров из иридия и рения исследуются с помощью полевой десорбционной микроскопии непрерывного режима. На полевых десорбционных изображениях области углеродных

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Sonobe, Satoshi, Yosuke Shibata, Yusuke Asakuma, Anita Hyde, Cuong Nguyen, and Chi Phan. "A dimensionless number for microwave non-equilibrium local heating through surfactant desorption." Colloids and Surfaces A: Physicochemical and Engineering Aspects 591 (April 2020): 124560. http://dx.doi.org/10.1016/j.colsurfa.2020.124560.

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Mais fontes

Teses / dissertações sobre o assunto "Local desorption"

Sato, K. "Local Molecular Structures Induced by Water Adsorption/Desorption in Smectite Minerals." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35185.

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Positronium (Ps) annihilation spectroscopy and thermogravimetry and differential thermal analysis (TG-DTA) were conducted for synthetic smectite clay minerals to investigate local molecular structures induced by water adsorption and desorption. The TG curves indicate the weight loss of ~ 3.5 wt %, ~ 2.5 wt %, and ~ 2.0 wt % for saponite, hectorite, and stevensite due to dehydration, in accordance with DTA endothermic peaks around 332 K, 350 K, and 345 K. It is found based on the results of Ps lifetime spectroscopy that the presence of angstrom-scale open space is sensitively dependent on

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Denis, Julien. "Dynamic modelling of local fuel desorption and retention in the wall of nuclear fusion reactors for auto-consistent plasma-wall interaction simulations." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0682.

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Dans les réacteurs à fusion nucléaire, un échange constant de particules se développe entre le plasma et la paroi. Ce phénomène, appelé recyclage, présente un intérêt crucial pour ces réacteurs car, une fois le plasma établi, le recyclage représente la principale source de particules pour le plasma. Une connaissance complète du recyclage est donc essentielle pour assurer un contrôle fiable de la densité plasma ainsi qu'une performance optimale du réacteur. Cependant, les études in-situ du recyclage demeurent complexes. La modélisation numérique peut assister dans la compréhension de ce phénomè

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Duportal, Malo. "Impact de la concentration en hydrogène sur les processus de dissolution et de passivation d’un acier inoxydable austénitique." Thesis, La Rochelle, 2020. http://www.theses.fr/2020LAROS024.

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De nombreux phénomènes sont susceptibles d’occasionner l’adsorption puis l’absorption d’hydrogène à la surface d’un matériau, modifiant ainsi ses propriétés intrinsèques de cœur comme de surface. En particulier, l’hydrogène introduit peut impacter les processus de corrosion, sujet encore que peu exploré et qui reste à interroger. Dans ce cadre, le présent travail a pour objet d’évaluer l’impact de l’absorption d’hydrogène sur les mécanismes de dissolution et passivation d’un acier inoxydable austénitique AISI 316L. Dans un premier temps, une caractérisation fine de la distribution d’hydrogène

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Vega, Marlo. "Étude expérimentale et théorique des effets photo-thermiques ultra-rapides dans des réseaux de nanoparticules - application au contrôle local de la chimie de surface." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST081.

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L'excitation de nanoparticules métalliques par des impulsions delumière ultra-brèves génère des effets photo-thermiques localisés capables d'altérer leurchimie de surface. Ce travail de recherche a pour objectif d'étudier et d'utiliser ceseffets dans le but de contrôler localement la distribution de molécules d'intérêt sur lesnanoparticules. Dans un premier temps, l'utilisation conjointe de mesures despectroscopie pompe-sonde et d'un modèle numérique thermo-optique ayant un nombreminimum de paramètres libres ont permis de mettre en évidence l'hétérogénéité deseffets photo-thermiques se produis

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Bohra, Lalit Kumar. "Analysis of Binary Fluid Heat and Mass Transfer in Ammonia-Water Absorption." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19780.

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An investigation of binary fluid heat and mass transfer in ammonia-water absorption was conducted. Experiments were conducted on a horizontal-tube falling-film absorber consisting of four columns of six 9.5 mm (3/8 in) nominal OD, 0.292 m (11.5 in) long tubes, installed in an absorption heat pump. Measurements were recorded at both system and local levels within the absorber for a wide range of operating conditions (nominally, desorber solution outlet concentrations of 5 - 40% for three nominal absorber pressures of 150, 345 and 500 kPa, for solution flow rates of 0.019 - 0.034 kg/s.). Loca

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Livros sobre o assunto "Local desorption"

Riley, Peter. The role of the microbiology laboratory in antimicrobial stewardship. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780198758792.003.0010.

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Microbiology laboratories play an important role in antimicrobial stewardship at the level of individual patients and the population as a whole. When empiric therapy has been started, rapid results can lead to earlier targeted treatment. Accumulated results of susceptibility tests can be analysed and used to generate local or national guidelines on empiric treatment and prophylaxis. Several methods can be used to determine microbial identity and antimicrobial susceptibility, including traditional culture-based methods and newer molecular methods such as matrix-assisted laser desorption ionizat

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Capítulos de livros sobre o assunto "Local desorption"

P. Smith, Daniel, and Nathaniel T. Smith. "Solanum tuberosum Cultivation Using Nitrogen Recovered from Local Wastewater." In Solanum tuberosum - a Promising Crop for Starvation Problem [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98554.

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This chapter presents an approach to recover nitrogen from human waste-water at local-scale for cultivation of Solanum tuberosum (potato) as food crop. Nitrogen capture is by ion exchange of ammonium (NH4+) onto zeolite, a natural low cost mineral which is available worldwide. A coupled process is described in which wastewater ammonium is sorbed to granular zeolite, biologically extracted (desorbed), and used to support Solanum tuberosum growth in fill-and-drain or irrigation cultivation. The system employs separate components to optimize conditions for ammonium sorption (anaerobic ion exchange), desorption (aerobic bioextraction), and cultivation (flexible timing of water and nitrogen supply and nutrient recycle). System architecture provides a low cost and readily implemented system for highly efficient nitrogen capture and incorporation into potato tuber. The nitrogen recycle system enables sustainable local-scale intensification of Solanum tuberosum production and enhanced food security through use of a reliable local nutrient supply. Metrics are presented for per capita tuber production, land area, and productivity. A system design is presented with a path forward for demonstration and development.

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Bunker, Bruce C., and William H. Casey. "The Colloidal Chemistry of Oxides." In The Aqueous Chemistry of Oxides. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780199384259.003.0014.

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Colloids are defined as suspensions of finely divided particles in a continuous medium that do not settle rapidly and are not readily filtered. To be more specific, the International Union of Pure and Applied Chemistry defines a colloid as any material for which one or more of its three dimensions lies within the size range of 1 to 1000 nm. As the nucleation and growth of oxides from aqueous solutions almost always produces suspensions containing submicron particles (see Chapter 7), typical oxide suspensions fall squarely within the colloidal domain. In this book, we consider colloidal particles to represent oxides or hydroxides that are small enough to stay in aqueous suspensions for more than a few hours, yet are larger and lacking in the specific molecular structures of typical hydrolysis products (see Chapter 5). Given the density range of most oxides (from around 2−10 g/cm3), the sizes of most colloidal oxides fall within the limits of the International Union of Pure and Applied Chemistry (see Section 8.4.5). Colloidal oxide particles suspended in water represent a complex chemical environment. At the molecular level, protons, ions, small molecules, and polymeric species interact with particle surfaces to create charged surface sites and promote adsorption and desorption phenomena (see Chapter 6). These modified surfaces perturb the adjacent liquid, creating ordered solvent layers and strong concentration gradients in ions and other dissolved species. These interfacial phenomena generate a range of forces called interaction potentials. Such forces determine whether particles repel each other (leading to stable suspensions) or are attracted to one another, resulting in agglomeration and sedimentation phenomena. The length scales of those components of the oxide–water interface that influence the interaction potentials to be discussed in this chapter are introduced in Figure 8.1. At the subatomic level, the correlated polarization of electron clouds gives rise to dispersion forces described by quantum mechanics that contribute to van der Waals interactions. At the atomic level, the inherent charge on each exposed oxygen anion that terminates the oxide surface is controlled by local chemical bonds to adjacent cations (see Chapter 6).

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Trabalhos de conferências sobre o assunto "Local desorption"

Lafouresse, Manon Chloé, Marie-Laetitia de Bonfils-Lahovary, Cédric Charvillat, Lydia Laffont, and Christine Blanc. "Role of Hydrogen in Intergranular Corrosion of 2024 Aluminum Alloy: an SKPFM Study." In CORROSION 2017. NACE International, 2017. https://doi.org/10.5006/c2017-09464.

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Abstract This work aims at determining the influence of hydrogen on the corrosion damage of 2024 aluminum alloy (AA 2024), a commonly used alloy in aeronautics. A powerful way to study hydrogen embrittlement at a local scale is by Scanning Kelvin Probe Force Microscopy (SKPFM). This technique by measuring the surface potential at the nanometer scale allows the detection and localization of hydrogen in the alloy. Firstly SKPFM measurements were taken on an AA 2024 alloy H-charged by cathodic charging in H2SO4. SKPFM images taken on the side perpendicular to the charging side revealed a surface

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Scully, John R., Hakan Dogan, Daoming Li, and Richard P. Gangloff. "Controlling Hydrogen Embrittlement in Ultra-High Strength Steels." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04563.

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Abstract A Fe-13Co-11Ni-3Cr-1Mo-0.2C steel alloy, processed for ultra-high strength and fracture toughness, exhibits three distinct hydrogen trap states in a complex precipitation hardened martensitic microstructure and is susceptible to severe hydrogen embrittlement (HE) at threshold stress intensity levels as low as 20 MPa√m. The causes of HE susceptibility include very high crack-tip tensile stresses and a reservoir of diffusible hydrogen that is trapped reversibly with a binding energy, Eb, of 11.5±0.5 kJ/mol at (Fe,Cr,Mo)2C precipitates. This reversibly trapped hydrogen repartitions to in

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Matthias, E., H. N. Nielsen, J. Reif, A. Rosén, and E. Westin. "Multiphoton-Induced Desorption of Positive Ions from Bariumfluoride." In Microphysics of Surfaces, Beams, and Adsorbates. Optica Publishing Group, 1987. http://dx.doi.org/10.1364/msba.1987.mc3.

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This paper is addressed to the question of surface states on the (111)-surface of BaF2, which can serve as a model for other divalent ionic crystals. The goal is to prove that surface states, which are energetically located in the middle and upper half of the bandgap, play a decisive role in the desorption process. They can either absorb single photons which results in local heating and thermal desorption or, more of interest in this context, they can resonantly enhance multiphoton absorption.

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Tonouchi, Masayoshi, and Iwao Kawayama. "Study on local oxygen absorption/desorption dynamics onto 2D materials probed by potential-sensitive THz radiation." In International Symposium on Ultrafast Phenomena and Terahertz Waves. OSA, 2016. http://dx.doi.org/10.1364/isuptw.2016.it5a.1.

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Chen, Zhen, and Tareq Shaalan. "Advancements in the Latest Development of Unconventional Reservoir Modelling." In SPE Reservoir Simulation Conference. SPE, 2025. https://doi.org/10.2118/223833-ms.

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Abstract Natural gas plays a crucial part in a successful energy transition. As a result, efforts are underway to further explore and develop the Middle East's unconventional resources to meet rising regional and international energy needs. GigaPOWERS, an in-house, highly scalable reservoir simulator, has seen extensive use in both field development and reserve estimation. Its mathematical structure and parallel computational approaches have proven effective when applied to simulations involving unconventional reservoir systems. This paper presents some recent developments in GigaPOWERS aimed

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Cao, Jiming, and Richard N. Christensen. "Modeling an Integral Dual Solar/Gas Fired Generator for a Water-Lithium Bromide Absorption Chiller." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0823.

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Abstract This paper presents a design process for a dual solar/gas fired generator. A generator fired by solar energy and/or natural gas for a water-lithium bromide absorption chiller of 25 refrigeration tons (RT) was modeled. The natural gas is considered as the backup heat when the solar energy is unavailable or insufficient. The flue gas and the water-lithium bromide solution are in co-current flow, while the solar fluid and the water-lithium bromide solution are in counter-current flow. Fifty fluted tubes were installed vertically between two concentric cylindrical tubes. A solid ceramic i

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Zhang, Juntao, and Raj M. Manglik. "Numerical Investigation of Single Bubble Dynamics During Nucleate Boiling in Aqueous Surfactant Solutions." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47047.

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The dynamics of a single growing and departing bubble during nucleate boiling from a horizontal heated surface in an aqueous surfactant solution has been numerically simulated. The full Navier-Stokes equations together with the bulk transport and adsorption-desorption-controlled surfactant interfacial transport equations are solved. A PDE-based fast local level-set method is used to computationally capture the vapor-liquid interface, and the dynamic surface tension is modeled as a body force on the interface. A second-order projection method along with a third-order ENO (essentially non-oscill

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Celata, G. P., M. Cumo, S. McPhail, and G. Zummo. "Hydrodynamic Behaviour and Influence of Channel Wall Roughness and Hydrophobicity in Microchannels." In ASME 2004 2nd International Conference on Microchannels and Minichannels. ASMEDC, 2004. http://dx.doi.org/10.1115/icmm2004-2340.

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The sometimes contradictory results available for fluid flow in micropipes show that much is yet to be verified in micro fluid dynamics. In this study the influence of channel wall roughness and of channel wall roughness and of channel wall hydrophobicity on adiabatic flow in circular microchannels is investigated, varying in diameter from 70 μm to 326 μm. The hydrodynamic behaviour of water in smooth tubes down to 30 μm inner diameter (ID) is also ascertained. Within the current experimental accuracy it is found that the classical Hagen-Poiseuille law for friction factor vs. Reynolds number i

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Pakseresht, A., and A. Shahbazkhan. "The Effect of Splats Morphology and Post-Treatment on the Microstructure of Sprayed Coating." In ITSC2017, edited by A. Agarwal, G. Bolelli, A. Concustell, et al. DVS Media GmbH, 2017. http://dx.doi.org/10.31399/asm.cp.itsc2017p0879.

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Abstract In the thermal spray process, particulate materials can be melted by plasma atmosphere due to its high local temperature from 8700 °C to 15,000 °C. Therefore, the material powders turn into droplets after being melted by injection into the hot flame. Molten droplets are accelerated toward a substrate and form the splats which quickly solidify; finally, the film is formed by pile-up splats. Splat morphology and post treatment can determine the microstructure, mechanical and physical properties of the coating. In this study, BaTiO3 films were deposited onto a mirror polished stainless s

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N. Premnath, Kannan, Farzaneh Hajabdollahi, and Samuel W. J. Welch. "A Computational Approach to Study Heat Transfer Enhancement in Film Boiling due to the Addition of Surfactants." In ASME 2016 Heat Transfer Summer Conference collocated with the ASME 2016 Fluids Engineering Division Summer Meeting and the ASME 2016 14th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/ht2016-1003.

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Two-phase flows involving phase change are ubiquitous in a diverse range of scientific and technological applications. There has been great recent interest in the enhancement of boiling heat transfer processes by means of additives such as surfactants. Surfactants can influence boiling through convection currents in the bulk fluids as a result of changes in the surface tension caused by local surfactant concentration due their adsorption/desorption from the bulk regions. This can result in changes in bubble release patterns and higher heat transfer rates if such changes lead to higher rate of

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