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Dissertations / Theses on the topic 'Air, Purification of'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 July 2025

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1

Gustafsson, Anders. "Performance monitoring of systems for air purification." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246148.

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Wastewater treatment plants (WWT P ) are often the cause of malodor. The com-pounds which are the main causes of the odor is hydrogen sulﬁde (H2S), ammonia (NH3), mercaptans (RSH) and volatile organic compounds (V OC) [1]. The odorous air can be analyzed to determine the concentration of the odorants. The odorous can also be analyzed by measuring the odor. The odor is measured, a test panel of people smells the odorous air and determines how many times greater the concentration of the odorants is compared to the odor threshold which is the concentration at which a compound or a mixture is dete

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2

PIFERI, CECILIA. "Cold plasmas for air purification and sanitation." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2023. https://hdl.handle.net/10281/402359.

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È comunemente accettato che il cambiamento climatico sia dovuto ad un effetto antropico. Gli agenti inquinati sono sicuramente responsabili del peggioramento della qualità della vita umana ed è necessario trovare una soluzione. Una importante classe di inquinati è quella dei Composti Organici Volatili (VOC). Molti di questi composti sono classificati come cancerogeni o possibili cancerogeni per le persone, oltre al fatto che possono causare danni a lungo termine sull'ambiente. Nonostante questi problemi, i VOC sono necessari nelle vernici di pareti o arredi, nei trattamenti dei tessuti e sono

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3

Yun, Ji Sub. "Purification of Indoor Air Pollutants Utilizing Hydrophobic Adsorbents." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/41613.

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Sick building syndrome (SBS) is a particular concern in places with inadequate ventilation and frequently attributed to chemical contaminants such as volatile organic compounds (VOCs)released from indoor sources that are frequently encountered in everyday life such as adhesives, carpeting, upholstery, manufactured wood products, copy machines, pesticides, cleaning agents inside buildings, plumbing vents, and painting. Furthermore, it is a major issue for modern human beings who spend most of their time indoors or must stay indoors for self-isolation due to special circumstances such as the co

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4

Zhang, Yangyang. "Modeling and Design of Photocatalytic reactors for Air Purification." Scholar Commons, 2013. http://scholarcommons.usf.edu/etd/4621.

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Photocatalysis is a promising technique for the remediation of indoor air pollution. Photocatalysis utilizes semiconductor photocatalysts (such as TiO2 or ZnO) and appropriate light to produce strong oxidizing agents (OH*) that are able to break down organic compounds and inactivate bacteria and viruses. The overall goal of the research is to develop an efficient photocatalytic reactor based on mass transfer for indoor air purification. This study has focused on the enhancement of the effectiveness of the photocatalytic process by the introduction of artificial roughness on the reactor catalys

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5

Lam, Chun-wai Ringo, and 林俊偉. "Development of photocatalytic oxidation technology for purification ofair and water." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38572382.

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6

Lam, Chun-wai Ringo. "Development of photocatalytic oxidation technology for purification of air and water." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38572382.

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7

Niu, Hejingying, and 牛何晶英. "Nitric oxide removal by wastewater bacteria in a biotrickling filter." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hub.hku.hk/bib/B50533885.

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Nitric oxide (NO) is one of the most important air pollutants in atmosphere mainly emitted from combustion exhaust gas. In this research, a biotrickling filter was designed and operated to remove this pollutant from an air stream using bacteria extracted from the sewage sludge of a municipal sewage-treatment plant. The bacteria were cultured and enriched by either petri dish’s cultivation or liquid cultivation. The adsorption capacity of the ceramic material, which was used as the packing material, was determined to be 34 g-NO/L under 37℃. However, the saturated adsorption capacity of the pac

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8

WALTER, RICHARD MARIE-CLOTILDE. "Methodes de reduction de l'allergene majeur du chat fel d i : comparaison de quatre systemes d'epuration de l'air." Strasbourg 1, 1995. http://www.theses.fr/1995STR15020.

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9

Abussaud, Basim Ahmed. "Wet air oxidation of benzene." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103362.

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Processing of petrochemical compounds produces a large amount of wastewater. This wastewater consists of toxic (hazardous) materials that can not be discharged to the environment without treatment. As restrictive environmental constraints increase, new technologies are needed to treat those toxic materials before discharging them to the environment. Wet Air Oxidation (WAO) is one of these new methods.<br>This study casts light on the effect of initial pH on the WAO of benzene at different temperatures and pressures. It was found that at pH 6, a temperature of 260°C and a partial pressure of ox

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10

Clausse, Benoît. "Adsorption/coadsorption de composés organochlorés par une faujasite Y hydrophobe/organophile dans un contexte de dépollution de l'air et de l'eau." Dijon, 1997. http://www.theses.fr/1997DIJOS006.

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L’adsorption par une faujasite Y desaluminée (Si/Al>100) du dichlorométhane (DCM), 1,2-dichloroethane (DCE), trichloroéthène et tétrachloréthène en phase gazeuse pure ou en mélange, ainsi que l'adsorption des composes DCM et DCE en solution aqueuse ont été étudiées dans un contexte de purification d'effluents gazeux ou aqueux pollués. Les résultats montrent que l'adsorption d'un composé à partir d'une solution aqueuse ou d'un mélange gazeux se réduit à un équilibre entre deux phases non miscibles, la zéolithe jouant le rôle de solvant hydrophobe. Une bonne corrélation est obtenue entre la capa

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11

Mirzaei, Ali Akbar. "Low temperature carbon monoxide oxidation using copper containing catalysts." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266493.

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12

Maudhuit, Audrey. "Purification de l’air intérieur – Élimination des micro-polluants par procédé photocatalytique." Nantes, 2010. http://www.theses.fr/2010NANT2105.

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La qualité de l'air intérieur est une des problématiques émergentes de nos populations citadines. Parmi les polluants identifiés, les composés organiques volatils (COY) sont prédominants. La photocatalyse hétérogène, dont l'efficacité a été prouvée pour l'élimination de COV, sera développée si les verrous scientifiques suivants sont levés : la compréhension des mécanismes réactionnels et l'écriture de lois maîtresses permettant le dimensionnement du procédé. Dans l'objectif de lever ces verrous, un media fibreux conçu par Saint Gobain est utilisé pour l'étude de la dégradation photocatalytique

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13

Zazueta, Ana Luis Loo. "Modeling, design and evaluation of a multi-plate photocatalytic reactor for air purification." Thesis, University of Nottingham, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.605585.

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Indoor air pollution is a persistent problem found not only in buildings but . also in transportation vehicles, aircrafts and many other confined spaces. Photocatalytic air cleaning devices, in combination with source control and ventilation appears to be a promising method to reduce volatile organic compounds (VOCs) levels, which are among the most abundant indoor air pollutants. A major challenge this technology faces, is poor catalyst illumination efficiency. In general, effective photon utilization is a critical factor in determining the economic feasibility of a particular photocatalytic

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14

Stanley, Anthony Wayne. "An investigation of the suitability of DC corona discharges for air purification systems." Thesis, Cranfield University, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304398.

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15

Гурець, Лариса Леонідівна, Лариса Леонидовна Гурец, Larysa Leonidivna Hurets та Д. В. Кривич. "Анализ пылеулавливающих аппаратов сухой и мокрой очистки". Thesis, Изд-во СумГУ, 2009. http://essuir.sumdu.edu.ua/handle/123456789/6867.

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16

Smith, Francis Lee. "Pilot-scale Development of Trickle Bed Air Biofiltration Employing Deep Biofilms, for the Purification of Air Polluted with Biodegradable VOCs." University of Cincinnati / OhioLINK, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1034206999.

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17

Alkhudhiri, Abdullah Ibrahim. "Treatment of saline solutions using air gap membrane distillation (AGMD)." Thesis, Swansea University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678440.

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18

Land, Eva Miriam. "Photocatalytic degradation of NOX, VOCs, and chloramines by TiO2 impregnated surfaces." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34857.

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Experiments were conducted to determine the photocatalytic degradation of three types of gas-phase compounds, NOX, VOCs, and chloramines, by TiO2 impregnated tiles. The oxides of nitrogen NO and NO2 (NOx) have a variety of negative impacts on human and environmental health ranging from serving as key precursors for the respiratory irritant ozone, to forming nitric acid, which is a primary component of acid rain. A flow tube reactor was designed for the experiments that allowed the UV illumination of the tiles under exposure to both NO and NO2 concentrations in simulated ambient air. The react

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19

Charalambous, Charithea. "Temperature swing adsorption process for carbon dioxide capture, purification and compression directly from atmospheric air." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/33311.

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Many reports, scientific papers, patents, and scientific news investigate the feasibility and affordability of direct carbon dioxide capture from the atmospheric air (DAC). Since carbon dioxide (CO2) is extremely diluted in the atmosphere, large volumes of air have to be handled to capture comparable amounts of CO2. Therefore, both the energy consumption and the plant size are expected to be 'prohibitive'. On the other hand, some analyses have shown that DAC is feasible and can become affordable with essential research and development. DAC has been regarded as an optional bridging or a transit

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20

Löf, Ludwig. "Evaluation of Dissolved Air Flotation for Water Purification: With Focus on Floc Characteristics and PFAS." Thesis, KTH, Kemiteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-298378.

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I detta projekt har experiment utförts med mål att förse kommunalförbundet Norrvatten med data som kan användas som underlag för beslutsfattande angående om deras fällningslinjer i vattenreningsprocessen ska köras i flotation eller sedimentering. För detta ändamål har koncentrationen av poly- och perfluorerade alkylsubstanser (PFAS) samt karaktär av agglomererade partiklar (flockar) undersökts och jämförts mellan fällningslinjer som körs i olika konfigurationer. För flockkaraktär har skapandet och stabiliteten av flockar varit av intresse, eftersom flotation har ett mer turbulent flöde där flo

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21

Ljung, Sebastian. "CFD simulation of particle matter inside an automotive car and the purification efficiency of cabin air purifier." Thesis, KTH, Hållbara byggnader, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-257682.

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The purpose of this thesis work was to study the airflow patterns and the particle distribution in a generic car cabin in order to evaluate the air quality and find how it can be improved. A 3D CAD model was created using the Solidworks software program and meshed using ICEM CFD software. The ICEM CFD software was used to generate the mesh and ANSYS FLUENT was adapted for the simulation. In total, 12 different cases were simulated by considering different inlet velocities and vent setup. The predicted results were further used to analyze the airflow and particle distribution in the entire car

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22

Dlangamandla, Cynthia. "Bioflocculant dissolved air flotation system for the reduction of suspended solids-lipids-Proteinaceous matter from poultry slaughterhouse wastewater." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2485.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2016.<br>Poultry slaughterhouse wastewater (PSW) contains organic matter that can be degraded by microorganisms. Such matter can further be used by the microbial community as a nutrient source for growth. Moreover, this type of wastewater also contains a high quantity of particulate matter, lipids and proteins, including antimicrobial compounds such as triclosan (TCS) and trichlorocarbanilide (TCC) used during cleaning and sanitising of processing facilities. Lipids and particulate matter lead to clogging of pipes

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23

Yang, Linda, and Robert Liao. "Water Purification : Research on the Energy Supply of Air Gap Membrane Distillation for Access to Clean Water." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-282905.

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Water stress is an ongoing problem in many places in the world, while the demand for clean and safe freshwater is growing due to the increasing population. In many developing countries, water supplies often are contaminated with arsenic, fluoride, etc. Therefore, it is important to realize that water scarcity and contamination issues concern only one sector but many. HVR Water Purification AB is developing a water purification prototype – ELIXIR 500 - using the air gap membrane technology and is implemented in Odisha, India, aiming to supply with 200 litre water daily. This thesis aims to esti

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24

Delduque, Thalita Pereira. "Remoção da amônia por air stripping em canais corrugados helicoidais." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2261.

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CNPQ<br>O presente trabalho propõe verificar o desempenho de um canal corrugado helicoidal aplicado na remoção de amônia, por meio do processo air stripping. O sist p ssui iâ tr i t r 4’’(≈100 m) e 10m de comprimento disposto de forma helicoidal. Avaliou-se a influência das condições operacionais como: vazão de ar (1000 L min-1 a 3000 L min-1), vazão do líquido (0,2 L min-1 a 1,0 L min-1), concentração de nitrogênio, pH (9,0 a 12,0) e declividade do canal (5% a 20%) na remoção da amônia. Foram realizados ensaios de caracterização hidrodinâmica do sistema com ajuste dos modelos uni-paramétricos

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25

Ben, Jaber Mouna. "Biofiltration d'H2S - Cas du traitement aérobie de l'air et de la purification anoxique de biogaz." Rennes, Ecole nationale supérieure de chimie, 2016. http://www.theses.fr/2016ENCR0036.

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26

Randall, Andrew A. "Operational and exocellular biopolymer characteristics of sludges generated from an air products and a convential activated sludge system." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/43890.

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This study compared the sludge characteristics of a lab-scale Air Products (A/O) and a conventional activated sludge system. The sludges were analyzed for operational properties and the exocellular biopolymers of each sludge was characterized. Operational analysis mainly consisted of measurements of settling (SVI) and dewatering (specific resistance, CST) parameters at each sludge age. Biopolymers were measured using pH extraction followed by gel filtration and subsequent analysis for carbohydrate and protein concentrations. The results showed a high degree of similarity between the t

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27

Staudinger, Jeff. "Evaluation of mass transfer correlations for packed column air stripping of volatile organic contaminants from water supplies." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/101153.

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The application of packed column air stripping systems to the removal of volatile organic contaminants (VOCs) from drinking water sources was investigated. The crucial element for the design of such systems exists in obtaining accurate predictions of mass transfer rates. The first phase of this study evaluated three semi-empirical correlations available for predicting packed column mass transfer rates. From this initial screening, the Onda model was selected for further investigation. A test data base was established from water treatment pilot study results reported in the literature. Ten sepa

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28

Kieffer, Daniel W. "Feasibility of recycling air conditioner condensate for use as process water for a manufacturing facility." Oklahoma City : [s.n.], 2008.

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29

Guz, Ricardo. "Associação de sistema biológico do tipo lodo ativado com reatores air lift e fotocatálise heterogênea com TiO2 para a remediação de efluente oriundo da produção industrial de TNT." Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/1768.

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Na etapa de purificação do trinitrotolueno (TNT) produzido nas indústrias, são realizadas duas lavagens ao final do processo. A primeira lavagem é realizada com água vaporizada, na qual origina-se o primeiro efluente, denominado água amarela, em seguida, é realizada uma segunda lavagem com a utilização de sulfito de sódio (Na2SO3), gerando o segundo efluente água vermelha. O presente trabalho teve como objetivo estudar os efeitos individuais, bem como, a associação da fotocatálise heterogênea utilizando TiO2 e tratamento biológico em reator air lift utilizando lodo ativado (biomassa bacteriana

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30

Khunsupat, Ratayakorn. "Poly(allylamine) and derivatives for co2 capture from flue gas or ultra dilute gas streams such as ambient air." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44909.

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Polymers rich in primary amine groups are proposed to be effective adsorbents for the reversible adsorption of CO2 from moderately dilute gas streams (10% CO2) and ultra-dilute gas streams (e.g. ambient air, 400 ppm CO2), with their performance under ultra-dilute conditions being competitive with or exceeding the state-of-the-art adsorbents based on supported poly(ethyleneimine) (PEI). The CO2 adsorption capacity (mmol CO2/g sorbent) and amine efficiency (mmol CO2/mmol amine) of linear poly(allylamine) (PAA), cross-linked poly(allylamine) prepared by post-polymerization crosslinking with epic

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Alberte, Tania Maria. "Estudo do tratamento de aguas residuarias por lodo ativado em reator "air-lift" de tubos concentricos." [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255471.

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Orientador : Ranulfo Monte Alegre<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-03T14:22:54Z (GMT). No. of bitstreams: 1 Alberte_TaniaMaria_D.pdf: 9835439 bytes, checksum: 74ab1a7efc7d568bc9c3b37f762f08ec (MD5) Previous issue date: 2003<br>Resumo: Reatores "air-lift" são uma classe especial de coluna de bolhas, sendo recentemente utilizados em processos químicos, bioquímicos e em tratamento de águas residuárias. Neste trabalho, estudou-se o desempenho de um reator "air-lift" de tubos concêntricos no tratam

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Takwi, Colette Nchong. "An assessment of the management of odour at the Athlone wastewater treatment works, Cape Town." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2788.

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Thesis (MTech (Environmental Management))--Cape Peninsula University of Technology, 2017.<br>¹Odour nuisance is increasingly becoming one of the major environmental problems in various countries across the world, especially odour associated with wastewater (Alfonsin et al., 2015; Schlegelmilch et al., 2005; Gostelow et al., 2001). As a result, the management of odour from Wastewater Treatment Works (WWTW) has become one of the environmental challenges besetting these facilities in recent times. The dispersion of odour across the physical boundary of wastewater treatment facilities presents not

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Mukandi, Melody. "Modelling of a bioflocculant supported dissolved air flotation system for fats oil and grease laden wastewater pretreatment." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2637.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2017.<br>In the recent past, the poultry industry in South Africa has grown due to an increased demand of poultry products as a result of population growth and improved living standards. Furthermore, this has led to poultry slaughterhouses generating high strength wastewater which is laden with a high concentration of organic and inorganic pollutants from the slaughtering process and sanitation of equipment and facilities. As a result, South Africa has promulgated restrictions and a set of quality standards fo

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Chevalier, Vincent. "Purification de l'air des cabines aéronautiques : Élaboration d'adsorbants innovants et compréhension de leurs comportements à des teneurs en composés organiques volatils sub-ppm." Thesis, Université Grenoble Alpes (ComUE), 2018. http://www.theses.fr/2018GREAI093.

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L’avion est un mode de transport en forte croissance qui n’échappe pas aux exigences d’un public de plus en plus sensibilisé à la pollution de l’air intérieur. De plus, l’arrivée de futurs réglementations limitants la concentration des COVs (Composés Organiques Volatils) dans les cabines aéronautiques nécessite de développer des solutions innovantes de traitement de l’air dont la compacité et la consommation énergétique soient compatibles avec les contraintes du secteur. Au vu de ces contraintes, l’adsorption est le procédé le plus approprié. Le charbon actif est le matériau le plus utilisé en

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Queiroz, Lorena Aires Lombardi. "Desenvolvimento de um sistema de purificação de água com bomba de calor." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/255771.

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Orientador: Vivaldo Silveira Júnior<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos<br>Made available in DSpace on 2018-08-18T01:57:04Z (GMT). No. of bitstreams: 1 Queiroz_LorenaAiresLombardi_M.pdf: 3856550 bytes, checksum: 772ac0e513c805ef7e7a144496ffab9a (MD5) Previous issue date: 2011<br>Resumo: O processo mais simples para que a água alcance pureza adequada é a destilação convencional, porém este método tem como inconvenientes seu alto gasto com energia elétrica e seu elevado consumo de água. Buscando alternativas para produzir água pur

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Carvalho, villarim Pedro. "New compacts systems for biogas upgrading." Electronic Thesis or Diss., Littoral, 2023. http://www.theses.fr/2023DUNK0697.

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Le biogaz est une source d'énergie renouvelable produite naturellement par la digestion anaérobie de matières organiques. Il se compose principalement de méthane (CH4) et de dioxyde de carbone (CO2). Il contient également des traces de vapeur d'eau, de composés organiques volatils (COV) et de sulfure d'hydrogène. La valorisation du biogaz en biométhane nécessite l'élimination des contaminants présents dans le biogaz brut, en réduisant le niveau d'impuretés afin d'obtenir une teneur élevée en CH4, de l'ordre de 90 à 99 %. Les utilisations du biométhane sont les mêmes que celles du gaz naturel,

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François, Mathilde. "Potentialités des MOFs pour l’épuration de l’air vis-à-vis de mélanges de composés organiques volatils en présence d’humidité." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0024.

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Les composés organiques volatils (COVs) constituent aujourd'hui un réel enjeu dans nos sociétés notamment d'un point de vue de la qualité de l'air. En effet, depuis plusieurs années une prise de conscience est née face aux effets négatifs des COVs dans l'air. Néanmoins, les recherches se sont focalisées dans un premier temps sur les effets de la pollution urbaine en air extérieur et ont négligé de s'intéresser au traitement de l'air intérieur. C'est donc plus récemment que des études ont été menées sur la pollution de l'air intérieur et les risques sanitaires associés pour la population passan

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Magalhães, Aléx Fabiano Ribeiro de. "Proposição, implantação, partida e ajustes de reatores biologicos e fisico-quimicos para tratamento e reciclagem de efluentes de lavadores de veiculos em escala real." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/258217.

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Orientador: Carlos Gomes da Nave Mendes<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Civil, Arquitetura e Urbanismo<br>Made available in DSpace on 2018-08-04T11:01:23Z (GMT). No. of bitstreams: 1 Magalhaes_AlexFabianoRibeirode_M.pdf: 2242026 bytes, checksum: b4ae2e107eb7317d892ade5a7815f862 (MD5) Previous issue date: 2005<br>Resumo:Com a intenção de preencher a lacuna decorrente de poucos estudos sobre o tratamento de efluentes da lavagem de veículos, na presente pesquisa, propõe-se um sistema de tratamento composto de biofiltros aerados submersos se

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Fiorenza, Roberto. "TiO2-based catalysts for energy production and environmental protection." Doctoral thesis, Università di Catania, 2017. http://hdl.handle.net/10761/3868.

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In the next future commercial photocatalysis would become both technically and economically competitive to counterpart technologies, for example hydrogen production from hydrocarbon reforming, CO2 conversion by dry reforming and chemical synthesis, water treatment by adsorption, biological treatment or advanced oxidation processes (AOPs). Furthermore, compared to above industrial processes, air purification especially indoor air purification appears to be a promising field in which photocatalysis could potentially act as a commercialized technology, integrating with particulate matter removal

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Cioce, Christian R. "Computational Investigations of Potential Energy Function Development for Metal-Organic Framework Simulations, Metal Carbenes, and Chemical Warfare Agents." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5666.

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Metal-Organic Frameworks (MOFs) are three-dimensional porous nanomaterials with a variety of applications, including catalysis, gas storage and separation, and sustainable energy. Their potential as air filtration systems is of interest for designer carbon capture materials. The chemical constituents (i.e. organic ligands) can be functionalized to create rationally designed CO2 sequestration platforms, for example. Hardware and software alike at the bleeding edge of supercomputing are utilized for designing first principles-based molecular models for the simulation of gas sorption in these fra

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Мережаний, Ю. Г., та В. С. Антонюк. "Система фільтрації приточного повітря в виробничих приміщеннях прецизійного складального виробництва". Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/11370.

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Daniel-David, Delphine. "Etude du mécanisme de désémulsification des émulsions de type eau dans pétrole brut par des polymers siliconés." Compiègne, 2006. http://www.theses.fr/2006COMP1636.

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Des émulsions stables de type eau dans huile se forment lors de la production de pétrole brut. Les asphaltènes du pétrole créent un film viscoélastique empêchant les gouttelettes d'eau de coalescer. La séparation de l'eau par l'ajout de tensioactifs est indispensable avant l'étape du raffinage. Notre étude a consisté à comprendre l'action de copolymères siliconés efficaces. Le copolymère choisi a d'abord été caractérisé à l'interface eau/air afin de cerner son comportement en l'absence des molécules du pétrole. Ensuite, afin d'élucider le mécanisme de désémulsification, plusieurs techniques on

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Serafin, Guillaume. "Stratégies optimales de maîtrise de la qualité de l’air dans les bureaux : évaluation du potentiel des matériaux adsorbants." Thesis, La Rochelle, 2020. http://www.theses.fr/2020LAROS001.

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Les nombreuses études menées en France et dans le reste du monde au cours des vingt dernières années ont permis d’inscrire la qualité de l’air intérieur comme une problématique environnementale à part entière. L’enjeu de cette thèse repose sur l’évaluation de la qualité de l’air dans les bâtiments de bureaux, de sa qualification par le choix d’indicateurs pertinents à la recherche de solutions d’amélioration. Elle comporte deux volets aux objectifs complémentaires. Le premier traite de la caractérisation fine du potentiel des matériaux adsorbants pour la maîtrise de la qualité de l’air, sur la

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Benyamina, Djalila. "Amélioration du fonctionnement d'un système extensif de traitement d'eaux usées urbaines (lagune de Rethondes) par recirculation et aération modérée." Compiègne, 1996. http://www.theses.fr/1996COMP965S.

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Au cours des 15 dernières années, le traitement extensif des eaux usées a pris en France une place importante parmi les procédés de traitement des eaux usées urbaines. Il représente environ 20 % du parc des stations traitant ces eaux. L'épuration résulte essentiellement de l'action symbiotique de communautés bactériennes aérobies et algales. Ces dernières génèrent par photosynthèse l'oxygène dissous nécessaire à la dégradation de la matière organique par les bactéries aérobies. Cette matière est d'abord convertie en CO2 et ammonium puis en présence de la lumière solaire en algues. Ce procédé d

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Forrest, Katherine A. "Understanding Gas Sorption Mechanisms in Metal–Organic Materials via Computational Experimentation." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/7023.

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Metal–organic materials (MOMs), a type of porous crystalline structure composed of organic ligands jointed with metal ions, have captured the interest of scientists as potentially useful in gas sorption applications. Some of the most crucial avenues of investigation are in H2 storage (for use as a clean burning fuel source) and CO2 capture and sequestration (to remove the greenhouse gas from the environment). A major advantage of MOMs for such applications is their high variability in terms of physical dimensions and chemical moieties, based on composition and synthesis co

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Franz, Douglas M. "Simulation and Software Development to Understand Interactions of Guest Molecules inPorous Materials." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7788.

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The effect of inclusion of explicit polarization is investigated through several theoret- ical studies of crystalline porous materials herein. In addition to the use of Monte Carlo simulation for such studies, a robust molecular dynamics software is presented which is suitable for analyzing time dependent properties of gases or other molecules in porous materials and other condensed phase systems. Metal-organic frameworks (MOFs) are the main focus of the work included here, a relatively young class of materials originally in- troduced in the early 1990s. These are usually three dimensional cry

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Vašalovská, Petra. "Modelový výzkum účinnosti separačních technologií úpravy vody." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225461.

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Goal of this research was to recognize dissolved air flotation efficiency by the help of turbidity and UV absorbance removal for different conditions. As different conditions are meant the efficiency for different baffle position, different detention time in separation zone and checking results with adding chemicals compared to results without adding chemicals.

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Hauck, Wilhelm. "Procédé d'adsorption sur charbon actif avec régénération thermique de la colonne par induction électromagnétique : application au traitement d'air chargé en composés organiques volatils." Vandoeuvre-les-Nancy, INPL, 1997. http://www.theses.fr/1997INPL011N.

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Cette étude concerne un procédé d'épuration d'air chargé en COV par adsorption sur charbon actif. Deux produits types ont été choisis : le toluène et le butanol. On présente d'abord la mise au point d'une installation expérimentale de mesure d'isothermes d'adsorption mono- et multiconstituant. Les résultats expérimentaux sont confrontés avec différents modèles d'adsorption. Dans une deuxième partie, on étudie le chauffage par induction d'un lit de charbon actif en vue de sa régénération. La solution analytique des équations de l'électromagnétisme (Maxwell) pour une géométrie cylindrique permet

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Cardenas, Cristian. "Analyse et modélisation du comportement des caissons d'épuration de l'air équipant les engins de chantier pour la protection des opérateurs contre les gaz et vapeurs." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0090.

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Cette thèse développe quatre modèles pour simuler le procédé d’adsorption de l’ammoniac sur du charbon actif dopé au sulfate de zinc. Ils sont décrits par des équations de bilans de matière, de la thermodynamique, de l’hydrodynamique et de la cinétique d’adsorption. Puisqu’il est nécessaire de connaitre les valeurs de certains paramètres pour simuler les modèles, le charbon actif est d’abord caractérisé. Des mesures expérimentales des isothermes d’adsorption de l’ammoniac sur le charbon actif dopé ont d’abord été réalisées. Une méthode basée sur l’analyse de sensibilité des paramètres a ensuit

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Grobbelaar, Loreen. "Treatment of biodiesel wastewater in a hybrid anaerobic baffled reactor microbial fuel cell (ABR-MFC) system." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/2812.

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Thesis (Master of Engineering in Chemical Engineering)--Cape Peninsula University of Technology, 2019.<br>The biodiesel industry produces large volumes of biodiesel wastewater (BDWW) during the purification of crude biodiesel. This wastewater is characterised by high concentrations of chemical oxygen demand (COD), biological oxygen demand (BOD), total suspended solids (TSS), and fats, oils and greases (FOG) which in turn defines BDWW as a highly polluted effluent. The low nitrogen and phosphorous content of BDWW creates an unfavourable environment for the growth of microorganisms, thereby maki

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