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Dissertations / Theses on the topic 'Processo Fischer-Tropsch'

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Published: 4 June 2021

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1

Santos, Onelia Aparecida Andreo dos. "Sintese de Fischer-Tropsch em catalisadores de ferro." [s.n.], 1986. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267078.

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Orientador: Mario de Jesus Mendes<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Campinas<br>Made available in DSpace on 2018-07-17T00:50:54Z (GMT). No. of bitstreams: 1 Santos_OneliaAparecidaAndreodos_M.pdf: 5044753 bytes, checksum: 4d24d41e569f872f9de1eb02687ec8d3 (MD5) Previous issue date: 1986<br>Resumo: A reação de síntese de Fischer - Tropsch tem merecido uma grande atenção pelo seu interesse tecnológico e científico. Naturalmente este interesse está, em grande parte, associado ao problema da escassez do petróleo, na medida em que a síntese de

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2

Porto, Luismar Marques. "Estudo de catalisadores de ferro fundido para a síntese Fischer-Tropsch." Florianópolis, SC, 1987. http://repositorio.ufsc.br/xmlui/handle/123456789/75437.

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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Curso de Pós-Graduação em Físico-Química<br>Made available in DSpace on 2012-10-16T01:18:50Z (GMT). No. of bitstreams: 0Bitstream added on 2016-01-08T15:46:06Z : No. of bitstreams: 1 202998.pdf: 4722121 bytes, checksum: 2b154256d729c37d2fe8bf2aae06aee7 (MD5)

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3

Silva, Dagoberto de Oliveira. "Nanopartículas bimetálicas Co/Pt preparadas em líquidos iônicos e aplicação em processo Fischer-Tropsch." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/85131.

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O presente trabalho descreve a síntese e caracterização de nanopartículas bimetálicas de cobalto e platina, estabilizadas por líquidos iônicos, para aplicação como catalisadores em reações de hidrogenação de monóxido de carbono (Reação Fischer-Tropsch) para produção de hidrocarbonetos. A formação das nanopartículas bimetálicas foi realizada pela hidrogenação dos precursores de cobalto (Cobaltoceno) e platina (Pt2dba3) dissolvidos em líquidos iônicos derivados do cátion imidazólio. A hidrogenação resultou em nanopartículas magnéticas de CoPt3 com tamanho médio de 7,3 nm utilizando o líquido iôn

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4

Yamada, Shinobu Tomas. "Modelagem e simulação de um reator multitubular em leito fixo com cinética Fischer Tropsch e catalisador de cobalto." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266893.

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Orientador: Reginaldo Guirardello<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-18T13:21:06Z (GMT). No. of bitstreams: 1 Yamada_ShinobuTomas_D.pdf: 3876142 bytes, checksum: 951723c2abec9e70853595542ea18fe3 (MD5) Previous issue date: 2011<br>Resumo: Esta tese apresenta a cinética e a fluidodinâmica do processo Fischer Tropsch realizado nos softwares científicos Fortran (Formula Translation) e CFX (Fluidodinâmica Computacional) da AEA Technology plc. O presente trabalho é uma simulação computacional de um sistema

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5

Freitas, Antonio Carlos Daltro de 1986. "Análise termodinâmica de processos de reforma do metano e da síntese Fischer-Tropsch." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266746.

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Orientador: Reginaldo Guirardello<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-20T08:37:19Z (GMT). No. of bitstreams: 1 Freitas_AntonioCarlosDaltrode_M.pdf: 4674734 bytes, checksum: a2869576ee45e8734ab4fa69a217f9ef (MD5) Previous issue date: 2012<br>Resumo: As reações de reforma de hidrocarbonetos leves, especialmente o gás natural, são reações químicas de elevada importância e representam etapas chave para a produção em larga escala de hidrogênio, para uso em reações de hidrogenação ou em células a comb

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6

Silva, Dagoberto de Oliveira. "Nanopartículas de cobalto preparadas em líquidos iônicos: síntese, caracterização e aplicação em processo Fischer-Tropsch." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/14350.

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O presente trabalho descreve a síntese e caracterização de nanopartículas de cobalto estabilizadas por líquidos iônicos e a aplicação das mesmas como catalisadores em reações de hidrogenação de monóxido de carbono para produção de hidrocarbonetos. A síntese de hidrocarbonetos via monóxido de carbono e hidrogênio, conhecida como processo Fischer-Tropsch, vem sendo muito estudada para produção de diesel e bases de lubrificantes, pois é uma excelente opção como fonte alternativa de combustível. A formação de nanopartículas de cobalto foi realizada pela simples decomposição térmica de precursores

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7

Freitas, Antonio Carlos Daltro de 1986. "Análise termodinâmica da transformação de biomassa em combustíveis utilizando técnicas de otimização global." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266028.

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Orientador: Reginaldo Guirardello<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-27T12:37:15Z (GMT). No. of bitstreams: 1 Freitas_AntonioCarlosDaltrode_D.pdf: 6856921 bytes, checksum: 9a39352c311e27b7f5ddb44084565f2e (MD5) Previous issue date: 2015<br>Resumo: Há um crescente interesse por fontes alternativas de energia limpa, segura e renovável, e por tecnologias de transformação destas fontes em combustíveis. Dentre esses processos, a reação de gaseificação utilizando água supercrítica (SCWG), visando a produçã

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8

BEZERRA, Victor Vital Leão. "Síntese de Fischer-Tropsch sobre catalisadores convencionais e estruturado para obtenção de combustíveis líquidos." Universidade Federal de Pernambuco, 2015. https://repositorio.ufpe.br/handle/123456789/16895.

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Submitted by Isaac Francisco de Souza Dias (isaac.souzadias@ufpe.br) on 2016-05-02T17:40:30Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação Mestrado_Victor Vital L Bezerra.pdf: 2015533 bytes, checksum: 69f4ce642504e6d617f898f6de8e138c (MD5)<br>Made available in DSpace on 2016-05-02T17:40:30Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertação Mestrado_Victor Vital L Bezerra.pdf: 2015533 bytes, checksum: 69f4ce642504e6d617f898f6de8e138c (MD5) Previous issue date: 2015-02-2

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Bezerra, Marcio Barbalho Dantas. "Implementa??o de um modelo computacional para estudo do processo Fischer-Tropsch em reator de leito de lama." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15798.

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Made available in DSpace on 2014-12-17T15:01:24Z (GMT). No. of bitstreams: 1 MarcioBDB_DISSERT.pdf: 1427541 bytes, checksum: 4ea4ab1aa3dd7faa960c62967facffc8 (MD5) Previous issue date: 2010-09-30<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>This work aims at the implementation and adaptation of a computational model for the study of the Fischer-Tropsch reaction in a slurry bed reactor from synthesis gas (CO+H2) for the selective production of hydrocarbons (CnHm), with emphasis on evaluation of the influence of operating conditions on the distribution of products formed

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10

Cardoso, Marco Tsuyama. "Da iluminação das cidades no século XIX às biorrefinarias modernas: história técnica e econômica da gaseificação." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/86/86131/tde-11032014-171935/.

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Este trabalho tem como objetivo traçar um panorama geral da tecnologia de gaseificação ao longo da história. Inicialmente concebida para obter gás do carvão mineral e possibilitar uma iluminação pública mais eficiente, a gaseificação passou por várias fases. Na virada do século XIX para o XX, quando o town gas perdeu a iluminação pública para a eletricidade, a produção de gás passou a se voltar para aquecimento e cocção. Se novas possibilidades foram criadas a partir da descoberta da síntese de Fischer-Tropsch (que possibilitava a transformação do gás de síntese em líquidos que poderiam substi

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11

Gonçalves, Emerson Sarmento. "Projeto de catalisadores para reações com gas de sintese." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266355.

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Orientador: Gustavo Paim Valença<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-07-27T17:48:45Z (GMT). No. of bitstreams: 1 Goncalves_EmersonSarmento_M.pdf: 6577943 bytes, checksum: 7f0584919df305f521c9d43f2ec3654a (MD5) Previous issue date: 2001<br>Resumo: A partir do gás de síntese (que constitui uma mistura gasosa de óxidos de carbono e hidrogênio), pode-se obter hidrocarbonetos, álcoois e aldeídos. Estes podem ser obtidos também através da via petroquímica. Portanto, a produção desses compostos a partir d

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12

Frederick), Potgieter Hennie (Hendrik. "Fischer-Tropsch ionomeric waxes." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53427.

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Thesis (PhD)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: This dissertation describes work done on Fischer- Tropsch ionomeric waxes. The waxes are characterized with respect to the method of manufacture, the mechanism of the oxidation process, the saponification, the physical properties, the rheological properties, the morphology and the water absorption of the waxes. Different methods of physical and mechanical analysis are used to prove at which concentration level, for each type of cation tested arid for each type of oxidized and grafted wax prepared, the formation of multipl

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13

Chavez, Jorge A., and Richard P. Korswagen. "COMPUESTOS CARBENICOS y SU IMPLICANCIA EN EL MECANISMO DEL PROCESO FISCHER-TROPSCH." Revista de Química, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/101202.

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Mediante el proceso Fischer-Tropsch es posible obtener, a partir del carbón, hidrocarburos que pueden ser utilizados como combustible. Como veremos más adelante,esta fue la razón del rápido desarrollo de este proceso.Los compuestos carbénicos son estudiados en los laboratorios de la SecciónQuímica de la Pontificia Universidad Católica del Perú, y siendo el procesoFischer-Tropsch el ejemplo de catálisis , heterogénea por excelencia,resulta interesante conocer su relación.El presente artículo es una pequeña introducción a la síntesis FischerTropsch. Debido a la complejidad y al gran número de pu

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14

Finch, Karol Paula. "Synthesis, characterisation and reactivity studies of μ(α, ω)-alkanediyl complexes of ruthenium, iron and cobalt". Master's thesis, University of Cape Town, 1988. http://hdl.handle.net/11427/21938.

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The new series of μ(α, ω)-alkanediyl compounds of ruthenium, [CpRu(CO)₂]₂[μ-(CH₂)ₙ], where n=5-10, have been prepared from Na[CpRu(CO)₂] and the corresponding diiodoalkane. These compounds, which are stable crystalline solids at ambient temperature, have been fully characterised by microanalysis, infrared, ¹H and ¹³C NMR spectroscopy, melting point and mass spectrometry. The new heterodinuclear complex [Cp(CO)₂Fe(CH₂)₄Ru(CO)₂Cp] has been synthesised by the reaction of [CpFe(CO)₂(CH₂)₄I] with Na[CpRu(CO)₂] and characterised by all the above mentioned techniques.

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15

Mirzaei, Nima. "Modelling the Production of Biofuels via Olefins Oligomerisation." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-282822.

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The technical feasibility of gasoline and diesel range hydrocarbons production through oligomerisation of olefins, starting from biomass with the intermediary steps of gasfication, water-gas shift reaction and syngas-to-olefins synthesis was investigated, through mathematical modelling and simulation on Matlab. The model for the gasifier was based on minimisation of Gibbs free energy and its results showed that higher carbon efficiencies could be achieved at lower pressures and steam inlet, and more inlet energy, by pre-heating the gasifying agents. The water-gas shift reactor was used to incr

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16

McNab, Andrew Irvine. "Quantification and qualification of species adsorbed on Fischer-Tropsch catalysts." Thesis, University of Aberdeen, 2017. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=235995.

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Due to the combined heavy dependence on crude oil and the unpredictable nature of the associated markets, an alternative means to produce the required hydrocarbon based products is much desired. The Fischer-Tropsch synthesis provides a route to the production of synthetic crude oil by a catalytic reaction between carbon monoxide and hydrogen (collectively referred to as syngas) at moderate temperatures and pressures. First discovered in the early 1900's, the process results in a multitude of products which can supply a range of transportation fuels and petrochemicals. However, knowledge of the

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17

Pienaar, Andrew. "Metal carboxylate complexes relevant to the Fischer-Tropsch synthesis." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1158.

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18

Kostas, John Nicholas. "Temperature-programmed studies of alkali-promoted Ni/SiO[subscript]2 catalysts." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/12909.

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Nguyen, Tuan Huy Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "Semiconductor oxide supported Mo and Mo-W carbide catalysts for Fischer-Tropsch synthesis." Awarded by:University of New South Wales. School of Chemical Sciences and Engineering, 2006. http://handle.unsw.edu.au/1959.4/26969.

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Fischer-Tropsch synthesis reaction to produce sulphur free hydrocarbons has enjoyed a resurgent in interests due to increases in world oil prices. In this work, the suitability of Mo and Mo-W carbides has been investigated as a possible cost-effective alternative to noble metals in Fischer-Tropsch synthesis. The molybdenum and tungsten monometallic and bimetallic carbides were prepared through precipitation from homogeneous solution to the sulphide followed by carburization with a mixture of propane and hydrogen to produce the resulting metal carbide. A 23 factorial design strategy was employe

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Lee, Yong Joon Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "Synthesis, characterisation, and evaluation of supported cobalt molybdenum nitride for Fischer-Tropsch reaction." Publisher:University of New South Wales. Chemical Sciences & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41487.

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Fischer-Tropsch Synthesis (FTS) is known as the most practical way to convert natural gas to hydrocarbon products including synthetic fuel depending on the catalysts and operating conditions. Australia has 25% of world's natural gas resources hence Australia's crude oil dependency can be reduced extensively by developing catalysts that will facilitate the technique of converting natural gas to synthetic fuel. Molybdenum nitride has been employed in this study for FTS because of its superior mechanical strength, stability, exceptional resistance to carbon deposition & suifur poisoning. In part

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Coombes, Matthew. "The effect of silica on the reduction of precipitated iron-based fischer-tropsch catalysts." Thesis, Nelson Mandela Metropolitan University, 2016. http://hdl.handle.net/10948/14873.

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Iron Fischer-Tropsch (FT) catalysts are typically prepared as iron oxides which are reduced to FT-active iron metal and iron carbide prior to FT synthesis. The iron oxides contain a variety of diﬀerent chemical and structural promoters to alter FT-activity. Silica is a common structural promoter which stabilises the formation of small crystallites and provides mechanical integrity to the catalyst. However, silica inhibits the reduction of the oxide precursor to the FT-active phases. This ultimately aﬀects catalyst activity and product selectivity. It has been proposed that the silica interacts

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22

Govender, Nilenindran Sundra. "Recycling the tail-gas during the low temperature Fischer-Tropsch process." Master's thesis, University of Cape Town, 2005. http://hdl.handle.net/11427/5328.

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Includes bibliographical references (leaves 98-106).<br>For the economically viable operation of an iron-based Fischer-Tropsch technology, two options are available: (i) use a diluted feed, such as nitrogenrich synthesis gas, thereby saving on synthesis gas costs [Jess et aI., 1999] or (ii) recycle of the unconverted synthesis gas that leaves the reactor, after condensation of the liquid products (or use a number of reactors in series with intermediate condensation of the products). The tail-gas from the FischerTropsch reactor contains un-reacted synthesis gas, CO2, water vapour and lower hydr

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Teoh, Wey Yang Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "Flame spray synthesis of catalyst nanoparticles for photocatalytic mineralisation of organics and Fischer-Tropsch synthesis." Awarded by:University of New South Wales. School of Chemical Sciences and Engineering, 2007. http://handle.unsw.edu.au/1959.4/28259.

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In this thesis, a range of TiO2-based photocatalysts and cobalt-based Fischer-Tropsch (FT) catalysts were developed and synthesised via the one-step Flame Spray Pyrolysis(FSP). The work starts with the demonstration of bare TiO2 nanoparticles synthesis with controlled characteristics such as specific surface areas, crystallite sizes and anatase content. A comparative study was carried out by benchmarking with commercial Degussa P25 TiO2. The FSP TiO2 was shown to be more efficient in mineralising pollutants requiring direct charge transfer such as the saccharides, while P25 was better for mine

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Fraser, Ian. "The feasibility of high synthesis gas conversion over ruthenium promoted iron-based Fischer Tropsch catalyst." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2588.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2017.<br>One of the very promising synthetic fuel production strategies is the Fischer-Tropsch process, founded on the Fischer-Tropsch Synthesis, which owes its discovery to the namesake researchers Franz Fischer and Hans Tropsch. The Fischer-Tropsch Synthesis (FTS) converts via complex polymerisation reaction a mixture of CO and H2 over transition metal catalysts to a complex mixture of hydrocarbons and oxygen containing compounds with water as major by-product. The mixture of CO and H2 (termed syngas) may b

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Whiting, Gary Ken. "Development of a microreactor system for unsteady-state Fischer- Tropsch synthesis." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/76086.

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Vibrofluidized microreactor systems have been developed for studies of unsteady-state Fischer-Tropsch synthesis. This development is aimed at preventing carbon deposition on a fused-iron catalyst in a novel reactor called the “heat-tray.” This reactor involves a supernatant gas flowing over a shallow fluidized bed of catalyst particles. Three systems were built: (1) a vibrofluidized-bed microreactor system for obtaining baseline carbon deposition infonnation under industrially important reaction conditions; (2) a sliding-plug vibrofluidized-bed microreactor system for rapid switching of feed g

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Goho, Danielle Sympathie. "Selective production of nitrogen-containing compounds via a modified Fischer-Tropsch process." Master's thesis, Faculty of Engineering and the Built Environment, 2021. http://hdl.handle.net/11427/33736.

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Research on the co-feeding of ammonia into the Fischer-Tropsch (FTS) process over ironbased catalysts revealed that the presence of ammonia during the FTS leads to the formation of nitrogen-containing compounds (NCCs). Recent studies on the addition of ammonia to the FTS process, now known as the Nitrogen Fischer-Tropsch (NFTS) process, reported that the production of NCCs during the NFTS process is enhanced by the presence of oxygenates. The studies, therefore, suggested that oxygenates are the primary precursors of NCCs. However, due to the gap in knowledge related to the NFTS reactions mech

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Steynberg, Andre Peter. "Process intensification for the iron-catalysed slurry-phase Fischer-Tropsch Reactor System." Master's thesis, University of Cape Town, 2014. http://hdl.handle.net/11427/13279.

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Includes bibliographical references.<br>A set of operating conditions was identified with the potential to enable improved slurryphase reactor productivity for hydrocarbon production using Fischer-Tropsch synthesis. Compared to the most relevant prior art publication, this requires operation at higher gas velocity, higher catalyst concentration and at higher temperature and/or pressure. The closest prior art proposal was published by Van der Laan et al. (1999) and a target was set to improve the reactor productivity by at least 50 %, relative to this reference, while also ensuring stable catal

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Wigzell, Fiona A. "Characterising the activation process for cobalt catalysts used in Fischer-Tropsch synthesis." Thesis, University of Glasgow, 2012. http://theses.gla.ac.uk/3753/.

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The effects of precursor, support and calcination procedure on the physical and chemical properties of supported cobalt catalysts have been investigated. A multiple characterisation approach of thermogravimetric analysis, differential scanning calorimetry, X-ray diffraction and transmission electron microscopy was employed in order to gain understanding into the calcination and reduction processes. In addition, the catalysts were screened on a purpose built fixed bed reactor, under industrially relevant conditions, to determine effect of catalyst preparation on Fischer-Tropsch activity.

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Hondow, Nicole S. "The synthesis of new heterogeneous Fischer-Tropsch catalysts : the incorporation of metal aggregates in mesoporous silicas." University of Western Australia. School of Biomedical, Biomolecular and Chemical Sciences, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0083.

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Transition metals have been extensively studied as catalysts, and certain metals are known to be highly selective and active for certain processes. It is possible to use metal clusters as models for reactions occurring at metal surfaces, but it is often found that in practical applications these complexes are unstable and break down. It is possible to support or stabilise a metal species on, or in, an inorganic framework, making heterogeneous catalysts. A study of metal cluster chemistry with mixed-donor phosphine ligands was conducted, with several new ruthenium complexes synthesised. The che

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Elbashir, Nimir O. M. Roberts Christopher B. "Utilization of supercritical fluids in the Fischer-Tropsch synthesis over cobalt-based catalytic systems." Auburn, Ala., 2004. http://repo.lib.auburn.edu/EtdRoot/2004/FALL/Chemical_Engineering/Dissertation/ELBASHIR_NIMIR_25.pdf.

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Van, der Westhuizen Katriena Elizabet. "Comprehensive multidimensional gas chromatography for the analysis of Fischer-Tropsch products." Thesis, Stellenbosch : Stellenbosch University, 2011. http://hdl.handle.net/10019.1/18006.

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Thesis (PhD)--University of Stellenbosch, 2011.<br>ENGLISH ABSTRACT: The analysis of Fischer–Tropsch–derived (FT–derived) synthetic crude and derived products is very challenging because of the highly complex nature of these products. In this study, the use of comprehensive multidimensional gas chromatography (GCxGC) with time-of-flight mass spectrometry (TOF-MS) and flame ionisation detection (FID) was investigated for the analysis of these products and the technique was found to be invaluable for the analysis of these complex mixtures. The compositions of FT synthetic crude, produced a

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Bundhoo, Adam. "Contribution à l'étude mécanistique de la synthèse Fischer-Tropsch: préparation et caractérisation de catalyseurs de cobalt et de nickel." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210084.

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Ce travail de doctorat s’inscrit dans le cadre de la recherche fondamentale inhérente à la réaction catalytique d’hydrogénation du CO, qui permet de produire du pétrole de synthèse à partir des autres ressources fossiles disponibles à l’état naturel (gaz naturel et charbon).<p>Les objectifs de ce travail s’articulent autour de deux méthodes originales, respectivement de préparation et de caractérisation des catalyseurs. La première permet la formation in situ de catalyseurs par voie oxalique, alors que la seconde est une méthode de cinétique transitoire chimique appliquée à la réaction CO + H2

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Menzli, Slim. "WATER FOOTPRINT OF AVIATION FUEL SYNTHESIS BY THE FISCHER TROPSCH PROCESS USING SUGAR CANE WASTE & LANDFILL GAS AS FEEDSTOCKS." Master's thesis, University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4018.

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The recent spikes in oil prices have spurred an already bullish demand on biofuels as a source of alternative energy. However, the unprecedented price records set simultaneously by staple food have raised high concerns about potential impacts of biofuels on the global agricultural landscape as fuel and food markets are being inextricably coupled. The revival of interest in the Fischer-Tropsch (FT) process comes into full force since it offers a promising way to produce carbon-neutral liquid fuels which are readily usable with today's existing infrastructure. The FT synthesis offers the possibi

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McMillian, Michael H. "Combustion analysis and particulate mutagenicity characterization for a single-cylinder diesel engine fueled by Fischer-Tropsch derived liquids." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2303.

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Thesis (Ph. D.)--West Virginia University, 2002.<br>Title from document title page. Document formatted into pages; contains xvi, 148 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 162-183).

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Patterson, Veronica A. "The effects of carbon deposition on catalyst deactivation in high temperature Fischer-Tropsch catalysts." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3086.

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In this work, carbonaceous deposits on spent HTFT catalysts were investigated. This research was required in order to better understand the observed loss in productivity observed in the industrial reactors, with the aim of improving the economy of the HTFT process. A host of complementary techniques were employed to systematically determine the composition of a typical catalyst recovered from a reactor. Spent HTFT catalysts are comprised of magnetite and a mixture of iron carbides as well as adsorbed hydrocarbon products (soft carbon) and hard carbon. Reaction initiates at the particle surface

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Davies, Andrew James. "Spectroscopic studies of the Fischer-Tropsch process and gas sorption in metal organic frameworks." Thesis, University of Nottingham, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.663251.

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An introduction to reaction intermediates and the techniques used to identify them in this Thesis is outlined. Additionally the Fischer-Tropsch reaction is also described. This reaction is the subject of the work presented in Chapters 2 to 4. Chapter 2 The development of a gas pulse initiated time-resolved lA rig is summarised in this Chapter. The effect of various experimental conditions on the duration of the pulse of gas within the IR cell was explored with the use of a KBr sample. Additionally, a repeat of two relevant studies from the literature was performed in order to validate the resu

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Botes, Frederick Gideon. "The addition of HZSM-5 to the Fischer-Tropsch process for improved gasoline production." Master's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/5353.

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Bibliography: leaves 127-129.<br>The Fischer-Tropsch process has two important disadvantages with regard to the production of gasoline. Firstly, the carbon number distribution of the product spectrum follows the statistical Schulz-Flory function. This means that principally hydrocarbons of all lengths are produced and that the gasoline selectivity is limited to a theoretical maximum value of about 48%.

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Guillou, Loïc. "SYNTHESE DE FISCHER-TROPSCH EN REACTEURS STRUCTURES A CATALYSE SUPPORTEE EN PAROI." Phd thesis, Ecole Centrale de Lille, 2005. http://tel.archives-ouvertes.fr/tel-00141507.

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La cinétique et l'exothermicité de la synthèse de Fischer-Tropsch en font un réaction délicate à mener. L'utilisation de réacteurs miniaturisés, qui permettent un meilleur contrôle thermique et utilisent des modes de mise en contact des réactifs et du catalyseur essentiellement contrôlés par la diffusion, pourrait apparaître comme un moyen d'améliorer la maîtrise des conditions de synthèse. Le but de ce travail est de proposer des outils permettant l'application et l'étude de la dite synthèse dans des réacteurs de 200μL de volume.<br />Des réacteurs assemblés à partir de feuillets structurés o

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Cruz, Marcia Gabriely Alves da. "Síntese e análise de catalisadores de ferro suportados em carbono ativado para síntese de Fischer-Tropsch." reponame:Repositório Institucional da UFC, 2014. http://www.repositorio.ufc.br/handle/riufc/10779.

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CRUZ, M. G. A. Síntese e análise de catalisadores de ferro suportados em carbono ativado para síntese de Fischer-Tropsch. 2014 88 f. Dissertação (Mestrado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, 2014.<br>Submitted by Marlene Sousa (mmarlene@ufc.br) on 2015-02-25T12:20:37Z No. of bitstreams: 1 2014_dis_mgacruz.pdf: 2886313 bytes, checksum: 8ae1030214f82e6fd074a2646239d0b9 (MD5)<br>Approved for entry into archive by Marlene Sousa(mmarlene@ufc.br) on 2015-02-26T12:59:37Z (GMT) No. of bitstreams: 1 2014_dis_mgacruz.pdf: 2886313 bytes, checksum:

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Amod, Muhammad Ali. "Carbidization and size effects of unsupported nanosized iron in the low temperature Fischer-Tropsch process." Master's thesis, University of Cape Town, 2012. http://hdl.handle.net/11427/10048.

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Includes abstract.<br>Includes bibliographical references.<br>In the process of developing the most efficient production of fuels from coal or natural gas, there have been major advances in the development of the catalysts used. Previous work at the Centre for Catalysis Research, at the University of Cape Town, has shown great potential and provided a much deeper under- standing of the workings of the Fischer-Tropsch catalyst. The research has found that the catalyst crystallite size plays a crucial part in the product selectivity and requires strict control in order to obtain a certain desire

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Schweicher, Julien. "Kinetic and mechanistic studies of CO hydrogenation over cobalt-based catalysts." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210036.

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During this PhD thesis, cobalt (Co) catalysts have been prepared, characterized and studied in the carbon monoxide hydrogenation (CO+H2) reaction (also known as “Fischer-Tropsch” (FT) reaction). In industry, the FT synthesis aims at producing long chain hydrocarbons such as gasoline or diesel fuels. The interest is that the reactants (CO and H2) are obtained from other carbonaceous sources than crude oil: natural gas, coal, biomass or even petroleum residues. As it is well known that the worldwide crude oil reserves will be depleted in a few decades, the FT reaction represents an attractive al

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Van, der Westhuizen Rina. "The use of multidimensional GC techniques for the analysis of complex petrochemical products." Thesis, Stellenbosch: University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/4639.

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90 leaves on CD format, preliminary i-ix pages and numbered pages 1-81. Includes bibliography, list of figures in color to pdf format (OCR).<br>Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2005.<br>ENGLISH ABSTRACT: The composition of petrochemical products obtained from Fischer Tropsch (FT) technologies is of the highest complexity possible and may contain thousands of components. Chemicals produced from FT feedstocks often contain trace level contaminants that can poison catalysts or that affect product performance in down-line processes. Single dimension GC anal

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Critchfield, Brian L. "Statistical Methods For Kinetic Modeling Of Fischer Tropsch Synthesis On A Supported Iron Catalyst." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1670.pdf.

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Tucker, Chelsea Lyn. "Waste to fuel: designing a cobalt based catalyst and process for once-through Fischer-Tropsch synthesis operated at high conversion." Doctoral thesis, Faculty of Engineering and the Built Environment, 2021. http://hdl.handle.net/11427/33059.

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The production of fuels from waste on a small-scale decentralized level may enhance the liquid fuel security of Sub-Saharan Africa. The Fischer-Tropsch process can be used to convert waste into drop-in fuels. However, operating at small scale in remote locations requires a plant design with lower capital requirements, a greater level of simplicity and utility self-sufficiency. A plant design using an air-fed biogas reformer (without an air separation unit) and a single pass Fischer-Tropsch configuration is proposed. A fundamental requirement of this particular design is that it needs to operat

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Murdoch, Alexander. "Structural and compositional analysis of cobalt palladium model catalyst surfaces." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3640.

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To date there has been much work carried out in the field of surface science to gain a better understanding of the fundamentals of a wide range of catalytic systems and reactions. The central theme of this thesis relates to cobalt based Fischer-Tropsch synthesis (FTS) with particular focus on the structure, composition and surface chemistry of CoPd bimetallic systems and on the interaction of Co with oxide support materials. In the work described in this thesis MEIS and STM are used to examine the growth of Co on Pd{111} and to characterise the structure of CoPd alloys created by thermal treat

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Pinilla, Maria Juliana. "Comparative Life Cycle Assessments of Lignocellulosic and Algae Biomass Conversion to Various Energy Products through Different Pathways." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3740.

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Bioenergy has the potential to reduce the world's dependence on fossil fuels, and to decrease the CO2 emissions due to fossil combustion. Lignocellulosic and algae biomass have been presented as promising feedstocks for bioenergy production. In this study, a comparative Life Cycle Assessment (LCA) has been developed to evaluate the environmental impacts associated with different energy products via different routes across the whole life of algal and lignocellulosic bioenergy. Results were compared per energy basis, the production of 1 million BTU of energy products. For the development of the

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Griffiths, Owen Glyn. "Environmental life cycle assessment of engineered nanomaterials in carbon capture and utilisation processes." Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629663.

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CO2 is a waste product from a number of human activities such as fossil fuel power generation, industrial manufacturing processes, and transport. The rising concentration of CO2 in the atmosphere is heating the planet’s surface via the well-established greenhouse effect; a mechanism for many irreversible climate change impacts. Coupled to this is the ever-increasing global pressure over the availability and access to fossil fuel reserves; the foundations of modern society. In recognition of this CO2 is gaining renewed interest as a carbon feedstock, a changing of attitude viewing it as an asse

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Van, Niekerk Bertina Freda. "Functional and structural diversity of the microbial communities associated with the use of Fischer–Tropsch GTL Primary Column Bottoms as process cooling water / van Niekerk B.F." Thesis, North-West University, 2011. http://hdl.handle.net/10394/7284.

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Despite emerging water shortages, most water is only used once, and often with low efficiency. However, with appropriate treatment, water can be re–used to reduce the demand on freshwater sources. The Department of Water Affairs, South Africa, promotes industries to reduce discharges into water resources in order to sustain an overall good water quality of all water systems. All of this ultimately leads to industries striving towards zero effluent discharge. Primary Column Bottoms (PCBs) is a wastewater stream derived from the Fischer–Tropsch Gas to Liquid process and consists mainly of organi

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Mahmoudi, Hamid. "Performance of cobalt-based eggshell catalyst in low-temperature Fischer-Tropsch synthesis process to produce long-chain hydrocarbons from synthesis gas utilizing fixed-bed reactor technology." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/5656/.

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Preliminary studies of the Fischer-Tropsch synthesis (FTS) process were begun in 2010 at the University of Birmingham. A mini-scale F-T plant was designed and built at the School of Mechanical Engineering to study the production of long-chain hydrocarbons over a cobalt-based FTS process. For this purpose, a series of eggshell cobalt catalysts supported with silica powder with a dissimilar porous structure were investigated to examine the effect of support variables on the catalysts’ performance. The prepared catalysts were characterized with nitrogen adsorption/desorption, X-Ray Diffraction (X

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Crause, Chantelle. "Synthesis and application of carbene complexes with heteroaromatic substituents /." Access to E-Thesis, 2004. http://upetd.up.ac.za/thesis/available/etd-05252005-145146/.

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