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Dissertations / Theses on the topic 'Diesel biofuel'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Kienkas, Liene. "Effect of Biofuel Impurities on the Diesel Oxidation Catalyst." Thesis, KTH, Skolan för kemivetenskap (CHE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-212558.

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Scania provides sustainable transport systems powered by bioethanol, biogas, biodiesel along with hybrid and conventional solutions. Today Scania offers the largest variety of engines operating on alternative fuels in the market. The number of the alternative fuel operated vehicles sold in 2016 increased by 40 % [1]. Nevertheless, one of the alternative fuels – biodiesel - is a source of inorganic contaminants. These impurities can detrimentally affect the diesel truck after-treatment system that is responsible for harmful emission abatement. As a consequence, better understanding of the alter

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2

Janampelli, S. "Catalytic deoxygenation of fatty acids to diesel-range hydrocarbons over promoted platinum catalysts." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2018. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4542.

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Catalysis plays an important role in providing suitable solutions for societal problems. Energy security and environment pollution are the issues gaining world attention. This ignited the zeal to develop solutions for sustainable energy production. Catalytic conversion of biomass to renewable, transport fuels surmounts the shortage of fossil fuel resources and provides future energy assurance. Non-edible vegetable oils and their constituent fatty acids are the right choice of biomass having a vast scope of research to produce renewable fuels. Since this biogenous feedstock is rich in oxygen co

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3

Leite, Danilo. "Desempenho e emissões de motor gerador operando com blendas de diesel/óleo de soja, diesel/óleo de linhaça e diesel/óleo de crambe." Universidade Estadual do Oeste do Paraná, 2018. http://tede.unioeste.br/handle/tede/3779.

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Submitted by Rosangela Silva (rosangela.silva3@unioeste.br) on 2018-06-25T22:43:25Z No. of bitstreams: 2 Danilo_Leite.pdf: 2753950 bytes, checksum: a7ef8ecbdf4d9a992324896c3128c4fc (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Made available in DSpace on 2018-06-25T22:43:25Z (GMT). No. of bitstreams: 2 Danilo_Leite.pdf: 2753950 bytes, checksum: a7ef8ecbdf4d9a992324896c3128c4fc (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-03-14<br>In Brazil, rural communities away from the big centers, away from transm

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4

Unosson, Jon. "Acute cardiovascular effects of biofuel exhaust exposure." Doctoral thesis, Umeå universitet, Lungmedicin, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96449.

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Background Anthropogenic air pollution is a global health problem estimated to contribute to millions of premature deaths. Exposure to biomass smoke is common due to varying sources, such as wildfires, indoor cooking over open fires, and residential heating from wood stoves. In urban environments transportation and industry rely heavily on the combustion of fossil fuels yet environmental policies increasingly support a shift to renewable fuels such as biodiesel. It has not been investigated how either wood smoke or biodiesel exhaust affect human health in general or the cardiovascular system i

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5

Пальоха, І. В. "Еколого-технологічна характеристика дизельного біопалива". Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/13696.

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6

Xie, Yiquan. "On the performance of oxidation catalysts and SCR catalysts in the presence of alkali compounds representative of biofuel contaminants : from the commercial catalysts to the active phase." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066494/document.

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En raison des de l’augmentation de la pollution à l’échelle mondial du notamment aux gaz d'échappement des automobiles, de nouvelles réglementations d'émissions ont été mises en place depuis les années 1990. Ces règlementations ont conduit à une évolution des carburants traditionnels vers les biocarburants et à des systèmes de post-traitement des gaz d'échappement, notamment pour les moteurs diesel, de plus en plus sophistiqués. Ils comprennent à ce jour une série d'unités catalytiques, contenant un filtre à particules, un catalyseur d’oxydation pour traiter le monoxyde de carbone et les hydro

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7

Menkiel, Barbara. "Investigation of soot processes in an optical diesel engine." Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/6970.

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This study is dedicated to investigation of soot formed during combustion in diesel engine. Measurements were performed in a high speed direct injection optical diesel engine. Initially soot particle size, size distribution and soot volume fraction were investigated using time resolved laser induced incandescence (TR-LII) technique. For this study standard diesel fuel was used and measurements were performed for various injection timing and two different engine loads. Investigation showed that TR-LII is a powerful tool that can be used for characterization of in-cylinder soot in the engines. S

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8

Folquenin, Elisiane Karam Folador. "VALIDAÇÃO DAS ANÁLISES FÍSICO-QUÍMICAS EXIGIDAS PELA ANP PARA MISTURAS DIESEL – BIODIESEL." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2008. http://tede2.uepg.br/jspui/handle/prefix/2053.

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Made available in DSpace on 2017-07-24T19:37:57Z (GMT). No. of bitstreams: 1 ELISIANE_KARAM2.pdf: 586066 bytes, checksum: 73601aa55e1af89fd793a2a89fd5ed17 (MD5) Previous issue date: 2008-03-10<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The use of Biodiesel as an additive to diesel in automotive proportion of 2 % v/v is being marketed in Brazil since January 2008. Thus, it is extremely important Know the environmental and commercial impact of samples of B100 produced and mixtures, for example, B2 (stipulated by the ANP - the National Petroleum Agency). The objective thi

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9

CASTILLO, MARCANO SERGIO JOSE. "Technological approaches to improve the engine efficiency and to reduce pollutant emissions of automotive diesel engines." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2588574.

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The research work was mainly focused on the technological approach to improve engine efficiency and reduce pollutant emissions applicable to diesel engines which are very often incompatible were assessed through a set of full- scale tests on a real diesel engine in order to satisfy the new emissions limits. (1) The first strategy evaluated in this work to improve the engine efficiency was the reduction of the mechanical losses: through the incorporation of nanomaterials in the lubricant formulation. The effect of the lubricant oil additivated with MoS2 nanopowders was assessed through a set o

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10

Zare, Ali. "Characterisation of transient diesel engine performance and emissions with oxygenated fuels." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/106950/1/Ali_Zare_Thesis.pdf.

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Globally there are over one billion road vehicles using internal combustion engines many of which are now using alternative fuels as well as or instead of petroleum fuels. This thesis advances knowledge of the use of these fuels under different engine operating conditions by providing an extensive amount of new and fundamental information on a wide range of engine performance and emission parameters. The resource addresses real-world conditions covering combinations of transient (including driving cycle, acceleration and load increase), steady-state operation, cold-start and hot-start. This st

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11

Estrada, Javier Solis. "DESEMPENHO E EMISSÕES DE UM MOTOR DE TRATOR AGRÍCOLA OPERANDO COM MISTURAS DE ÓLEO DIESEL E ETANOL." Universidade Federal de Santa Maria, 2015. http://repositorio.ufsm.br/handle/1/7597.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The growing demand of energy in the world, the decrease of petroleum reserves and the current problems of environmental contamination, increase the interest in renewable energy study for internal combustion engines, to replace partially or completely to petroleum based fuels. In Brazil, among the alternatives fuels, stands out the use of sugarcane ethanol, seen that it is from renewable sources and has high oxygen content, which is favorable to reduce pollutant gases emissions of engine. The blend of ethanol and diesel (ED) has r

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12

Jonsson, Viktor, and Emil Gustafsson. "Fördelar och nackdelar med HVO inom sjöfarten : En undersökning om hur HVO ur drift- och miljösynpunktstår sig mot traditionell diesel och tjockolja." Thesis, Linnéuniversitetet, Sjöfartshögskolan (SJÖ), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-74344.

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Det här arbetet bygger på en litteraturstudie från föregående arbeten som handlar om biobränslet HVO och dess funktion vid drift av flera olika typer av dieselmotorer. Författarna till arbetet har tittat på de för- och nackdelar som föreligger vid drift på HVO och gjort jämförelser med diesel och HFO vilka dominerar inom sjöfarten idag. Arbetet har gjorts med fokus på teknisk drift samt miljöaspekter vid användning och vi har bortsett från annat som tillgång, framställning och distribution. Vi har även tagit upp kommande utsläppskrav inom sjöfarten och diskuterat vad som kan behöva göras för a

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13

Fiorese, Diego Augusto. "DESEMPENHO EM DINAMÔMETRO E EMISSÕES RESIDUAIS DE UM MOTOR DE TRATOR AGRÍCOLA OPERANDO COM MISTURAS BINÁRIAS DE ÓLEO DIESEL B5 E BIODIESEL DE ÓLEO DE FRANGO." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/7542.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Brazil, the third largest producer of biodiesel in the world, and also the third largest producer of chicken, may increase in some regions, the use of oil derived from birds, as an alternative to fossil fuels. In order to increase the range of options to reduce dependence on soybean oil for that purpose, and fostering environmental aspects, it is possible to produce biodiesel from chicken oil, the country that can provide more than 300 thousand tons of oil per year. Considering the application of alternative fuels for diesel engine

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14

Mello, Valdicleide Silva e. "Estudo das propriedades f?sico-qu?micas do biodiesel e suas influ?ncias na deteriora??o dos elast?meros aplicados no sistema de inje??o dos motores diesel." Universidade Federal do Rio Grande do Norte, 2013. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15714.

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Made available in DSpace on 2014-12-17T14:58:22Z (GMT). No. of bitstreams: 1 ValdicleideSM_DISSERT.PDF: 4448803 bytes, checksum: fa349b3064555b231f574c1ef787342f (MD5) Previous issue date: 2013-02-04<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>The biodiesel use has become important due to its renewable character and to reduce environmental impacts during the fuel burning. Theses benefit will be valid if the fuel shows good performance, chemistry stability and compatibility with engines. Biodiesel is a good fuel to diesel engines due to its lubricity. Then, the aime

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15

Luz, Junior Geraldo Eduardo da. "Obten??o de diesel verde por craqueamento termocatal?tico de ?leo de buriti (Mauritia flexuosa L.) sobre materiais nanoestruturados do tipo LaSBA-15." Universidade Federal do Rio Grande do Norte, 2010. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17713.

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Made available in DSpace on 2014-12-17T15:42:08Z (GMT). No. of bitstreams: 1 Geraldo Eduardo da Luz Junior_TESE.pdf: 1318067 bytes, checksum: bc521809cc7c08b9ef99f31a1034f3a2 (MD5) Previous issue date: 2010-04-26<br>In order to obtain a biofuel similar to mineral diesel, lanthanum-incorporated SBA- 15 nanostructured materials, LaSBA-15(pH), with different Si/La molar ratios (75, 50, 25), were synthesized in a two-steps hydrothermal procedure, with pH-adjusting of the synthesis gel at 6, and were used like catalytic solids in the buriti oil thermal catalytic cracking. These solids were charac

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16

Žaglinskis, Justas. "Dyzelinių variklių, dirbančių antros kartos biodegalų mišiniais,eksploatacinių charakteristikų tyrimai." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20141217_125818-22450.

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Disertacijos tyrimų aktualumą lemia energijos panaudojimo efektyvumo didinimas bei aplinkos taršos mažinimas transporto sektoriuje. Darbe sprendžiami eksperimentiniai, matematinio modeliavimo ir metodologiniai uždaviniai, siekiant kompleksiškai ištirti dyzelinių variklių, dirbančių II kartos RRME, alkoholio ir dyzelino mišiniais, eksploatacinius darbo rodiklius. Disertacijoje analizuotas ir įvertintas degalų mišinių panaudojimo lengvųjų automobilių ir pagalbiniame laivo dyzeliniuose varikliuose efektas. Tiriamojo darbo problematika, tikslas, uždaviniai suformuoti išanalizavus transporto sektor

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17

Labecki, Lukasz. "Combustion and emission characteristics of biofuels in diesel engines." Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/5840.

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This study was concerned with the performance of biofuels in diesel engines. Generally, the basic combustion and emission characteristics of Rapeseed Oil (RSO) and Soya Oil (SO) result in a lower in-cylinder pressure peak than diesel. This led to the reduction of Nitrogen Oxides (NOx) emissions and to relatively high soot emissions. Further measurements of RSO were done in order to investigate the influence of injection pressure, injection timing and Exhaust Gas Recirculation (EGR) on combustion and emission characteristics. A high soot emission from RSO was reduced by increased injection pres

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18

Lea-Langton, Amanda Rachel. "PAH Emissions from diesel engines with PAH-free fuels including biofuels." Thesis, University of Leeds, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511131.

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19

PRADELLE, FLORIAN ALAIN YANNICK. "USE OF BIOFUELS IN COMPRESSION IGNITION ENGINES: POTENTIAL OF DIESEL-BIODIESEL-ETHANOL BLENDS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2017. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=29914@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>PROGRAMA DE EXCELENCIA ACADEMICA<br>BOLSA NOTA 10<br>Para substituir parcialmente a demanda em óleo diesel de origem fóssil, reduzir os elevados custos de importação e respeitar as normas ambientais, políticas sustentáveis já levaram a substituir parcialmente óleo diesel por biodiesel. Entretanto, outras tecnologias, como as misturas diesel-biodiesel-etan

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20

VLACHOS, THEODOROS. "EXPERIMENTAL INVESTIGATION ON PERFORMANCE AND EMISSIONS OF AN AUTOMOTIVE DIESEL ENGINE FUELLED WITH BIOFUELS." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2507836.

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Biodiesel is the biofuel most commonly used in Europe, covering approximately 80% of the biofuel market. However, the relationship between biofuel industry and food prices push towards the adoption of new generation biodiesels which could minimize the impact of biofuels production on human food chain. Biodiesel sourced from non-edible seed oils like Jatropha Curcas could therefore be a viable solution for biodiesel production, since allows green cover to wasteland. More recently, also Hydrotreated Vegetable Oil (HVO), obtained by means of a refinery-based process that converts vegetable oils i

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21

Jansson, Rickard. "An Assessment of Biofuels and Synthetic Fuels as Substitutions of Conventional Diesel and Jet Fuels." Thesis, Linköping University, The Department of Physics, Chemistry and Biology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11138.

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<p>Today, a majority of the world’s energy need is supplied through sources that are finite and, at the current usage rates, will be consumed shortly. The high energy demand and pollution problems caused by the widespread use of fossil fuels make it increasingly necessary to develop renewable energy sources of limitless duration with smaller environmental impact than the traditional energy sources.</p><p>Three fuels – rapeseed methyl ester (RME), Fischer-Tropsch (FT) diesel and FT jet fuel – derived from biomass, coal or gas were evaluated in this project. The fuel properties evaluated are in

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22

Alkadee, Dareen. "Techniques de réduction et de traitement des émissions polluantes dans une machine thermique." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2011. http://tel.archives-ouvertes.fr/tel-01005123.

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Cette thèse de doctorat, a consisté, dans une première partie, à introduire d'une part, la notion de l'analyse du cycle de vie " ACV " et celle des biocarburants. D'autre part, à présenter l'intérêt d'appliquer une ACV sur des biocarburants afin de valoriser leurs bilans énergétiques et analyser leurs impacts environnementaux face aux carburants conventionnels. Dans une deuxième partie, nous avons comparé, d'un point de vue énergétique et environnemental, 3 scénarios de production d'électricité : 2 scénarios de cogénération (turbine à vapeur et ORC) pour la production d'énergie électrique et t

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23

Rodríguez-Fernández, José, Magín Lapuerta, and Jesús Sánchez-Valdepeñas. "Regeneration of diesel particulate filters: Effect of renewable fuels." Elsevier, 2016. https://publish.fid-move.qucosa.de/id/qucosa%3A73233.

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Current trends in diesel transport anticipate that in the upcoming future a range of renewable fuels will be necessary to comply with emission and sustainability legislations. Exhaust after-treatment devices such as diesel particulate filters –DPFs– will have to operate satisfactorily with this pool of biofuels. In particular, DPF regeneration is crucial to cut the fuel penalty and guarantee an acceptable lifetime for this device. In the present work, an automotive diesel engine was run with fossil fuel and three renewable fuels: a conventional biodiesel, a fuel manufactured through Fischer-Tr

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Juliato, Angelo. "Análise da influência de diferentes misturas de biodiesel no desempenho e emissões de poluentes de um motor diesel agrícola." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/11/11148/tde-05032007-153037/.

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Existem motivações de ordem ambiental e energética para que combustíveis renováveis sejam cada vez mais utilizados. O biodiesel é uma das alternativas renováveis à utilização de óleo diesel de origem fóssil, e sua utilização tem crescido no mundo. No Brasil, existe uma propensão muito positiva para o cultivo de oleaginosas, e o biodiesel aparece como proposta de solução ambiental, energética e social. A utilização de biodiesel no Brasil tem sido crescente desde 2004 e torna-se-á compulsória a partir de 2008. Nas lavouras não é diferente, e a utilização do biodiesel no maquinário agrícola já é

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Bueno, Andre Valente. "Analise da operação de motores diesel com misturas parciais de biodiesel." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263483.

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Orientadores : Luiz Fernando Milanez, Jose A. Velasquez<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-08-06T09:13:18Z (GMT). No. of bitstreams: 1 Bueno_AndreValente_D.pdf: 1858642 bytes, checksum: 5d8ef42f35d6898a67cb77a3c73c0b7d (MD5) Previous issue date: 2006<br>Resumo: As conseqüências da adição de biodiesel ao óleo diesel foram estudadas estabelecendo-se relações de causa e efeito entre o desempenho do motor e os processos de combustão e formação de mistura. Foram incluídos, nesta discussão, aspectos como emi

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Ferreira, Leonardo Leandro. "Flexibilidade na utilização de diesel ou biodiesel: uma abordagem utilizando a teoria de opções reais." reponame:Repositório Institucional do FGV, 2007. http://hdl.handle.net/10438/6688.

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Submitted by Leonardo Leandro Ferreira (leonardo_ferreira81@hotmail.com) on 2010-06-17T02:31:50Z No. of bitstreams: 1 Leonardo Leandro Ferreira - Flexibilidade na utilização de Biodiesel.pdf: 343612 bytes, checksum: f5e0718a06fb1812a6e104fb348d3154 (MD5)<br>Approved for entry into archive by Vitor Souza(vitor.souza@fgv.br) on 2010-06-17T14:12:47Z (GMT) No. of bitstreams: 1 Leonardo Leandro Ferreira - Flexibilidade na utilização de Biodiesel.pdf: 343612 bytes, checksum: f5e0718a06fb1812a6e104fb348d3154 (MD5)<br>Made available in DSpace on 2010-06-18T12:28:57Z (GMT). No. of bitstreams: 1 Le

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Bernesson, Sven. "Farm-scale production of RME and ethanol for heavy diesel engines : with emphasis on environmental assessment /." Uppsala : Dept. of Biometry and Engineering, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a497.pdf.

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Barbosa, Ana Lúcia Paschoa Botelho Ferreira [UNESP]. "Diesel, biodiesel de mamona e de soja: desgaste do motor de trator agrícola em operações de preparo de solo." Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/100858.

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Made available in DSpace on 2014-06-11T19:31:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-04-19Bitstream added on 2014-06-13T20:01:30Z : No. of bitstreams: 1 barbosa_alpbf_dr_jabo.pdf: 1943668 bytes, checksum: 91a345c82b811b9d969419bf9d45841d (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>Valtra do Brasil<br>O uso de biocombustíveis deverá consolidar-se ao longo dos próximos anos. De um sonho de ambientalistas há décadas, adquiriu recentemente o status de real agente redutor das emissões de gases tóxicos. O presente trabalho teve por objetivo ava

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Almeida, Antônio Fabrício de. "Desempenho de grupo motor gerador alimentado com misturas de óleo residual de frituras e diesel sob cargas variadas." Universidade Federal Rural do Semi-Árido, 2016. http://bdtd.ufersa.edu.br:80/tede/handle/tede/627.

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Submitted by Lara Oliveira (lara@ufersa.edu.br) on 2016-11-18T15:46:08Z No. of bitstreams: 1 BlakeCDM_TESE.pdf: 4892316 bytes, checksum: 86d0db1f3948e83dab7334504ce8a41f (MD5)<br>Approved for entry into archive by Vanessa Christiane (referencia@ufersa.edu.br) on 2017-01-24T14:47:05Z (GMT) No. of bitstreams: 1 BlakeCDM_TESE.pdf: 4892316 bytes, checksum: 86d0db1f3948e83dab7334504ce8a41f (MD5)<br>Approved for entry into archive by Vanessa Christiane (referencia@ufersa.edu.br) on 2017-02-15T15:00:01Z (GMT) No. of bitstreams: 1 BlakeCDM_TESE.pdf: 4892316 bytes, checksum: 86d0db1f3948e83dab7334504ce

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May-Carle, Jean-Baptiste. "Ethanol et moteur Diesel : mécanismes de combustion et formation des polluants." Phd thesis, Université d'Orléans, 2012. http://tel.archives-ouvertes.fr/tel-00843644.

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Les mélanges GtL/EMHC/éthanol ont un potentiel important comme carburant alternatif pour moteur Diesel.Néanmoins, l'utilisation de ce type de biocarburant en moteur Diesel nécessite une connaissance précise de la cinétiqued'oxydation de ses différents constituants.Une étude bibliographique approfondie a permis de sélectionner quatre espèces modèles représentatives des mélangesGtL/EMHC/éthanol : le n-décane, l'iso-octane, l'octanoate de méthyle et l'éthanol. L'oxydation de mélanges de cesespèces modèles a ensuite été étudiée en réacteur auto-agité à haute pression (10 atm), pour trois richesses

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Conconi, Charles Corrêa. "Avaliação físico-química e o potencial de desempenho do farnesano, biodiesel de soja, diesel fóssil e suas misturas por meio da energia de ativação e da correlação com as emissões em motores diesel." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-26092016-184640/.

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Nos últimos anos o principal desafio da humanidade foi a substituição total ou parcial dos combustíveis fósseis que são responsáveis pelas mudanças climáticas e contribuem para a formação dos gases do efeito estufa. Como alternativa, os combustíveis renováveis - denominados biocombustíveis - têm se tornado uma alternativa viável. Este trabalho investigou o comportamento térmico e a energia de ativação de dois biocombustíveis (farnesano e biodiesel de soja) e suas misturas com diesel fóssil. Além disso, foram feitos estudos comparativos de comportamento térmico e energia de ativação entre todos

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Sala, José Antonio. "DESEMPENHO DE UM MOTOR DIESEL DE INJEÇÃO INDIRETA EM FUNÇÃO DA VARIAÇÃO DO TEOR DE B IODIESEL." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/7506.

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Due to the current world scenery of energy, the biodiesel presents a great potential as option to consumption of fuels of the finite sources. The largest use of the biodiesel in the world is with the methyl ester of soybean oil, due to the production scale. In general its use happens in form of blends with diesel oil in different rates. This work of research shows the influence of different levels of biodiesel blends and diesel oil. They were tested using a dynamometer hydraulic bench for evaluation of a diesel engine of 4 times with indirect injection, naturally aspirated. The fuels used were

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Duarte, Aires. "Dimensionamento de plantas Biomass-to-Liquids para produção de óleo diesel sintético no Brasil." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/86/86131/tde-26022014-101501/.

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Há uma demanda global pelo abastecimento de combustíveis veiculares menos poluentes, tanto por questões energéticas quanto sócio-ambientais. Uma potencial alternativa, que traduz a possibilidade de um biocombustível sem as limitações da Primeira Geração, é a rota tecnológica conhecida como Biomass-to-Liquids (BTL) que, através da gaseificação e da síntese Fischer-Tropsch, possibilita a obtenção de biocombustíveis líquidos, como o óleo diesel sintético, provenientes da biomassa moderna, nesse estudo, a biomassa lignocelulósica. Para a produção em escala comercial de um biocombustível da Segunda

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Kotze, Johan. "A comparative study on the performance of biodiesel in a modern 1.9L turbo diesel engine." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4293.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: This thesis comprises of the testing and evaluation of a modern diesel engine running on both biodiesel and mineral diesel on the upgraded Bio-fuels Testing Facility (BTF) at Stellenbosch University. The project was motivated by the need to install a modern diesel engine onto the existing BTF test rig for biodiesel testing. In this project, the BTF was re-designed to support a new Volkswagen 1.9L TDI engine. The capabilities of the BTF were then expanded further by the implementatio

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Machado, Paulo Romeu Moreira. "ÉSTERES COMBUSTÍVEIS EM MOTOR DE CICLO DIESEL SOB CONDIÇÕES DE PRÉ-AQUECIMENTO E VARIAÇÃO NO AVANÇO DE INJEÇÃO." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/3568.

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The renewed interest in energy for biomass is supported by the need for different energy sources and the need to protect the environment. Recently, because of increases in crude oil prices, limited resources of fossil oil and environmental concerns there has been renewed focus on vegetable oils and animal fats to make a biodiesel fuel. What is known as biodiesel (methyl or ethyl esters) is a vegetable oil or animal fat chemically treated to replace traditional diesel fuel. Performance parameters and exhaust emissions of a diesel engine fuelled with sunflower and beef tallow ethyl esters and a

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Ahlgren, Serina. "Crop production without fossil fuel : production systems for tractor fuel and mineral nitrogen based on biomass /." Uppsala : Dept. of Energy and Technology, Swedish University of Agricultural Sciences, 2009. http://epsilon.slu.se/200978.pdf.

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Hakka, Mohammed Hichem. "Étude de l'oxydation en phase gazeuse de composants des gazoles et des biocarburants diesel." Thesis, Vandoeuvre-les-Nancy, INPL, 2010. http://www.theses.fr/2010INPL001N/document.

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En raison de la complexité de leur composition, l’étude de l’oxydation des gazoles et des carburants biodiesel nécessite de choisir des molécules modèles représentant ces mélanges. Dans ce contexte nous avons sélectionné deux molécules pouvant représenter les gazoles : le n-décane, souvent considéré comme molécule modèle des paraffines contenues dans les gazoles, et le n-hexadécane, molécule de référence pour l’estimation de l’indice cétane, ainsi que deux molécules représentant les carburants biodiesel : le palmitate de méthyle (C17H34O2, ester méthylique saturé) et l’oléate de méthyle (C19H3

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Cosseron, Anne-Flore. "Evaluation et traitement des polluants émis par un moteur thermique fonctionnant avec des biocarburants." Phd thesis, Université de Haute Alsace - Mulhouse, 2012. http://tel.archives-ouvertes.fr/tel-00860233.

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Les biocarburants présentent une alternative prometteuse à l'utilisation de carburants fossiles. Cependant, l'augmentation de la quantité de biocarburants introduite dans les carburants nécessite de connaître leur impact sur les émissions de polluants. Le travail réalisé lors de cette thèse peut être décrit en deux parties : La première traite de l'évaluation des émissions de polluants réglementés et non réglementés émis par la combustion de biocarburants dans un moteur diesel. Différents biocarburants ont été testés : des esters méthyliques d'huile de soja et de colza, des esters éthyliques d

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Monsalve, Serrano Javier. "Dual-fuel compression ignition: towards clean, highly efficient combustion." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/75109.

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The more and more stringent emissions regulations, together with the greater fuel economy demanded by vehicle users, impose a clear objective to researchers and engine manufacturers: look for the maximum efficiency with the minimum pollutant emissions levels. The conventional diesel combustion is a highly efficient process, but also leads to high levels of NOx and soot emissions that require using aftertreatment systems to reduce the final levels released to the environment. Since these systems incur in higher costs of acquisition and operation of the engine, the scientific community is worki

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Eriksson, Erik. "The potential for forestry to reduce net CO₂ emissions /." Uppsala : Dept. of Bioenergy, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/2006103.pdf.

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Juntarachat, Niramol. "Utilisation de mesures de points critiques pour la caractérisation de nouveaux réfrigérants et la modélisation d'un procédé de synthèse de biodiesel." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0026/document.

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La connaissance des propriétés critiques des mélanges binaires est importante pour la conception et le développement des procédés des industries chimiques, mais également, pour l'amélioration et l'extension des modèles thermodynamiques prédictifs. Cependant, des données expérimentales critiques liquide - vapeur de mélanges binaires sont relativement rare dans la littérature. C'est la raison pour laquelle, nous avons acquis un nouvel appareil permettant de mesurer les points critiques de corps purs et de mélanges. Dans une première étape, nous avons mis au point et validé le protocole expérimen

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Ledier, Constantin. "Application de la LIF de molécules aromatiques au dosage de carburants fossiles et biocarburants." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00661595.

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Les industries automobile et aéronautique sont confrontées dans le futur proche à une raréfaction des carburants fossiles, ainsi qu'au problème de pollution de l'environnement émis par les systèmes propulsifs. Pour s'affranchir de ces problèmes, l'utilisation de carburants alternatifs censés apporter rendement et préservation de l'environnement, s'est considérablement développée ces derniers temps. Cependant, leurs impacts sur la pollution, consommation et rendement de combustion ne sont toujours pas clairement établis. En particulier, il est nécessaire de quantifier leurs effets sur les phéno

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Kumari, Namrata. "Exploiting Local Algal Diversity for Bio-Diesel Production." Thesis, 2017. http://ethesis.nitrkl.ac.in/8688/1/2017_PhD_512CH1007_NKumari.pdf.

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Algae is proven potential resources for eco-friendly bio-diesel production. But research efforts are still required for worthwhile results. The present study aims to utilize locally available algae biomass resources for bio-diesel production. The samples were collected from the air, water depositories and soil within the Institute campus. Further purification, culture, morphological identification, preservation, lipid extraction, transesterification and bio-diesel properties estimation were also conducted. In the first set of experiment, water strains were collected, isolated up to the molecu

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Beal, Colin McCartney. "Constraints on algal biofuel production." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-05-2775.

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The aspiration for producing algal biofuel is motivated by the desire to replace conventional petroleum fuels, produce fuels domestically, and reduce greenhouse gas emissions. Although, in theory, algae have the potential to produce a large amount of petroleum fuel substitutes and capture carbon emissions, in practice, profitable algal biofuel production has proven quite challenging. This dissertation characterizes the production pathways for producing petroleum fuel substitutes from algae and evaluates constraints on algal biofuel production. Chapter 8 provides a summary of the entire diss

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Lin, Yi-hui, and 林宜暉. "The air pollution and the power analysis of Diesel engine with Biofuel." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/95749907334035179093.

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碩士<br>國立中正大學<br>機械工程所<br>95<br>This research aims at the existing diesel engine, carries on lives the nature diesel oil, the mix to live the nature diesel oil as well as the diesel oil and so on power gauge of experiment three fuel, and under the hypothesis speed by engine revs and the load, the change blow injection angle, obtains the engine dynamic output performance and the exhaust gas discharge combustion product gas density, obtains air of source of pollution the improvement emissions. The power gauge use oil quality characteristic obtains B20 after the gauging result the fresh nature d

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Kuo, chih-hsin, and 郭志信. "The Combustion Characteristic in Diesel Engine for Pyrolysis Biofuel of Waste Tire." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/36616116716206164335.

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碩士<br>國立中正大學<br>機械工程所<br>98<br>The main purpose of this research project aims to investigate the combustion characteristics of Diesel blended with different ratio of Tyre Pyrolysis Oil (TPO) in a diesel engine. Researchers set up a combustion chamber and a four-stroke diesel engine with a dynamometer, observing its fuel-air ratio change and the concentration of emission gas, and explored the possibility of utilizing TPO as an alternative to diesel engine. In this study, the combustion characteristics of Biodiesel and Diesel blended with different ratio of TPO were closely examined. In the exp

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Chang, Kai-Jei, and 張凱捷. "Investigation on the Burning Behavior of Biodiesel/Biofuel/Diesel Binary Fuel Droplet." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/85220835131078023059.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>100<br>This research investigate droplets combustion by free droplet method with flat burner. The experiment mainly observed the ignition delay, burning time, normalized explosion diameter, burning rate of the fuel. And the micro-explosion phenomenon is recorded by the high speed camera. The fuel in this research are diesel, biodiesel, biofuel, naphtha, methanol, ethanol, 2-propanol. The results show that adding methanol and ethanol can reduce the production of soots and make the micro-explosion happen, reducing the burning time also increasing the burning rate

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Lai, Ming-Da, and 賴明達. "Single Droplet Behavior in a Hot Environment and Combustion Characteristics of a Diesel Engine Using Liquid Biofuel/Diesel Blends." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/38265450302455271917.

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碩士<br>崑山科技大學<br>機械工程研究所<br>104<br>Heat behaviors of a single droplet of castor oil/diesel blends were examined using a suspended-droplet heating device. The castor oil used in the experiment was produced from the cold pressing process of castor seeds. Ethanol has a purity of 99.5%. Diesel employed was petroleum diesel. The heating temperature (environment temperature) and the mixing ratio of castor oil/diesel (or ethanol/diesel) blends were varied in the experiment. The vaporization, expansion, bubbling, ejecting, swelling and microexplosion were recorded by a high-speed video system. Meanwhil

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Wang, Shengfu, and 王聖夫. "The Study Fuel Injection Timing in Diesel Engine for Pyrolysis Biofuel of Waste Whee." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/26496280570567025490.

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碩士<br>國立中正大學<br>機械工程學系暨研究所<br>99<br>This paper to tires in the cracking furnace, low temperature below 350 ℃ in the cracking gases generated by the condensation of the resulting tire pyrolysis oil, in two different proportions of commercial diesel (D100) mix, its called T10, T20 bio-oil, diesel engines do real vehicle dynamometer test, known single-cylinder fuel injection quantity and injection angle from m_f1 crank angle θ_A to θ_D, atomized oil droplets to establish θ_A to θ_B mode, when the starting point of spontaneous combustion occurred θ_B the establishment of atomized droplets burning

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Pacheco, Nuno Miguel Freitas. "Teste de motor diesel com biocombustíveis." Master's thesis, 2013. http://hdl.handle.net/1822/28227.

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Dissertação de mestrado integrado em Engenharia Mecânica<br>Este trabalho tem por objetivo testar o funcionamento de um motor diesel, quando alimentado com biocombustível (biodiesel e/ou outros), de modo a verificar as suas características em termos de potência, consumos, e de emissões gasosas no funcionamento do motor, e do veículo. Num estudo inicial sobre o estado da arte, após uma breve descrição do processo de produção, são analisadas as principais características dos combustíveis bem como o efeito da sua utilização no motor, designadamente no seu desempenho, nos consumos, a compatib

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