Download or read book Impacts of Ester s Carbon Chain Length and Concentration on Sooting Propensities and Soot Oxidative Reactivity Application to Diesel and Biodiesel Surrogates written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Transport Biofuels written by Cheng Tung Chong and published by Elsevier. This book was released on 2024-09-18 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Transport Biofuels: Production, Economics, and Sustainability provides a comprehensive review of the latest in the global production, economics, and sustainability of advanced transport biofuels. Drawing upon the latest developments in academia and industry globally, the book reviews biofuels policy and the technoeconomics of biofuels production. The technical considerations in the combustion of biofuels are discussed alongside the latest lab-scale and industrial-level combustion property testing using biofuels and biojet fuels. Finally, a lifecycle analysis of biofuel production is conducted related to the sustainability issues in production. This is an invaluable review of the current state of the biofuels industry, policies, technologies, and economic and sustainability issues related to biofuels applications that will be of interest to graduate students and researchers involved in the development and implementation of alternative fuels in the transportation industry. The book will also be of interest to professional engineers and policymakers working in the automotive industry and involved in the application of alternative fuels. Synthesizes the latest data on global biofuel production and consumption, biofuel emissions, projection of growth of biofuel production, trends in biofuel production based on the latest industrial reports, and academic reviews Analyzes global trends in GHG emissions of biofuels usage in the transportation sector Compares biofuel policy across different regions, including industrial initiatives in promoting sustainable biofuels Presents state-of-the-art technology in sustainable biofuel production, emerging technology of fuel production from different biomass, and an overview of current biofuel production worldwide
Download or read book Impacts of Oxygenated Compounds Concentration on Sooting Propensities and Soot Oxidative Reactivity Application to Diesel and Biodiesel Surrogates written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Renewable Fuels written by Jacqueline O'Connor and published by Cambridge University Press. This book was released on 2022-12-15 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on a critical aspect of the future clean energy system - renewable fuels - this book will be your complete guide on how these fuels are manufactured, the considerations associated with utilising them, and their real-world applications. Written by experts across the field, the book presents many professional perspectives, providing an in-depth understanding of this crucial topic. Clearly explained and organised into four key parts, this book explores the technical aspects written in an accessible way. First, it discusses the dominant energy conversion approaches and the impact that fuel properties have on system operability. Part II outlines the chemical carrier options available for these conversion devices, including gaseous, liquid, and solid fuels. In the third part, it describes the physics and chemistry of combustion, revealing the issues associated with utilizing these fuels. Finally, Part IV presents real-world case studies, demonstrating the successful pathways towards a net-zero carbon future.
Download or read book Impact of Oxygenated Fuels on Sooting Tendency and Soot Oxidative Reactivity with Application to Biofuels written by Eduardo Jose Barrientos Betancourt and published by . This book was released on 2014 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thermal Decomposition of Methyl Esters in Biodiesel Fuel written by Ming Chai and published by . This book was released on 2012 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiesel continues to enjoy increasing popularity. However, recent studies on carbonyl compounds emissions from biodiesel fuel are inconclusive. Emissions of carbonyl compounds from petroleum diesel fuels were compared to emissions from pure biodiesel fuels and petroleum-biodiesel blends used in a non-road diesel generator. The concentration of total carbonyl compounds was the highest when the engine was idling. The carbonyl emissions, as well as ozone formation potential, from biodiesel fuel blends were higher than those emitted from petroleum diesel fuel. The sulfur content of diesel fuel and the source of biodiesel fuel were not found to have a significant impact on emissions of carbonyl compounds. Mechanism parameters of the thermal decomposition of biodiesel-range methyl esters were obtained from the results of thermal gravimetric analysis (TGA). The overall reaction orders are between 0.49 and 0.71 and the energies of activation are between 59.9 and 101.3 kJ/mole. Methyl esters in air have lower activation energies than those in nitrogen. Methyl linoleate has the lowest activation energy, followed by methyl oleate, and methyl stearate. The pyrolysis and oxidation of the three methyl esters were investigated using a semi-isothermal tubular flow reactor. The profiles of major products versus reaction temperature are presented. In the pyrolysis of methyl stearate, the primary reaction pathway is the decarboxylic reaction at the methyl ester functional group. Methyl oleate's products indicate more reactions on its carbon-carbon double bond. Methyl linoleate shows highest reactivity among the three methyl esters, and 87 products were detected. The oxidation of three methyl esters resulted in more products in all compound classes, and 55, 114, and 127 products were detected, respectively. The oxidation of methyl esters includes decarboxylation on ester group. The methyl ester's carbon chain could be oxidized as a hydrocarbon compound and form oxidized esters and unsaturated esters, which have been observed in methyl ester's oxidation products. The oxidation of methyl stearate, methyl oleate and methyl linoleate produces 16, 28 and 34 types of carbonyl compounds, respectively. The unsaturated methyl ester forms more carbonyl compounds compared to the saturated methyl ester, which indicates the formation of carbonyl compounds might be more related to the unsaturated carbon bond rather than the methyl ester group. Good agreement between results for total carbon (TC) generally has been found, but the organic and elemental carbon (OC and EC) fractions determined by different methods often disagree. Lack of reference materials has impeded progress on method standardization and understanding method biases. As part of this dissertation, uniform carbon distribution for the filter sets is prepared by using a simply aerosol generation and collection method. The relative standard deviations for the mean TC, OC, and EC results reported by the seven laboratories were below 10%, 11% and 12% (respectively). The method of filter generation is generally applicable and reproducible. Depending on the application, different filter loadings and types of OC materials can be employed. Matched filter sets prepared by this approach can be used for determining the accuracy of various OC-EC methods and thereby contribute to method standardization.
Download or read book Low Temperature Oxidation of Biodiesel Surrogates in a Motored Engine and the Oxidation Behavior of Soot Generated from the Combustion of a Biodiesel Surrogate in a Diffusion Flame written by Yu Zhang and published by . This book was released on 2010 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Oxidized Biodiesel Fuel on Fatty Acid Methyl Ester Composition and Particulate Matter Emissions From a Light Duty Diesel Engine written by Jack Elliot Reed and published by . This book was released on 2021 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diesel particulate matter (PM) is classified by the EPA as carcinogenic, with the transportation sector largely responsible these emissions within the United States. Biodiesel (B100) is derived from renewable sources, providing similar chemical composition to diesel fuel and is in the current diesel supply up to 5% across the nation. However, biodiesel has an inherent oxidation issue due to the unique mixture of fatty acid methyl ester (FAME) molecules present in the biodiesel that are not in diesel. Biodiesel oxidation can only be delayed, and the inevitable process results in changes to the original fuel composition that may alter emissions profiles. There have been limited studies on the effect of oxidized biodiesel fuel on PM emissions, and with increasing biodiesel production volumes, it is important to assess due to possible adverse human health effects. In this study, it was hypothesized that the change in fuel composition due to oxidation would lead to lower PM emissions because the presence of more fuel oxygen molecules and secondary oxidation products would enhance self-combustion characteristics. In this study, PM mass generated from a light-duty diesel engine running on three different fuel types--pure ("neat") B100 biodiesel, pure B0 diesel, and B20 (20% v/v biodiesel blend with diesel)--was quantified and compared to the PM mass (and concentrations) from repeated emissions testing using artificially oxidized B100 and B20 biodiesel as the fuel source. B100 fuel was heated at 110oC for 5, 10, and 20 hours ("oxidation states" 3, 2, and 1, respectively), verifying the extent of fuel oxidation by building an apparatus (Biodiesel Oxidation Stability Surveyor, BOSS) that quantified the biodiesel fuel's oxidative stability using a method equivalent to standard methods for determining the biofuel's induction period. Induction period increased linearly with time spent under the artificial oxidation conditions. A custom, load-based steady-state modal drive cycle was specially developed for emissions testing each neat and oxidized B100 and B20 fuel type in a light-duty diesel engine dynamometer. Observed changes in PM mass with increased fuel oxidation time occurred only for B20 fuel with a 51 ±13% decrease. Fuel properties such as cetane number, biodiesel content, density, and total aromatics were compared between neat and oxidized B20 and B100 samples. Cetane number increased 7% from 66.8 to 71.7 from B100 neat to B100 OX1 (20hrs) and density increased from 0.709g/cm3 to 0.723g/cm3. Chemical analysis of the biodiesel fuels by gas chromatography mass spectrometry (GCMS) quantified individual FAME compounds to determine key species involved in fuel oxidation. B100 FAME concentration widely varied, however, the B20 fuel blend showed that 20 hour artificial oxidation treatment decreased concentrations of the unsaturated FAMEs for C18:3n3, C18:2 cis-9,12, C18:1 (both cis- and trans- isomers) by 41.7 ±3.5%, 33.25 ±8.8%, and 21.9 ±6.9% relative to their initial concentration in the unoxidized fuel, respectively, in general agreement with literature values. The findings of this study help contribute a better understanding of oxidation effects on biodiesel fuel and link together fuel properties, chemical composition, and particulate emissions whereas most literature excludes detailed analysis of biodiesel fuel composition and associated emissions effects.
Download or read book Modeling Soot Formation in Diesel Engines written by Alumah Arad and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This study focuses on using biodiesel fuel as a means for decreasing diesel engine particulateemissions. Biodiesel is a general name for mixtures of long chain esters, generally methyl or ethylesters, used as alternative fuels in diesel engines. Biodiesel is produced by transesterification, usuallyof vegetable oils, with short chain aliphatic alcohols. Most researchers agree that diesel engineparticulate matter emissions decrease with the addition of biodiesel to diesel fuel.In this study, a new phenomenological model of soot formation and oxidation was developed fordiesel-biodiesel blend combustion."-- From the abstract.
Download or read book The Impact of Carbon Dioxide and Exhaust Gas Recirculation on the Oxidative Reactivity of Soot from Ethylene Flames and Diesel Engines written by Khalid O. Al-Qurashi and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diesel Particulate Filter Technology written by Timothy V Johnson and published by SAE International. This book was released on 2007-03-28 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Until recently, the complexity of the Diesel Particulate Filter (DPF) system has hindered its commercial success. Stringent regulations of diesel emissions has lead to advancements in this technology, therefore mainstreaming the use of DPFs in light- and heavy-duty diesel filtration applications. This book covers the latest and most important research in DPF systems, focusing mainly on the advancements of the years 2002-2006. Editor Timothy V. Johnson selected the top 29 SAE papers covering the most significant research in this technology.
Download or read book Structural Effects of Biodiesel on Soot Volume Fraction in a Laminar Co flow Diffusion Flame written by Jason Weingarten and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistics in Plain English written by Timothy C. Urdan and published by Psychology Press. This book was released on 2001 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents statistical concepts and techniques in simple, everyday language to help readers gain a better understanding of how they work and how to interpret them correctly. Each self-contained chapter features a description of the statistic including how it is used and the information it provides, how to calculate the formula, the strengths and weaknesses of each technique, the conditions needed for its use, and an example that uses and interprets the statistic. A glossary of terms and symbols is also included along with an Interactive CD with PowerPoint presentations and problems and solutions for each chapter. This brief paperback is an ideal supplement for statistics, research methods, or any course that uses statistics, or as a handy reference tool to refresh one's memory about key concepts. The actual research examples are from a variety of fields, including psychology and education.
Download or read book Elliptic and Parabolic Problems written by Catherine Bandle and published by Springer Science & Business Media. This book was released on 2006-01-17 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Haim Brezis has made significant contributions in the fields of partial differential equations and functional analysis, and this volume collects contributions by his former students and collaborators in honor of his 60th anniversary at a conference in Gaeta. It presents new developments in the theory of partial differential equations with emphasis on elliptic and parabolic problems.
Download or read book Surface Intermediates Mechanism and Reactivity of Soot Oxidation written by Shazam Williams and published by . This book was released on 2008 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Factors that may govern diesel particulate matter (DPM) oxidation at low temperatures (∼200°C) were studied using reactivity and TP-ToFSIMS analysis. Best-case scenarios that give maximum gasification rates were determined for DPM impregnated with KOH and non-catalyzed DPM using temperature programmed oxidation and isothermal experiments. Conditions of intimate catalyst-carbon contact (K/C molar ratio=1/50) and high NO2 concentrations (1%) to improve the reactivity of the carbon reactive sites were unable to meet the steady state gasification rate needed for particulate filter regeneration for a modern diesel engine at 200°C. Oxygen-free thermal annealing (>500°C) caused reactivity losses of a maximum of 40% that correspond to changes to surface morphology and/or concentration of oxygen-containing functional groups.TP-ToFSIMS identified surface functional group changes with temperature on non-dosed and NOX pre-dosed (1.5%NO, 1%NO2, 4.5%O 2, balance helium) diesel soot and sucrose char. Detailed analysis of the NOX dosed sucrose char spectra using both inspection and principal component analysis techniques revealed that the 1200 ion fragments created could be reduced to five sets of ions that are chemically and kinetically distinct. These sets presumably represent surface functional groups on the carbon. For example, Set IV may represent carboxylic acid, lactone, or carboxylic anhydride functional groups. Based on these results a mechanism for the surface reaction of NO2 with carbon under vacuum conditions was postulated. At temperatures less than 200°C the ion fragments contain primarily carbon-NO 2 type ions. As temperature increases between 200 and 400°C the ion fragments are primarily carbon-NO and carbon-N type fragments. At higher temperatures (>500°C) the surface is enriched with nitrogen containing functional groups. A surface reaction mechanism is proposed where NO 2 is bonded to an armchair site and with increasing temperatures and molecular rearrangements the N is incorporated into the carbon ring. The initial surface composition of NOx containing functional groups changes within the area of relevance of low temperature soot regeneration (i.e. between 25° and 200°C). Further studies are needed to understand the effect of N-incorporation on carbon reactivity. No rate processes either in reactor studies or based on surface functional groups met the rate criteria for low temperature DPM oxidation.
Download or read book Combustion Generated Fine Carbonaceous Particles written by Andrea D'Anna and published by KIT Scientific Publishing. This book was released on 2014-08-13 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soot is of importance for its contribution to atmospheric particles with their adverse health impacts and for its contributions to heat transfer in furnaces and combustors, to luminosity from candles, and to smoke that hinders escape from buildings during fires and that impacts global warming or cooling. The different chapters of the book adress comprehensively the different aspects from fundamental approaches to applications in technical combustion devices.
Download or read book Cleaner Combustion written by Frédérique Battin-Leclerc and published by Springer Science & Business Media. This book was released on 2013-09-06 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This overview compiles the on-going research in Europe to enlarge and deepen the understanding of the reaction mechanisms and pathways associated with the combustion of an increased range of fuels. Focus is given to the formation of a large number of hazardous minor pollutants and the inability of current combustion models to predict the formation of minor products such as alkenes, dienes, aromatics, aldehydes and soot nano-particles which have a deleterious impact on both the environment and on human health. Cleaner Combustion describes, at a fundamental level, the reactive chemistry of minor pollutants within extensively validated detailed mechanisms for traditional fuels, but also innovative surrogates, describing the complex chemistry of new environmentally important bio-fuels. Divided into five sections, a broad yet detailed coverage of related research is provided. Beginning with the development of detailed kinetic mechanisms, chapters go on to explore techniques to obtain reliable experimental data, soot and polycyclic aromatic hydrocarbons, mechanism reduction and uncertainty analysis, and elementary reactions. This comprehensive coverage of current research provides a solid foundation for researchers, managers, policy makers and industry operators working in or developing this innovative and globally relevant field.
