Download or read book The Effect of Fatty Acid Composition on Emissions from Biodiesel fueled Diesel Engines written by Kevin Jonathan Schmidt and published by . This book was released on 1995 with total page 192 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 Diesel Combustion and Emissions written by Society of Automotive Engineers and published by . This book was released on 1981 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biodiesel Combustion Performance and Emissions Characteristics written by Semakula Maroa and published by Springer Nature. This book was released on 2020-07-10 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on biodiesel combustion, including biodiesel performance, emissions and control. It brings together a range of international research in combustion studies in order to offer a comprehensive resource for researchers, students and academics alike. The book begins with an introduction to biodiesel combustion, followed by a discussion of NOx formation routes. It then addresses biodiesel production processes and oil feedstocks in detail, discusses the physiochemical properties of biodiesel, and explores the benefits and drawbacks of these properties. Factors influencing the formation of emissions, including NOx emissions, are also dealt with thoroughly. Lastly, the book discusses the mechanisms of pollution and different approaches used to reduce pollutants in connection with biodiesel. Each approach is considered in detail, and diagrams are provided to illustrate the points in line with industry standard control mechanisms.
Download or read book The Biodiesel Handbook written by Gerhard Knothe and published by Elsevier. This book was released on 2015-08-13 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this invaluable handbook covers converting vegetable oils, animal fats, and used oils into biodiesel fuel. The Biodiesel Handbook delivers solutions to issues associated with biodiesel feedstocks, production issues, quality control, viscosity, stability, applications, emissions, and other environmental impacts, as well as the status of the biodiesel industry worldwide. Incorporates the major research and other developments in the world of biodiesel in a comprehensive and practical format Includes reference materials and tables on biodiesel standards, unit conversions, and technical details in four appendices Presents details on other uses of biodiesel and other alternative diesel fuels from oils and fats
Download or read book Biodiesel Handling and Use Guidelines written by Karin Shaine Tyson and published by . This book was released on 2006 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biodiesel written by Ayhan Demirbas and published by Springer Science & Business Media. This book was released on 2007-12-20 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiesel: A Realistic Fuel Alternative for Diesel Engines describes the production and characterization of biodiesel. The book also presents current experimental research work in the field, including techniques to reduce biodiesel’s high viscosity. Researchers in renewable energy, as well as fuel engineers, will discover a myriad of new ideas and promising possibilities.
Download or read book Chemistry of Fossil Fuels and Biofuels written by Harold Schobert and published by Cambridge University Press. This book was released on 2013-01-17 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the formation, composition, properties and processing of the principal fossil and biofuels, ideal for graduate students and professionals.
Download or read book Biokerosene written by Martin Kaltschmitt and published by Springer. This book was released on 2017-08-09 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a detailed overview of aspects related to the overall provision chain for biokerosene as part of the global civil aviation business. Starting with a review of the current market situation for aviation fuels and airplanes and their demands, it then presents in-depth descriptions of classical and especially new types of non-edible biomass feedstock suitable for biokerosene provision. Subsequent chapters discuss those fuel provision processes that are already available and those still under development based on various biomass feedstock materials, and present e.g. an overview of the current state of the art in the production of a liquid biomass-based fuel fulfilling the specifications for kerosene. Further, given the growing interest of the aviation industry and airlines in biofuels for aviation, the experiences of an air-carrier are presented. In closing, the book provides a market outlook for biokerosene. Addressing a broad range of aspects related to the pros and cons of biokerosene as a renewable fuel for aviation, the book offers a unique resource.
Download or read book Assessment of the potential of methyl ester production from non edible oils written by Venu Gopal and published by GRIN Verlag. This book was released on 2018-09-12 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Doctoral Thesis / Dissertation from the year 2017 in the subject Environmental Sciences, grade: A, Andhra University (College of engineering), language: English, abstract: Biodiesel as an alternative fuel for diesel engines is becoming increasingly important due to diminishing petroleum reserves and the environmental consequences of exhaust gases from petroleum-fueled engines. Biodiesel, which is made from renewable sources, consists of the simple alkyl esters of fatty acids. As a future prospective fuel, biodiesel has to compete economically with petroleum diesel fuels. A two-step transesterification process (Sequential esterification and transesterification process) was used to prepare methyl ester (biodiesel) from high free fatty acid (FFA) content oils. For the yield of high FFA, two-step acid-base catalyzed method has been developed which consists of acid-catalyzed pretreatment/esterification step to reduce the FFA to less than 1% using H2SO4 as an acid catalyst and transesterification of pretreated oil to biodiesel using alkali catalyst. In the present study, the main focus is being placed to explore the non-edible oil resources like Used Cooking Oil (UCO), Cottonseed oil, Jatropha (Jatropha curcas) oil, Neem(Azadirachta indica) oil as a potential source for biodiesel. Experimental results from enzyme (lipase) catalyzed method for selected oils using influencing parameters such as reaction time and catalyst weight, experimental results from acid-alkaline catalyzed methods using common influencing parameters such as methanol to oil molar ratio, catalyst weight, reaction temperature and reaction time for above-mentioned oils were compared using batch mode. Methyl ester (biodiesel) yield range of 66.20-71.6% was attained for an enzyme-catalyzed method, whereas for acid-alkaline the yield range was 84.4-91.6%. This gives the indication of further refinement in the enzyme-catalyzed transesterification process. However, enzyme-catalyzed biodiesel production has some limitations especially when implemented in industrial scale because of the high cost of enzyme, low reaction rate and enzyme deactivation. As the catalyst, an enzyme is restricted to rigorous reaction condition and the activity loss of lipase. The influencing parameters and absolute results of the analysis give the impression of the superiority of acid-alkaline transesterification method for methyl ester production. In this study, we have selected Used Cooking Oil Methyl Ester (UCOME) and Jatropha Methyl Ester (JME) among the methyl esters of four oils.
Download or read book Biodiesel written by Martin Mittelbach and published by . This book was released on 2004 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vehicle and Engine Investigations with Biodiesel written by A. Hasan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiesel is an environmentally friendly alternative diesel fuel consisting of the alkyl esters of fatty acids which are expected to play a significant role in reducing overall CO2 emissions. Biodiesel is produced commercially by a chemical reaction called transesterification which is a chemical process to lower the viscosity of the vegetable oils. Since Biodiesel is an oxygenated, sulfur free fuel, it typically reduces engine out emissions except for the oxides of nitrogen (NOX). The chemical and physical properties of the fatty acids, as well as the effect of molecular structure, determine the overall properties of biodiesel fuel. Investigations into the impact of FAME properties on diesel engines are highly topical, as higher blends of biodiesel are introduced. The aim of this work is to perform a comprehensive study on the use of biodiesel fuel in production diesel engines, and its impact on emissions, performance and fuel consumption. This thesis has shown that the use of biodiesel fuel reduces the engine out emissions of CO, HC and PM (except at sub-zero temperatures), and causes a slight increase in NOX emissions and fuel consumption compared to baseline diesel fuel. However, the lower exhaust gas temperatures seen when using biodiesel blends leads to reduced catalyst conversion efficiency and an adverse effect on tailpipe emissions. The cylinder pressure and rate of heat release profiles of biodiesel blends are very similar to those of baseline diesel fuel when similar torque is demanded from the engine with relatively similar start of combustion for the main charge. Biodiesel blends show a slightly quicker rise in the rate of heat release and higher peak values compared to baseline diesel fuel. In the case of matched pedal positions, the ignition delay time decreases slightly with biodiesel use at lower engine load conditions compared to baseline diesel fuel. The sensitivity of engine performance and emissions with B25 is more pronounced for EGR rate, rail pressure, and main injection timing variations than for baseline diesel fuel. Finally, an adverse thermal impact of using biodiesel fuel on the performance of diesel oxidation catalyst was observed compared to baseline diesel however, no solid evidence of exhaust gas HC speciation effects was found.
Download or read book Advances in Feedstock Conversion Technologies for Alternative Fuels and Bioproducts written by Majid Hosseini and published by Academic Press. This book was released on 2019-02-23 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Feedstock Conversion Technologies for Alternative Fuels and Bioproducts: New Technologies, Challenges and Opportunities highlights the novel applications of, and new methodologies for, the advancement of biological, biochemical, thermochemical and chemical conversion systems that are required for biofuels production. The book addresses the environmental impact of value added bio-products and agricultural modernization, along with the risk assessment of industrial scaling. The book also stresses the urgency in finding creative, efficient and sustainable solutions for environmentally conscious biofuels, while underlining pertinent technical, environmental, economic, regulatory and social issues. Users will find a basis for technology assessments, current research capability, progress, and advances, as well as the challenges associated with biofuels at an industrial scale, with insights towards forthcoming developments in the industry. Presents a thorough overview of new discoveries in biofuels research and the inherent challenges associated with scale-up Highlights the novel applications and advancements for biological, biochemical, thermochemical and chemical conversion systems that are required for biofuels production Evaluates risk management concerns, addressing the environmental impact of value added bio-products and agricultural modernization, and the risk assessment of industrial scaling
Download or read book Diesel Engines and Biodiesel Engines Technologies written by Freddie L. Inambao and published by BoD – Books on Demand. This book was released on 2022-08-17 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diesel Engines and Biodiesel Engines Technologies explores the conceptual and methodological approaches for the understanding of both diesel engines and biodiesel technologies. The book incorporates reviews of the most significant research findings in both diesel and biodiesel engine production and utilization. It presents technological interventions in biodiesel production and offers a foresight analysis of the perspectives of biodiesel as a future global commodity. It also examines the main challenges that biodiesel will have to overcome in order to play a key role in future energy systems. Furthermore, the book discusses alternative diesel fuels from oils and fats and proposes solutions to issues associated with biodiesel feedstocks, production issues, quality control, viscosity, stability, applications, emissions, and other environmental impacts.
Download or read book Biofuels from non food feed stocks written by Olaf Schröder and published by Cuvillier Verlag. This book was released on 2016-03-10 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of biodiesel is often criticized because of the use of eatable oils like palm oil, soybean oil or rape seed oil. Therefore, researchers from Austria, South Korea, and Germany investigated waste oils from different production processes. In detail, fish oil and rubber tree oil were transesterified with methanol to produce biodiesel. These highly unsaturated biodiesels were tested in a single cylinder diesel engine with respect to their regulated and non-regulated emissions and their health effects. Additionally, the biodiesels were partly hydrogenated to improve the oxidation stability.
Download or read book Biodiesel written by Gisela Montero and published by BoD – Books on Demand. This book was released on 2011-11-16 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book entitled "Biodiesel: Quality, Emissions and By-products" covers topics related to biodiesel quality, performance of combustion engines that use biodiesel and the emissions they generate. New routes to determinate biodiesel properties are proposed and the process how the raw material source, impurities and production practices can affect the quality of the biodiesel is analyzed. In relation to the utilization of biofuel, the performance of combustion engines fuelled by biodiesel and biodiesels blends are evaluated. The applications of glycerol, a byproduct of the biodiesel production process as a feedstock for biotechnological processes, and a key compound of the biorefinery of the future is also emphasized.
Download or read book Production of Biodiesel from Feedstocks with High Free Fatty Acids and Its Effect on Diesel Engine Performance and Emissions written by Mustafa Canakci and published by . This book was released on 2001 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pilot plant was successfully constructed and was shown to be capable of processing rendered fats containing 40% free fatty acids. After preparing a sufficient amount of biodiesel from rendered animal fats and restaurant waste oils, the impact of the biodiesel on diesel engine exhaust emissions and engine performance was evaluated and compared to No. 2 diesel fuel and soybean oil methyl ester. The methyl esters produced from yellow grease gave nearly the same thermal efficiency but higher fuel consumption compared with No. 2 diesel fuel. At the operating condition studied, the biodiesel produced 17.77% and 46.27% lower CO and HC emissions, respectively, than No. 2 diesel fuel. The Bosch Smoke Number for biodiesel from yellow grease was 64.21% less than with No. 2 diesel fuel. The methyl esters had 11.60% higher NO[Subscript x] emissions than the No. 2 diesel fuel. No significant differences were found in the exhaust emissions and engine performance between the biodiesel produced from yellow grease and biodiesel from soybean oil.
