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Author: Kamal Hadidi Publisher: ISBN: Category : Languages : en Pages : 10
Book Description
Bio-mass, as a renewable resource can potentially be converted into economically attractive fuels for transportation uses. Several processes have been considered for the reformation of biomass into hydrogen. They include fast pyrolysis, catalytic steam reforming, catalytic pyrolysis and supercritical water reforming. However, these technologies can not be used for onboard applications. An alternative approach is to use on-board generation of hydrogen. The plasmatron technology being developed at MIT for reformation of a wide range of fuels into synthesis gas (hydrogen and carbon monoxide) uses special low current plasmas. Vegetable oils and ethanol have been used in a plasmatron reformer to generate synthesis gas. Corn, canola, and soybean oils and ethanol have been reformed at different oxygen to carbon ratios and at power levels of 700 and 200 watts with a frequency of 200 to 260 kHz. In the case of ethanol, some of the oxygen required for the reformation is provided by the fuel itself. Both homogeneous plasma reforming (non-catalytic) and catalytic plasma reformer have been evaluated. Hydrogen yields of close to 80% have been achieved during catalytic reformation of corn and soybean oils and ethanol. Canola oil catalytic reformation yielded 60% of hydrogen. Other major compounds of the reformat gas are carbon monoxide and light hydrocarbons such as CH4 and C2H4.
Author: Kamal Hadidi Publisher: ISBN: Category : Languages : en Pages : 10
Book Description
Bio-mass, as a renewable resource can potentially be converted into economically attractive fuels for transportation uses. Several processes have been considered for the reformation of biomass into hydrogen. They include fast pyrolysis, catalytic steam reforming, catalytic pyrolysis and supercritical water reforming. However, these technologies can not be used for onboard applications. An alternative approach is to use on-board generation of hydrogen. The plasmatron technology being developed at MIT for reformation of a wide range of fuels into synthesis gas (hydrogen and carbon monoxide) uses special low current plasmas. Vegetable oils and ethanol have been used in a plasmatron reformer to generate synthesis gas. Corn, canola, and soybean oils and ethanol have been reformed at different oxygen to carbon ratios and at power levels of 700 and 200 watts with a frequency of 200 to 260 kHz. In the case of ethanol, some of the oxygen required for the reformation is provided by the fuel itself. Both homogeneous plasma reforming (non-catalytic) and catalytic plasma reformer have been evaluated. Hydrogen yields of close to 80% have been achieved during catalytic reformation of corn and soybean oils and ethanol. Canola oil catalytic reformation yielded 60% of hydrogen. Other major compounds of the reformat gas are carbon monoxide and light hydrocarbons such as CH4 and C2H4.
Author: Leslie Bromberg Publisher: ISBN: Category : Languages : en Pages : 18
Book Description
Diesel plasmatron reformer technology can provide substantial throughputs without the need of using a catalyst The use of the special plasma facilitates robust non-catalytic conversion of diesel fuel into hydrogen rich gas with hydrogen yields that could be sufficient for NOx trap regeneration applications. Higher yields can be obtained with the use of a catalyst. Plasmatron reformers could also be used for manufacturing of ethene, which could be useful as a selective reducing agent. In addition, plasmatron reformer technology can be used for converting a range of biofuels into hydrogen rich gas. These fuels include various oils. This capability may improve the prospects for use of renewable fuels in a variety of vehicular applications. This paper discussed the status of plasmatron diesel fuel reformers and possible applications to diesel engine exhaust aftertreatment. Keywords: reforms; hydrogen; emissions; diesel; biofuels.
Author: Leslie Bromberg Publisher: ISBN: Category : Languages : en Pages : 16
Book Description
(cont.) Both noncatalytic and catalytic (with a catalyst downstream from a homogeneous reforming zone) have been studied. Onboard conversion of biofuels into hydrogen rich gas opens up a range of opportunities for reducing petroleum consumption. The plasmatron response has been determined using real time gas analysis techniques. For cold start, the response of a plasmatron fuel reformer using homogeneous reforming was faster than that from a plasmatron fuel reformer that included a catalyst. In addition, hydrogen production during warm start has also been studied. This mode of operation could be particularly relevant to some aftertreatment applications, where the hydrogen rich gas needs to be produced in short, frequent pulses. Concepts have been developed for optimal regeneration of Diesel Particulate Filters, using hydrogen rich gas. The goal is the simplification of the aftertreatment system, increasing reliability, fuel penalty minimization, and minimization of fuel reformer system requirements.
Author: Zhen Fang Publisher: Springer ISBN: 9401773300 Category : Science Languages : en Pages : 375
Book Description
This book provides state-of-the-art reviews, current research and prospects of producing hydrogen using bio, thermal and electrochemical methods and covers hydrogen separation, storage and applications. Hydrogen produced from biomass offers a clean and renewable energy source and a promising energy carrier that will supplement or replace fossil fuels in the future. The book is intended as a reference work for researchers, academics and industrialists working in the chemical and biological sciences, engineering, renewable resources and sustainability. Readers will find a wealth of information in the text that is both useful for the practical development of hydrogen systems and essential for assessing hydrogen production by bioelectrochemical, electrochemical, fermentation, gasification, pyrolysis and solar means, applied to many forms of biomass. Dr. Zhen Fang is Professor in Bioenergy, Leader and founder of biomass group, Chinese Academy of Sciences, Xishuangbanna Tropical Botanical Garden and is also adjunct Professor of Life Sciences, University of Science and Technology of China. Dr. Richard L Smith, Jr. is Professor of Chemical Engineering, Graduate School of Environmental Studies, Research Center of Supercritical Fluid Technology, Tohoku University, Japan. Dr. Xinhua Qi is Professor of Environmental Science, Nankai University, China.
Author: Leslie Bromberg Publisher: ISBN: Category : Languages : en Pages :
Book Description
The characteristics of plasmatron reformers for the generation of hydrogen rich gas using renewable fuels is discussed. Biodiesel and ethanol have been investigated. Operating as a function of the air/fuel ratio is evaluated, as well as the impact of the plasma.
Author: Publisher: ISBN: Category : Languages : en Pages : 9
Book Description
Substantial progress in engine emission control is needed in order to meet present and proposed regulations for both spark ignition and diesel engines. Tightening regulations throughout the world reflect the ongoing concern with vehicle emissions. Recently developed compact plasmatron fuel converters have features that are suitable for onboard production of hydrogen for both fuel pretreatment and for exhaust aftertreatment applications. Systems that make use of these devices in conjunction with aftertreatment catalysts have the potential to improve significantly prospects for reduction of diesel engine emissions. Plasmatron fuel converters can provide a rapid response compact means to transform efficiently a wide range of hydrocarbon fuels into hydrogen rich gas. They have been used to reform natural gas [Bromberg1], gasoline [Green], diesel [Bromberg2] and hard-to-reform biofuels [Cohn1] into hydrogen rich gas (H2 + CO). The development of these devices has been pursued for the purpose of reducing engine exhaust pollutants by providing hydrogen rich gas for combustion in spark ignition and possibly diesel engines, as shown in Figure 1 [Cohn2]. Recent developments in compact plasmatron reformer design at MIT have resulted in substantial decreases in electrical power requirements. These new developments also increase the lifetime of the electrodes.
Author: Sonil Nanda Publisher: CRC Press ISBN: 1000565629 Category : Science Languages : en Pages : 251
Book Description
Biohydrogen is a promising gaseous biofuel that has prospective applications in combined heat and power, for fuel cells, or as a precursor for chemicals production. Hydrogen can also be converted to liquid hydrocarbon fuels and value-added chemicals through catalytic thermochemical or through biocatalytic biological pathways. This book addresses both the fundamentals as well as advanced new technological research on biohydrogen production by focusing on recent global research with emphasis on the technological, environmental, socioeconomic, and techno-economic aspects. It covers some the important advances in the production and utilization of biohydrogen and its solutions for clean fuel, waste management, waste valorization, reduced greenhouse gas emissions, and climate change mitigation. The book first covers the basic principles, benefits, and challenges concerning both the biological and thermochemical routes for biohydrogen production and then goes on to address topics such as biomass conversion to hydrogen through gasification with a focus on the process parameters, catalytic reforming technologies for hydrogen production concerning various feedstocks, the co-conversion of plastic wastes and biomass into biohydrogen through co-gasification technology, the effect of process parameters on syngas yields through co-gasification; fermentative hydrogen production technologies, the molecular mechanism of hydrogen production and enhancing the yield in hydrogen production by genetic and metabolic engineering, hydrogen production routes through microbial electrolysis, and much more.
Author: JianHua Yan Publisher: Springer ISBN: 9811036594 Category : Technology & Engineering Languages : en Pages : 107
Book Description
This book provides an overview of hydrogen production from renewable resources such as ethanol using plasma or plasma-catalytic technologies. Further, it presents a balanced and comprehensive treatment of the core principles, novel plasma reactors and diagnostics, as well as state-of-the-art plasma energy applications. It brings together technological advances and research on plasma generators and their application in hydrogen production, including plasma-assisted alcohol reforming technology, plasma-catalytic alcohol reforming technology, the alcohol reforming mechanism, models of alcohol reforming for hydrogen production, the energy balance of hydrogen production from ethanol, and a comparison of alcohol reforming assisted by different plasma treatment systems. As such, it offers a valuable reference guide for scientists, engineers and graduate students in the fields of energy and environment, plasma physics and chemistry.
Author: Kamal Hadidi
Author: Kamal Hadidi
Author: Leslie Bromberg
Author: Leslie Bromberg
Author: Zhen Fang
Author: Mojdeh Ashrafi
Author: Leslie Bromberg
Author: 
Author: Sonil Nanda
Author: JianHua Yan
Author: