Cerium Ferrierite Catalyst Systems For Reduction Of Nox In Lean Burn Engine Exhaust Gas

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Cerium-ferrierite Catalyst Systems for Reduction of NOx in Lean Burn Engine Exhaust Gas

Author : Germaine Seijger
Publisher : IOS Press
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Cerium-ferrierite Catalyst Systems for Reduction of NOx in Lean Burn Engine Exhaust Gas by : Germaine Seijger

Download or read book Cerium-ferrierite Catalyst Systems for Reduction of NOx in Lean Burn Engine Exhaust Gas written by Germaine Seijger and published by IOS Press. This book was released on 2002 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents of this Doctoral Dissertation include: NOx emission reduction from lean burn engines, automotive exhaust gas emissions, Reactions of NOx in the atmosphere Engine market share and sales trends, Ferrierite characteristics, synthesis and application, Characteristics of the group of FER framework structures, Screening of silver and cerium exchanged zeolite catalysts for the lean burn reduction of NOx with propene, Hydrocarbon NOx reduction in lean burn exhaust gas over Ce-FER catalysts, Approach to the kinetics of NOx reduction with propene over Ce-H-Ferrierite, In SITU preparation of ferrierite coatings on cordierite honeycomb supports, Concluding remarks

Catalysts, Systems and Methods to Reduce NOX in an Exhaust Gas Stream

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Catalysts, Systems and Methods to Reduce NOX in an Exhaust Gas Stream by :

Download or read book Catalysts, Systems and Methods to Reduce NOX in an Exhaust Gas Stream written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalysts, systems and methods are described to reduce NO.sub.x emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having an SCR catalyst comprising silver tungstate on an alumina support. The emissions treatment system may be used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines. An emissions treatment system may further comprise an injection device operative to dispense a hydrocarbon reducing agent upstream of the catalyst.

Diesel Engine

Author : Saiful Bari
Publisher : BoD – Books on Demand
ISBN 13 : 9535111205
Total Pages : 282 pages
Book Rating : 4.5/5 (351 download)

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Book Synopsis Diesel Engine by : Saiful Bari

Download or read book Diesel Engine written by Saiful Bari and published by BoD – Books on Demand. This book was released on 2013-04-30 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diesel engines, also known as CI engines, possess a wide field of applications as energy converters because of their higher efficiency. However, diesel engines are a major source of NOX and particulate matter (PM) emissions. Because of its importance, five chapters in this book have been devoted to the formulation and control of these pollutants. The world is currently experiencing an oil crisis. Gaseous fuels like natural gas, pure hydrogen gas, biomass-based and coke-based syngas can be considered as alternative fuels for diesel engines. Their combustion and exhaust emissions characteristics are described in this book. Reliable early detection of malfunction and failure of any parts in diesel engines can save the engine from failing completely and save high repair cost. Tools are discussed in this book to detect common failure modes of diesel engine that can detect early signs of failure.

Catalysts For Lean Burn Engine Exhaust Abatement

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (873 download)

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Book Synopsis Catalysts For Lean Burn Engine Exhaust Abatement by :

Download or read book Catalysts For Lean Burn Engine Exhaust Abatement written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The present invention provides a process for catalytically reducing nitrogen oxides in an exhaust gas stream containing nitrogen oxides and a reductant material by contacting the gas stream under conditions effective to catalytically reduce the nitrogen oxides with a catalyst comprising a aluminum-silicate type material and a minor amount of a metal, the catalyst characterized as having sufficient catalytic activity so as to reduce the nitrogen oxides by at least 60 percent under temperatures within the range of from about 200.degree. C. to about 400.degree. C.

NO{sub X} REDUCTION BEHAVIOR OF ALUMINA AND ZEOLITE CATALYSTS IN COMBINATION WITH NON-THERMAL PLASMA.

Author :
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis NO{sub X} REDUCTION BEHAVIOR OF ALUMINA AND ZEOLITE CATALYSTS IN COMBINATION WITH NON-THERMAL PLASMA. by :

Download or read book NO{sub X} REDUCTION BEHAVIOR OF ALUMINA AND ZEOLITE CATALYSTS IN COMBINATION WITH NON-THERMAL PLASMA. written by and published by . This book was released on 2000 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lean burn gasoline and diesel engines provide improved fuel economy when compared to engines operating under stoichiometric fuel/air conditions. At the same time, lean burn and diesel engines present a problem for emission control. Because they operate under oxidizing conditions, the conventional three-way catalyst is not effective in NOx reduction [1,2]. In addition, the wide temperature range of automobile exhaust gases present a challenge for catalyst design. The temperature of exhaust gases from a light duty diesel engine can vary from 150 to 500 C, depending on the operating conditions. To date, a catalyst that operates with high NOx conversion efficiency over the entire operating range has not been found. Non-thermal plasma assisted catalysis has been shown to be a promising technology for NOx reduction in lean burn and diesel exhaust gases [3,4]. The approach exploited in this paper is to use a plasma in combination with several catalysts, each of which are active over unique temperature ranges. It was reported in the literature, that the one of the essential roles of plasma treatment is to oxidize NO to easier reducible NO2 [7]. In this contribution, the other important function of plasma treatment, namely partial oxidation of propylene, will be demonstrated.

Studies of Platinum Dispersion and Catalyst Architecture for Lean NOx Reduction

Author : Bijesh Man Shakya
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (954 download)

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Book Synopsis Studies of Platinum Dispersion and Catalyst Architecture for Lean NOx Reduction by : Bijesh Man Shakya

Download or read book Studies of Platinum Dispersion and Catalyst Architecture for Lean NOx Reduction written by Bijesh Man Shakya and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The combination of NOx storage and reduction (NSR) and selective catalytic reduction (SCR) catalyst is a promising technology for the reduction of NOx emission from the exhaust of lean-burn or diesel engine vehicles. In the combined NSR/SCR system, NH3 generated in LNT during the rich phase is utilized in the SCR for additional NOx conversion. Therefore, the performance of the combined NSR/SCR depends strongly on the NH3 generating function of the NSR catalyst. Earlier studies show that lower Pt dispersion NSR catalysts give higher selectivity to NH3 making them ideal candidates for this particular application. In the first part of the work, we performed experiments on lower Pt dispersion catalysts to gain insights on the mechanistic effects of Pt dispersion on NOx conversion and selectivity. We also developed an improved crystallite-scale model of NSR that explicitly accounts for the crystallite scale gradients of the stored NOx. The calibrated model is able to capture the effects of Pt dispersion, rich phase duration and overall cycle time on cycle-averaged conversion and selectivity trends. In the second part, we carried out a simulation study of dual-layer NSR+SCR monolithic catalyst using (1+1)-D model of catalytic monolith with individually-calibrated global kinetic models. Simulations show that multiple combinations of catalyst loading can attain a given NOx conversion and N2 selectivity, and that there exists a loading of SCR washcoat for a given NSR catalyst for which the NOx conversion is maximum. Simulations of the dual-brick monolith are also performed to analyze the effects of catalyst architecture. Under identical conditions, the simulations show that dual-layer catalyst outperforms the dual-brick largely because of the better utilization of generated NH3. Finally, we performed an optimization study to identify optimal loading and configuration of combined Fe+Cu zeolite catalyst that gives overall high NOx removal efficiency over a broad range of temperature. Simulations suggest that the brick configuration in which Fe- brick is followed by Cu- catalyst is slightly better than dual-layer in which Fe- is coated on top of Cu- architecture. This is attributed to the diffusional limitations in the washcoat that is more pronounced in the dual-layer catalysts.

Chemical Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 2626 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Chemical Abstracts by :

Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2626 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Reverse-flow Oxidation Catalyst with Supplemental Fuel Injectin for Lean-burn Natural Engines

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (614 download)

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Book Synopsis Reverse-flow Oxidation Catalyst with Supplemental Fuel Injectin for Lean-burn Natural Engines by :

Download or read book Reverse-flow Oxidation Catalyst with Supplemental Fuel Injectin for Lean-burn Natural Engines written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research is to demonstrate that the use of a reverse-flow oxidation catalyst reactor (RFOCR), both with and without supplemental fuel injection (SFI), will result in significant reductions of methane (CH4) in a simulated lean-burn natural gas exhaust mixture. Methane reduction is investigated as a function of the directional duration of the exhaust gases through the oxidation catalyst, gas hourly space velocity (GHSV), and exhaust gas temperature. The CH4 catalytic chemical reaction, at an elevated exhaust gas temperature, is an exothermic reaction and elevating the temperature across the catalyst reactor corresponds to an increase in CH4 conversion. Periodically reversing the inlet and outlet exhaust direction through the catalyst traps the heat released from the chemical reaction, raising the overall temperature of the exhaust gas through the RFOCR. This study demonstrates the ability of the RFOCR to trap heat, thereby increasing CH4 oxidation. This ability to trap heat provides a significant advantage over standard unidirectional flow catalytic converters. Additionally, to increase CH4 conversion at relatively low feed temperatures, the injection of a supplemental fuel mixture consisting of carbon monoxide (CO) and hydrogen (H2) was evaluated. The experimental results confirm that, when compared with unidirectional flow, periodically reversing the flow of exhaust mixture through a catalyst reactor can significantly improve CH4 conversion. Results also indicate that the effect of switching time (ST) on CH4 conversion vary significantly with gas hourly space velocity (GHSV) and temperature. Furthermore, results indicate that by introducing supplemental fuel into the feed mixture at low engine operating conditions CH4 conversion is notably improved by elevating the temperature across the catalyst reactor through the combustion of carbon monoxide and hydrogen. However, extended durations of increased CH4 conversion during reverse-flow operations is not possible after supplemental fuel injection is terminated.

Fundamental Aspects of NOx Storage-reduction Catalysts for Automotive Lean Combustion Engines

Author : Marco Piacentini
Publisher :
ISBN 13 :
Total Pages : 220 pages
Book Rating : 4.:/5 (428 download)

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Book Synopsis Fundamental Aspects of NOx Storage-reduction Catalysts for Automotive Lean Combustion Engines by : Marco Piacentini

Download or read book Fundamental Aspects of NOx Storage-reduction Catalysts for Automotive Lean Combustion Engines written by Marco Piacentini and published by . This book was released on 2006 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effect of Hydrocarbon Emissions From PCCI-Type Combustion On The Performance of Selective Catalytic Reduction Catalysts

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Effect of Hydrocarbon Emissions From PCCI-Type Combustion On The Performance of Selective Catalytic Reduction Catalysts by :

Download or read book Effect of Hydrocarbon Emissions From PCCI-Type Combustion On The Performance of Selective Catalytic Reduction Catalysts written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Core samples cut from full size commercial Fe-and Cu-zeolite SCR catalysts were exposed to a slipstream of raw engine exhaust from a 1.9-liter 4-cylinder diesel engine operating in conventional and PCCI combustion modes. Subsequently, the NOx reduction performance of the exposed catalysts was evaluated on a laboratory bench- reactor fed with simulated exhaust. The Fe-zeolite NOx conversion efficiency was significantly degraded, especially at low temperatures (

Catalytic Reduction of NOx Under Lean Conditions

Author :
Publisher :
ISBN 13 :
Total Pages : 81 pages
Book Rating : 4.:/5 (924 download)

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Book Synopsis Catalytic Reduction of NOx Under Lean Conditions by :

Download or read book Catalytic Reduction of NOx Under Lean Conditions written by and published by . This book was released on 1997 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Selective Catalytic Reduction of NOx

Author : Oliver Kröcher
Publisher : MDPI
ISBN 13 : 3038973645
Total Pages : 281 pages
Book Rating : 4.0/5 (389 download)

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Book Synopsis Selective Catalytic Reduction of NOx by : Oliver Kröcher

Download or read book Selective Catalytic Reduction of NOx written by Oliver Kröcher and published by MDPI. This book was released on 2018-12-14 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a printed edition of the Special Issue "Selective Catalytic Reduction of NO_x" that was published in Catalysts

Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts

Author : Isabella Nova
Publisher : Springer Science & Business Media
ISBN 13 : 1489980717
Total Pages : 715 pages
Book Rating : 4.4/5 (899 download)

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Book Synopsis Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts by : Isabella Nova

Download or read book Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts written by Isabella Nova and published by Springer Science & Business Media. This book was released on 2014-03-14 with total page 715 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urea-SCR Technology for deNOx After Treatment of Diesel Exhausts presents a complete overview of the selective catalytic reduction of NOx by ammonia/urea. The book starts with an illustration of the technology in the framework of the current context (legislation, market, system configurations), covers the fundamental aspects of the SCR process (catalysts, chemistry, mechanism, kinetics) and analyzes its application to useful topics such as modeling of full scale monolith catalysts, control aspects, ammonia injections systems and integration with other devices for combined removal of pollutants.

Catalytic Air Pollution Control

Author : Ronald M. Heck
Publisher : John Wiley & Sons
ISBN 13 : 0470275030
Total Pages : 548 pages
Book Rating : 4.4/5 (72 download)

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Book Synopsis Catalytic Air Pollution Control by : Ronald M. Heck

Download or read book Catalytic Air Pollution Control written by Ronald M. Heck and published by John Wiley & Sons. This book was released on 2016-03-07 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: Catalytic Air Pollution Control: Commercial Technology is the primary source for commercial catalytic air pollution control technology, offering engineers a comprehensive account of all modern catalytic technology. This Third Edition covers all the new advances in technology in automotive catalyst control technology, diesel engine catalyst control technology, small engine catalyst control technology, and alternate sustainable fuels for auto and diesel.

Pollutants from Energy Sources

Author : Rashmi Avinash Agarwal
Publisher : Springer
ISBN 13 : 9811332819
Total Pages : 350 pages
Book Rating : 4.8/5 (113 download)

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Book Synopsis Pollutants from Energy Sources by : Rashmi Avinash Agarwal

Download or read book Pollutants from Energy Sources written by Rashmi Avinash Agarwal and published by Springer. This book was released on 2018-11-01 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses different aspects of energy consumption and environmental pollution, describing in detail the various pollutants resulting from the utilization of natural resources and their control techniques. It discusses diagnostic techniques in a simple and easy-to-understand manner. It will be useful for engineers, agriculturists, environmentalists, ecologists and policy makers involved in area of pollutants from energy, environmental safety, and health sectors.

Metal Oxides in Heterogeneous Catalysis

Author : Jacques C. Vedrine
Publisher : Elsevier
ISBN 13 : 0128116323
Total Pages : 620 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Metal Oxides in Heterogeneous Catalysis by : Jacques C. Vedrine

Download or read book Metal Oxides in Heterogeneous Catalysis written by Jacques C. Vedrine and published by Elsevier. This book was released on 2018-01-11 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Oxides in Heterogeneous Catalysis is an overview of the past, present and future of heterogeneous catalysis using metal oxides catalysts. The book presents the historical, theoretical, and practical aspects of metal oxide-based heterogeneous catalysis. Metal Oxides in Heterogeneous Catalysis deals with fundamental information on heterogeneous catalysis, including reaction mechanisms and kinetics approaches.There is also a focus on the classification of metal oxides used as catalysts, preparation methods and touches on zeolites, mesoporous materials and Metal-organic frameworks (MOFs) in catalysis. It will touch on acid or base-type reactions, selective (partial) and total oxidation reactions, and enzymatic type reactions The book also touches heavily on the biomass applications of metal oxide catalysts and environmentally related/depollution reactions such as COVs elimination, DeNOx, and DeSOx. Finally, the book also deals with future trends and prospects in metal oxide-based heterogeneous catalysis. Presents case studies in each chapter that provide a focus on the industrial applications Includes fundamentals, key theories and practical applications of metal oxide-based heterogeneous catalysis in one comprehensive resource Edited, and contributed, by leading experts who provide perspectives on synthesis, characterization and applications

Zeolites and Zeolite-like Materials

Author : Bert Sels
Publisher : Elsevier
ISBN 13 : 0444635149
Total Pages : 475 pages
Book Rating : 4.4/5 (446 download)

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Book Synopsis Zeolites and Zeolite-like Materials by : Bert Sels

Download or read book Zeolites and Zeolite-like Materials written by Bert Sels and published by Elsevier. This book was released on 2016-07-29 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zeolites and Zeolite-like Materials offers a comprehensive and up-to-date review of the important areas of zeolite synthesis, characterization, and applications. Its chapters are written in an educational, easy-to-understand format for a generation of young zeolite chemists, especially those who are just starting research on the topic and need a reference that not only reflects the current state of zeolite research, but also identifies gaps and opportunities. The book demonstrates various applications of zeolites in heterogeneous catalysis and biomass conversion and identifies the endless possibilities that exist for this class of materials, their structures, functions, and future applications. In addition, it demonstrates that zeolite-like materials should be regarded as a living body developing towards new modern applications, thereby responding to the needs of modern technology challenges, including biomass conversion, medicine, laser techniques, and nanomaterial design, etc. The book will be of interest not only to zeolite-focused researchers, but also to a broad scientific and non-scientific audience. Provides a comprehensive review of the literature pertaining to zeolites and zeolite-like materials since 2000 Covers the chemistry of novel zeolite-like materials such as Metal-Organic Frameworks (MOFs), Covalent Organic Frameworks (COFs), hierarchical zeolite materials, new mesoporous and composite zeolite-like micro/mesoporous materials Presents essential information of the new zeolite-like structures, with a balanced coverage of the most important areas of the zeolite research (synthesis, characterization, adsorption, catalysis, new applications of zeolites and zeolite-like materials) Contains chapters prepared by known specialists who are members of the International Zeolite Association