Steady-state and Transient Catalytic Oxidation and Coupling of Methane PDF Download
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Languages : en
Pages : 12
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Book Description
Four papers have been published on mechanisms and site requirements for oxidative coupling of methane to ethane and ethylene and on synthesis of thin catalytic films during fiscal 1993. These publications also describe a unique inhibiting effect of water on the rate of undesired full oxidation pathways during oxidative coupling. Five quarterly reports have been written and submitted during the covered period. These findings and recently reported models of surface and gas phase reactions of methane suggest the use of membrane reactors and of cyclic methane decomposition schemes in order to avoid deleterious full oxidation reactions and to increase C2 yields above 25%. In fiscal 1994, we will proceed with the testing of proton-conducting membranes that we have recently fabricated. We will also continue our emerging effort in cyclic decomposition of methane and scavenging of fragments on supported metal catalysts.
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Publisher:
ISBN:
Category :
Languages : en
Pages : 12
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Book Description
Four papers have been published on mechanisms and site requirements for oxidative coupling of methane to ethane and ethylene and on synthesis of thin catalytic films during fiscal 1993. These publications also describe a unique inhibiting effect of water on the rate of undesired full oxidation pathways during oxidative coupling. Five quarterly reports have been written and submitted during the covered period. These findings and recently reported models of surface and gas phase reactions of methane suggest the use of membrane reactors and of cyclic methane decomposition schemes in order to avoid deleterious full oxidation reactions and to increase C2 yields above 25%. In fiscal 1994, we will proceed with the testing of proton-conducting membranes that we have recently fabricated. We will also continue our emerging effort in cyclic decomposition of methane and scavenging of fragments on supported metal catalysts.
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Category :
Languages : en
Pages : 20
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Book Description
This report covers the time period from October 1 through December 31, 1993. A description of tasks for fiscal year 1994 is included in this report. Highlights and progress of work performed during this quarter is reported in (a) catalytic steam gasification of coals and cokes; (b) oxidative coupling of methane; and (c) synthesis and characterization of catalysts. Attached to this report is a copy of a manuscript submitted to Proceeding of Fuels Technology Contractors Meeting {open_quotes}Steady-State and Transient Catalytic Oxidation and Coupling of Methane{close_quotes} by Heinemann, Iglesia, and Perry.
Author: Wolf
Publisher: Springer Science & Business Media
ISBN: 9401574499
Category : Technology & Engineering
Languages : en
Pages : 556
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Book Description
A reasonable case could be made that the scientific interest in catalytic oxidation was the basis for the recognition of the phenomenon of catalysis. Davy, in his attempt in 1817 to understand the science associated with the safety lamp he had invented a few years earlier, undertook a series of studies that led him to make the observation that a jet of gas, primarily methane, would cause a platinum wire to continue to glow even though the flame was extinguished and there was no visible flame. Dobereiner reported in 1823 the results of a similar investigation and observed that spongy platina would cause the ignition of a stream of hydrogen in air. Based on this observation Dobereiner invented the first lighter. His lighter employed hydrogen (generated from zinc and sulfuric acid) which passed over finely divided platinum and which ignited the gas. Thousands of these lighters were used over a number of years. Dobereiner refused to file a patent for his lighter, commenting that "I love science more than money." Davy thought the action of platinum was the result of heat while Dobereiner believed the ~ffect ~as a manifestation of electricity. Faraday became interested in the subject and published a paper on it in 1834; he concluded that the cause for this reaction was similar to other reactions.
Author: Eduardo E. Wolf
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 566
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Book Description
A reasonable case could be made that the scientific interest in catalytic oxidation was the basis for the recognition of the phenomenon of catalysis. Davy, in his attempt in 1817 to understand the science associated with the safety lamp he had invented a few years earlier, undertook a series of studies that led him to make the observation that a jet of gas, primarily methane, would cause a platinum wire to continue to glow even though the flame was extinguished and there was no visible flame. Dobereiner reported in 1823 the results of a similar investigation and observed that spongy platina would cause the ignition of a stream of hydrogen in air. Based on this observation Dobereiner invented the first lighter. His lighter employed hydrogen (generated from zinc and sulfuric acid) which passed over finely divided platinum and which ignited the gas. Thousands of these lighters were used over a number of years. Dobereiner refused to file a patent for his lighter, commenting that "I love science more than money." Davy thought the action of platinum was the result of heat while Dobereiner believed the ~ffect ~as a manifestation of electricity. Faraday became interested in the subject and published a paper on it in 1834; he concluded that the cause for this reaction was similar to other reactions.
Author: G.F. Froment
Publisher: Elsevier
ISBN: 0080540295
Category : Science
Languages : en
Pages : 663
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Book Description
Reaction Kinetics and the Development and Operation of Catalytic Processes is a trendsetter. The Keynote Lectures have been authored by top scientists and cover a broad range of topics like fundamental aspects of surface chemistry, in particular dynamics and spillover, the modeling of reaction mechanisms, with special focus on the importance of transient experimentation and the application of kinetics in reactor design. Fundamental and applied kinetic studies are well represented. More than half of these deal with transient kinetics, a new trend made possible by recent sophisticated experimental equipment and the awareness that transient experimentation provides more information and insight into the microphenomena occurring on the catalyst surface than steady state techniques. The trend is not limited to purely kinetic studies since the great majority of the papers dealing with reactors also focus on transients and even deliberate transient operation. It is to be expected that this trend will continue and amplify as the community becomes more aware of the predictive potential of fundamental kinetics when combined with detailed realistic modeling of the reactor operation.
Author: R A Sheldon
Publisher: World Scientific
ISBN: 9814579718
Category :
Languages : en
Pages : 393
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Book Description
This book consists of lectures presented by international authorities in the field, at a course on Oxidation Catalysis organized by the Dutch Research School in Catalysis at Rolduc in June 1994.The material covered spans the whole range of the subject from the fundamental principles of gas and liquid phase oxidations to reactor engineering for industrial processing. The use of catalytic oxidation in both bulk and fine chemicals manufacture and the different types of catalysis — heterogeneous-gas phase, homogeneous-liquid phase and heterogeneous-liquid phase — are discussed. In addition, a few special topics, such as electrocatalytic and high-temperature oxidation are dealt with.The book is intended for graduate students or industrial researchers who wish to acquaint themselves with the underlying principles of catalytic oxidations and the numerous applications of this important technology.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 15
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Book Description
Author: M.M. Bhasin
Publisher: Springer Science & Business Media
ISBN: 1461518075
Category : Science
Languages : en
Pages : 338
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Book Description
Natural gas, an abundant natural energy and chemical resource, is underutilized. Its inherent high energy content is compromised by its volatility. Storage and transportation problems abound for liquified natural gas. Several of the drawbacks of the utilization of natural gas, particularly its high volatility, could be offset by development of an economical and efficient process for coupling and/or further homologation of its principal component, methane. Alternatively, other conversion strategies such as partial oxidation to methanol and syngas, to oxygenates or conversion to such products via the intermediacy of chlorides should also be considered. Given the energy-intensive regimes necessary for the likely activation of methane, it was inevitable that researchers would tum to the use of heterogeneous catalysts. Heterogeneous catalysis is now a relatively mature discipline with numerous and diverse reactions being explored alongside informative studies on surface characterization, mechanism, and theory. Relationships to important related areas such as homogeneous catalysis, organometallic chemistry, and inorganic chemistry have become firmly established within this discipline. The field of methane and alkane activation is now over ten years old. The first decade of investigation produced results plagued by low yields and low-moderate conversions with well-articulated mechanistic limitations. As we begin the second decade of inquiry, novel strategies have brought increasing yields and conversions to such products as ethane, ethylene, methanol, and formaldehyde. These new approaches utilize separation of products via membranes or adsorbents. Moreover, additional mechanistic insight has been forthcoming from theoretical and computational examination as well as experimental investigation.
Author: P. Somasundaran
Publisher: CRC Press
ISBN: 9780849396038
Category : Science
Languages : en
Pages : 1014
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Book Description
Author: Liang-Shih Fan
Publisher: Cambridge University Press
ISBN: 1107194393
Category : Technology & Engineering
Languages : en
Pages : 497
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Book Description
The first comprehensive guide to chemical looping partial oxidation processes, covering key principles, techniques, and applications.
