The Direct Conversion of Methane to Methanol by Controlled Oxidation PDF Download
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Author: C. B. Prakash
Publisher:
ISBN:
Category : Methane
Languages : en
Pages : 54
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Book Description
Author: C. B. Prakash
Publisher:
ISBN:
Category : Methane
Languages : en
Pages : 54
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Book Description
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: Vladimir Arutyunov
Publisher: Elsevier
ISBN: 0444632514
Category : Technology & Engineering
Languages : en
Pages : 321
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Book Description
Direct Methane to Methanol: Foundations and Prospects of the Process offers a state-of-the-art account of one of the most interesting and potentially commercial technologies for direct conversion of natural gas into valuable chemicals. The book thoroughly explains the complex and unusual chemistry of the process, as well as possible applications for direct methane to methanol (DMTM). It covers topics involving thermokinetics, pressure, direct oxidation of heavier alkanes, and more, and provides detailed appendices with experimental data and product yields. This book provides all those who work in the field of gas processing and gas chemistry with the theory and experimental data to develop and apply new processes based on direct oxidation of natural gas. All those who deal with oil and natural gas production and processing will learn about this promising technology for the conversion of gas into more valuable chemicals. - Reviews more than 350 publications on high-pressure, low-temperature oxidation of methane and other gas phase hydrocarbons - Contains rare material available for the first time in English - Explains the reasons of previous failure and outlines the way forward for commercial development of the conversion technology - Presents a deep theoretical knowledge of this complex conversion process
Author: P. S. Yarlagadda
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: D.M. Bibby
Publisher: Elsevier
ISBN: 0080960707
Category : Technology & Engineering
Languages : en
Pages : 759
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Book Description
This proceedings volume comprises the invited plenary lectures, contributed and poster papers presented at a symposium organised to mark the successful inauguration of the world's first commercial plant for production of gasoline from natural gas, based on the Mobil methanol-to-gasoline process. The objectives of the Symposium were to present both fundamental research and engineering aspects of the development and commercialization of gas-to-gasoline processes. These include steam reforming, methanol synthesis and methanol-to-gasoline. Possible alternative processes e.g. MOGD, Fischer-Tropsch synthesis of hydrocarbons, and the direct conversion of methane to higher hydrocarbons were also considered.The papers in this volume provide a valuable and extremely wide-ranging overview of current research into the various options for natural gas conversion, giving a detailed description of the gas-to-gasoline process and plant. Together, they represent a unique combination of fundamental surface chemistry catalyst characterization, reaction chemistry and engineering scale-up and commercialization.
Author: Parapari Mohammad Haghighi
Publisher:
ISBN:
Category :
Languages : en
Pages : 492
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Book Description
Experimental results were compared to the model predictions. The overall trend of methane and oxygen conversions as well as product selectivities was shown to be well represented by the kinetic model. It is suggested that methane can be activated by Oz or NO2 at the very beginning of the reaction, while further conversion may then proceed when other potential active radicals (0, H, OH, CH30, etc.) are produced in sufficient numbers. Also it is suggested that conversion through CH30 radical could be the major route for methanol production, while formaldehyde is produced via the CH2OH route. The production of C2H6, results from the coupling of CH3 radicals. Carbon oxides are considered to be produced via HCO radical. The experimental and modelling results were used to consider practical implication. It is concluded that the conversion is not thermodynamically favoured and needs to be controlled by chemical kinetics. Methane conversion is increased by temperature, pressures, residence times and nitric oxide addition, while decreased by increasing CH4/02 ratio. Methanol selectivity is enhanced by increasing pressure, CH4/02 ratio, and nitric oxide addition at low pressures, while there is an optimum temperature and residence time for maximum methanol production.
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:
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
The direct partial oxidation of CH4 to CH3OH has been studied in a non-permselective, non-isothermal catalytic membrane reactor system. A cooling tube introduced coaxially inside a tubular membrane reactor quenches the product stream rapidly so that further oxidation of CH3OH is inhibited. Selectivity for CH3OH formation is significantly higher with quenching than in experiments without quenching. For CH4 conversion of 4% to 7% CH3OH selectivity is 40% to 50% with quenching and 25% to 35% without quenching.
Author: Meenakshi Awasthi
Publisher:
ISBN: 9781681173535
Category : Methane
Languages : en
Pages : 0
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Book Description
The oxidative coupling of methane (OCM) is a type of chemical reaction discovered in the 1980s for the direct conversion of natural gas, primarily consisting of methane, into value-added chemicals. Direct conversion of methane into other useful products is one of the most challenging subjects to be studied in heterogeneous catalysis. [1] Methane activation is difficult because of its thermodynamic stability with a noble gas-like electronic configuration. The tetrahedral arrangement of strong C-H bonds. (435 kj/mol) offer no functional group, magnetic moments or polar distributions to undergo chemical attack. This makes methane less reactive than nearly all of its conversion products, limiting efficient utilisation of natural gas, the world's most abundant petrochemical resource.
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.
