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Author: Sungsik Kim Publisher: ISBN: Category : Languages : en Pages :
Book Description
ABSTRACT: A study of methane is conducted on the conditions of premixed lean methane air mixtures with platinum surface as a catalyst in one dimensional stagnation flow in steady state to understand enhancement of heat transfer under a new surface mechanism of methane oxidation. Premixed methane/air mixtures flowing onto platinum surface of various surface temperatures are simulated. Enhancement of heat transfer mechanism of catalytic methane oxidation is modeled based on GRI30 mechanism for gas reactions and Deutschmann mechanism for surface reactions. In the proposed surface mechanism, it is assumed that activated H2O and CO2 desorbs directly from platinum surface without elementary surface reaction and that activated H2O and CO2 are dissociated or deactivated by third body reactions. Thus, three elementary surface reactions are replaced in Deutschmann mechanism and four elementary reactions are added in GRI30 mechanism. Deutschmann mechanism and new catalytic methane mechanism are simulated and heat flux to non-reaction flow is calculated to see how much heat is required to maintain a given surface temperature. By comparing to conventional catalytic methane combustion, new mechanism shows different phenomena in ignition temperature, fuel consumption at each surface temperature, most importantly, heat transfer to non-reacting flow where there is no reactions due to enhancement of heat transfer by adsorption and desorption. In addition, heat transfer to non-reacting flow and enhancement of heat transfer are different with different rates of dissociation and deactivation reactions. Because of insufficient information about heat transfer to non-reacting flow, more research on enhancement of heat transfer is required to prove this mechanism.
Author: Sungsik Kim Publisher: ISBN: Category : Languages : en Pages :
Book Description
ABSTRACT: A study of methane is conducted on the conditions of premixed lean methane air mixtures with platinum surface as a catalyst in one dimensional stagnation flow in steady state to understand enhancement of heat transfer under a new surface mechanism of methane oxidation. Premixed methane/air mixtures flowing onto platinum surface of various surface temperatures are simulated. Enhancement of heat transfer mechanism of catalytic methane oxidation is modeled based on GRI30 mechanism for gas reactions and Deutschmann mechanism for surface reactions. In the proposed surface mechanism, it is assumed that activated H2O and CO2 desorbs directly from platinum surface without elementary surface reaction and that activated H2O and CO2 are dissociated or deactivated by third body reactions. Thus, three elementary surface reactions are replaced in Deutschmann mechanism and four elementary reactions are added in GRI30 mechanism. Deutschmann mechanism and new catalytic methane mechanism are simulated and heat flux to non-reaction flow is calculated to see how much heat is required to maintain a given surface temperature. By comparing to conventional catalytic methane combustion, new mechanism shows different phenomena in ignition temperature, fuel consumption at each surface temperature, most importantly, heat transfer to non-reacting flow where there is no reactions due to enhancement of heat transfer by adsorption and desorption. In addition, heat transfer to non-reacting flow and enhancement of heat transfer are different with different rates of dissociation and deactivation reactions. Because of insufficient information about heat transfer to non-reacting flow, more research on enhancement of heat transfer is required to prove this mechanism.
Author: Nick Kanellopoulos Publisher: CRC Press ISBN: 1466599391 Category : Science Languages : en Pages : 580
Book Description
It is estimated that a large fraction of natural gas reserves are found in locations from where transport is not economical. If these isolated natural gas reserves could be converted to synthetic fuels, they would generate around 250 billion barrels of synthetic oil-a quantity equal to one-third of the Middle East's proven oil reserves. Small-Scale
Author: Symeon Karagiannidis Publisher: Springer Science & Business Media ISBN: 3642176682 Category : Science Languages : en Pages : 122
Book Description
"Catalytic Microreactors for Portable Power Generation” addresses a problem of high relevance and increased complexity in energy technology. This thesis outlines an investigation into catalytic and gas-phase combustion characteristics in channel-flow, platinum-coated microreactors. The emphasis of the study is on microreactor/microturbine concepts for portable power generation and the fuels of interest are methane and propane. The author carefully describes numerical and experimental techniques, providing a new insight into the complex interactions between chemical kinetics and molecular transport processes, as well as giving the first detailed report of hetero-/homogeneous chemical reaction mechanisms for catalytic propane combustion. The outcome of this work will be widely applied to the industrial design of micro- and mesoscale combustors.
Author: D.M. Bibby Publisher: Elsevier ISBN: 0080960707 Category : Technology & Engineering Languages : en Pages : 759
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: Marcel Van de Voorde Publisher: Walter de Gruyter GmbH & Co KG ISBN: 3110594056 Category : Technology & Engineering Languages : en Pages : 423
Book Description
Carbon neutral hydrogen technologies play a key role in preventing climate change. Maximizing production of hydrogen in a clean and efficient manner is critical to the hydrogen economy. This book describes most of the potential hydrogen processing technologies and presents the state-of the- art and future developments of modern hydrogen technologies. Attention has been given to the theoretical aspects, thermodynamics, process calculations, and modeling approaches, new technologies and reports of multiple successful new pilot systems. The book should appeal to a brad readership and ideal for students of materials science, chemistry, physics; for researchers, chemical- and mechanical engineering, for industrialists, policymakers, economics, safety agencies and governments.
Author: Wade H. Shafer Publisher: Springer Science & Business Media ISBN: 147575776X Category : Science Languages : en Pages : 299
Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis, (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity was transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 19 (thesis year 1974) a total of 10,045 theses titles from 20 Canadian and 209 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 19 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
Author: Sungsik Kim
Author: Sungsik Kim
Author: Nick Kanellopoulos
Author: Symeon Karagiannidis
Author: D.M. Bibby
Author: Marcel Van de Voorde
Author: 
Author: 
Author: 
Author: Wade H. Shafer
Author: Yunus Ali Cengel