The Experts below are selected from a list of 83055 Experts worldwide ranked by ideXlab platform
Xenophon E Verykios - One of the best experts on this subject based on the ideXlab platform.
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partial oxidation of methane to Synthesis Gas via the direct reaction scheme over ru tio2 catalyst
Catalysis Letters, 1996Co-Authors: Yiannis Boucouvalas, Zhaolong Zhang, Xenophon E VerykiosAbstract:The partial oxidation of methane to Synthesis Gas has been investigated over various supported metal catalysts. The effects of operational variables on mass and heat transport resistances were investigated for defining the kinetic regime. It is observed that, in the absence of significant mass and heat transfer resistances, high selectivity (up to 65%) to Synthesis Gas is obtained over Ru/TiO2 catalysts in the low methane conversion range (\(X_{O_2 }< 100\% \)) whereas only negligibly small selectivity to Synthesis Gas is observed over all other catalysts investigated under similar conditions. This indicates that the Ru/TiO2 catalyst possesses unique properties, offering high selectivity to Synthesis Gas formation via the direct reaction scheme, whereas the other catalysts promote the sequence of total oxidation of methane to CO2 and H2O, followed by reforming reactions to Synthesis Gas. An increase of selectivity to Synthesis Gas, in the presence of oxygen, is achieved over the Ru/TiO2 catalyst by multi-feeding oxygen, which is attributed to suppression of deep oxidation of H2 and CO.
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Partial oxidation of methane to Synthesis Gas over Ru/TiO2 catalysts
11th International Congress On Catalysis - 40th Anniversary Proceedings of the 11th ICC, 1996Co-Authors: Yiannis Boucouvalas, Zhaolong Zhang, Angelos M. Efstathiou, Xenophon E VerykiosAbstract:The catalytic partial oxidation of methane to Synthesis Gas is investigated over Group VIII metal catalysts. It is shown that while all catalysts promote methane combustion followed by reforming with H2O and CO2, the Ru/TiO2 catalyst, to a large extent, promotes the direct formation of Synthesis Gas. The existence of the direct reaction route is probed by steady-state isotopic transient experiments. The extent of the direct route is found to be sensitive to modifications of the TiO2 carrier. FTIR and XANES studies indicate that the unique performance of the Ru/TiO2 catalyst is related to its high resistance to oxidation, which renders high selectivity to Synthesis Gas in the presence of oxygen.
Yiannis Boucouvalas - One of the best experts on this subject based on the ideXlab platform.
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partial oxidation of methane to Synthesis Gas via the direct reaction scheme over ru tio2 catalyst
Catalysis Letters, 1996Co-Authors: Yiannis Boucouvalas, Zhaolong Zhang, Xenophon E VerykiosAbstract:The partial oxidation of methane to Synthesis Gas has been investigated over various supported metal catalysts. The effects of operational variables on mass and heat transport resistances were investigated for defining the kinetic regime. It is observed that, in the absence of significant mass and heat transfer resistances, high selectivity (up to 65%) to Synthesis Gas is obtained over Ru/TiO2 catalysts in the low methane conversion range (\(X_{O_2 }< 100\% \)) whereas only negligibly small selectivity to Synthesis Gas is observed over all other catalysts investigated under similar conditions. This indicates that the Ru/TiO2 catalyst possesses unique properties, offering high selectivity to Synthesis Gas formation via the direct reaction scheme, whereas the other catalysts promote the sequence of total oxidation of methane to CO2 and H2O, followed by reforming reactions to Synthesis Gas. An increase of selectivity to Synthesis Gas, in the presence of oxygen, is achieved over the Ru/TiO2 catalyst by multi-feeding oxygen, which is attributed to suppression of deep oxidation of H2 and CO.
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Partial oxidation of methane to Synthesis Gas over Ru/TiO2 catalysts
11th International Congress On Catalysis - 40th Anniversary Proceedings of the 11th ICC, 1996Co-Authors: Yiannis Boucouvalas, Zhaolong Zhang, Angelos M. Efstathiou, Xenophon E VerykiosAbstract:The catalytic partial oxidation of methane to Synthesis Gas is investigated over Group VIII metal catalysts. It is shown that while all catalysts promote methane combustion followed by reforming with H2O and CO2, the Ru/TiO2 catalyst, to a large extent, promotes the direct formation of Synthesis Gas. The existence of the direct reaction route is probed by steady-state isotopic transient experiments. The extent of the direct route is found to be sensitive to modifications of the TiO2 carrier. FTIR and XANES studies indicate that the unique performance of the Ru/TiO2 catalyst is related to its high resistance to oxidation, which renders high selectivity to Synthesis Gas in the presence of oxygen.
Y.s. Lim - One of the best experts on this subject based on the ideXlab platform.
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Simulation of partial oxidation of natural Gas to Synthesis Gas using ASPEN PLUS
Fuel Processing Technology, 1997Co-Authors: M. Khoshnoodi, Y.s. LimAbstract:Abstract Conversion of natural Gas to liquid fuels is a challenging issue. In SMDS process natural Gas is first partially oxidized with pure oxygen to Synthesis Gas (a mixture of H 2 and CO) which is then converted to high quality liquid transportation fuels by utilizing a modernized version of the Fischer-Tropsch reaction. This paper presents a computer simulation of the first stage of the process, i.e. the Synthesis Gas production from natural Gas. ASPEN PLUS equipped with a combustion databank was used for calculations. Concentrations of over 30 combustion species and radicals expected in the Synthesis Gas have been calculated at equilibrium and several non-equilibrium conditions. Using a sensitivity analysis tool, the relative feed flow rates and reactor parameters have been varied searching to maximize the CO O 2 yield as well as to minimize the undesired nitrogen compounds in the product stream. The optimum reactor temperature for maximizing the CO mole fraction in the Synthesis Gas was also calculated.
Zhaolong Zhang - One of the best experts on this subject based on the ideXlab platform.
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partial oxidation of methane to Synthesis Gas via the direct reaction scheme over ru tio2 catalyst
Catalysis Letters, 1996Co-Authors: Yiannis Boucouvalas, Zhaolong Zhang, Xenophon E VerykiosAbstract:The partial oxidation of methane to Synthesis Gas has been investigated over various supported metal catalysts. The effects of operational variables on mass and heat transport resistances were investigated for defining the kinetic regime. It is observed that, in the absence of significant mass and heat transfer resistances, high selectivity (up to 65%) to Synthesis Gas is obtained over Ru/TiO2 catalysts in the low methane conversion range (\(X_{O_2 }< 100\% \)) whereas only negligibly small selectivity to Synthesis Gas is observed over all other catalysts investigated under similar conditions. This indicates that the Ru/TiO2 catalyst possesses unique properties, offering high selectivity to Synthesis Gas formation via the direct reaction scheme, whereas the other catalysts promote the sequence of total oxidation of methane to CO2 and H2O, followed by reforming reactions to Synthesis Gas. An increase of selectivity to Synthesis Gas, in the presence of oxygen, is achieved over the Ru/TiO2 catalyst by multi-feeding oxygen, which is attributed to suppression of deep oxidation of H2 and CO.
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Partial oxidation of methane to Synthesis Gas over Ru/TiO2 catalysts
11th International Congress On Catalysis - 40th Anniversary Proceedings of the 11th ICC, 1996Co-Authors: Yiannis Boucouvalas, Zhaolong Zhang, Angelos M. Efstathiou, Xenophon E VerykiosAbstract:The catalytic partial oxidation of methane to Synthesis Gas is investigated over Group VIII metal catalysts. It is shown that while all catalysts promote methane combustion followed by reforming with H2O and CO2, the Ru/TiO2 catalyst, to a large extent, promotes the direct formation of Synthesis Gas. The existence of the direct reaction route is probed by steady-state isotopic transient experiments. The extent of the direct route is found to be sensitive to modifications of the TiO2 carrier. FTIR and XANES studies indicate that the unique performance of the Ru/TiO2 catalyst is related to its high resistance to oxidation, which renders high selectivity to Synthesis Gas in the presence of oxygen.
Eli Ruckenstein - One of the best experts on this subject based on the ideXlab platform.
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catalytic conversion of methane to Synthesis Gas by partial oxidation and co2 reforming
Advances in Catalysis, 2004Co-Authors: Yun Hang Hu, Eli RuckensteinAbstract:Abstract The preparation of Synthesis Gas from natural Gas, which is the most important step in the Gas-to-liquid transformation, has attracted increasing attention in the last decade. Steam reforming, partial oxidation, and CO 2 reforming are the three major processes that can be employed to prepare Synthesis Gas. Because steam reforming was reviewed recently in this series [Adv. Catal. 47 (2002) 65], this chapter deals only with the latter two processes. The history of the development of methane conversion to Synthesis Gas is summarized as an introduction to the partial oxidation of methane, which is reviewed with emphasis on hot spots in reactors, major developments in the reduction of O 2 separation costs, and reaction mechanisms. The various catalysts employed in CO 2 reforming are examined, with emphasis on inhibition of carbon deposition.
