Temperature profiles of alumina-supported noble metal catalysts in autothermal reforming of methane

Abstract Temperature profiles of alumina supported Rh, Pt and Pd catalysts were investigated during the reactions related to autothermal reforming of methane by means of IR thermography. From the results of the mixture of reforming gas (CH 4 :H 2 O = 1:1) with combustion gas (CH 4 :O 2 = 1:2), we evaluated the overlap between the reforming and the combustion reaction zones. The most significant overlap was observed over Rh catalyst. In addition, the effect of W / F and reaction temperature on the temperature profiles and catalytic performance in the autothermal reforming reaction were systematically examined. The overlap between these reaction zones led to a higher methane conversion even at lower W / F during autothermal reforming of methane; such an overlap was considered to contribute to the inhibition of the hot spot formation. This phenomenon demonstrated an efficient heat transfer from exothermic combustion to endothermic reforming.

[1]  J. Lunsford,et al.  Are the equilibrium concentrations of carbon monoxide and hydrogen exceeded during the oxidation of methane over a nickel/ytterbium oxide catalyst? , 1993 .

[2]  Kaoru Fujimoto,et al.  Development of highly stable nickel catalyst for methane-steam reaction under low steam to carbon ratio , 1996 .

[3]  M. Prettre,et al.  The catalytic oxidation of methane to carbon monoxide and hydrogen , 1946 .

[4]  Gilbert F. Froment,et al.  Simulation of the catalytic partial oxidation of methane to synthesis gas , 1996 .

[5]  K. Kunimori,et al.  Catalyst development for direct heat supply from combustion to reforming in methane reforming with CO2 and O2 , 2003 .

[6]  A. Tsyganok.  Dry reforming of methane over supported noble metals: a novel approach to preparing catalysts , 2003 .

[7]  M. Menéndez,et al.  Oxidation of Methane to Synthesis Gas in a Fluidized Bed Reactor Using MgO-Based Catalysts , 1996 .

[8]  Takafumi Yoshida,et al.  Steam reforming of a clean model biogas over Ni/Al2O3 in fluidized- and fixed-bed reactors , 2002 .

[9]  D. Świerczyński,et al.  Hydrogen production from biomass gasification on nickel catalysts: Tests for dry reforming of methane , 2002 .

[10]  M. Asadullah,et al.  Effective heat supply from combustion to reforming in methane reforming with CO2 and O2: comparison between Ni and Pt catalysts , 2002 .

[11]  L. Mleczko,et al.  Reaction engineering investigations of CO2 reforming in a fluidized-bed reactor☆ , 2000 .

[12]  L. García,et al.  Hydrogen production by steam gasification of biomass using Ni-Al coprecipitated catalysts promoted with magnesium , 2002 .

[13]  Jens R. Rostrup-Nielsen,et al.  Technologies for large-scale gas conversion , 2001 .

[14]  Julian R.H. Ross,et al.  Syngas production from natural gas using ZrO2-supported metals , 1998 .

[15]  L. Schmidt,et al.  Synthesis gas formation by catalytic oxidation of methane in fluidized bed reactors , 1994 .

[16]  Y. Matsuo,et al.  Comparative study between fluidized bed and fixed bed reactors in methane reforming combined with methane combustion for the internal heat supply under pressurized condition , 2002 .

[17]  Adesoji A. Adesina,et al.  Kinetic studies of CH4 oxidation over Pt–NiO/δ-Al2O3 in a fluidised bed reactor , 1999 .

[18]  K. Kunimori,et al.  Catalyst Design of Pt-Modified Ni/Al2O3 Catalyst with Flat Temperature Profile in Methane Reforming with CO2 and O2 , 2002 .

[19]  A. J. Murrell,et al.  Selective oxidation of methane to synthesis gas using transition metal catalysts , 1990, Nature.

[20]  V. Choudhary,et al.  Energy efficient methane-to-syngas conversion with low H2/CO ratio by simultaneous catalytic reactions of methane with carbon dioxide and oxygen , 1995 .

[21]  K. Kunimori,et al.  Partial Oxidation of Methane to Synthesis Gas over Rhodium Vanadate, RhVO4: Redispersion of Rh Metal during the Reaction. , 1992 .

[22]  K. Fujioka,et al.  Catalytic combustion of natural gas as the role of on-site heat supply in rapid catalytic CO2H2O reforming of methane , 1995 .

[23]  K. Kunimori,et al.  A comparison of niobia- and vanadia-promoted Rh catalysts: The behaviors of RhMO4 (M = Nb, V) on SiO2 during calcination and reduction treatments , 1991 .

[24]  A. Kiennemann,et al.  Development of catalysts suitable for hydrogen or syn-gas production from biomass gasification , 2002 .

[25]  Julian R.H. Ross,et al.  The catalytic conversion of natural gas to useful products , 1996 .

[26]  U. Olsbye,et al.  Partial oxidation of methane to synthesis gas in a fluidized bed reactor , 1994 .

[27]  J. Geus,et al.  Mechanism of the partial oxidation of methane to synthesis gas on a silica-supported nickel catalyst , 1994 .

[28]  K. Kunimori,et al.  Structural transformation in Nb2O5-promoted Rh catalysts during calcination and reduction treatments , 1989 .

[29]  F. Basile,et al.  Partial oxidation of methane. Effect of reaction parameters and catalyst composition on the thermal profile and heat distribution , 2001 .

[30]  Julian R.H. Ross,et al.  The effect of O2 addition on the carbon dioxide reforming of methane over Pt/ZrO2 catalysts , 1998 .

[31]  G. Bond,et al.  Catalysis, science and technology , 1983 .

[32]  V. Choudhary,et al.  Energy efficient conversion of methane to syngas over NiO-MgO solid solution , 2000 .

[33]  Y. Matsuo,et al.  Autothermal CO2 reforming of methane over NiO–MgO solid solution catalysts under pressurized condition: Effect of fluidized bed reactor and its promoting mechanism , 2000 .

[34]  P. Jacobs,et al.  CATALYTIC AND THERMODYNAMIC APPROACH OF THE OXYREFORMING REACTION OF METHANE , 1992 .

[35]  Anders Holmen,et al.  Catalytic partial oxidation of methane to synthesis gas , 1995 .

[36]  J. Lunsford,et al.  Partial oxidation of methane to carbon monoxide and hydrogen over a Ni/Al2O3 catalyst , 1991 .

[37]  Y. Matsuo,et al.  Effective methane reforming with CO2 and O2 under pressurized condition using NiO–MgO and fluidized bed reactor , 2001 .

[38]  C. Courson,et al.  Development of Ni catalysts for gas production from biomass gasification. Reactivity in steam- and dry-reforming , 2000 .

[39]  Gbmm Guy Marin,et al.  An investigation on the reaction mechanism for the partial oxidation of methane to synthesis gas over platinum , 1995 .

[40]  A. M. Adris,et al.  Fluidized-bed steam methane reforming with oxygen input , 1999 .

[41]  K. Tomishige,et al.  Studies on Carbon Deposition in CO2Reforming of CH4over Nickel–Magnesia Solid Solution Catalysts , 1999 .

[42]  Guoxing Xiong,et al.  Effect of carbon dioxide on the reaction performance of partial oxidation of methane over a LiLaNiO/γ-Al2O3 catalyst , 2000 .

[43]  C. Mirodatos,et al.  Methane Reforming Reaction with Carbon Dioxide over Ni/SiO2Catalyst: II. A Mechanistic Study , 1996 .

[44]  Malcolm L. H. Green,et al.  Partial oxidation of methane to synthesis gas, and carbon dioxide as an oxidising agent for methane conversion , 1992 .

[45]  Marek Stelmachowski,et al.  Fuel from the synthesis gas--the role of process engineering , 2003 .

[46]  V. Choudhary,et al.  Simultaneous Carbon Dioxide and Steam Reforming of Methane to Syngas over NiO−CaO Catalyst , 1996 .

[47]  K. Kunimori,et al.  Percentage exposed of supported Pt, Pd and Rh catalysts studied by gas adsorption, tpr and tem methods , 1982 .