Partial oxidation of methane to syngas over Ni/MgO, Ni/CaO and Ni/CeO2

被引:140
作者
Tang, S [1 ]
Lin, J [1 ]
Tan, KL [1 ]
机构
[1] Natl Univ Singapore, Dept Phys, Surface Sci Lab, Singapore 119260, Singapore
关键词
partial oxidation of methane (POM); syngas; nickel catalyst; carbon deposition;
D O I
10.1023/A:1019034412036
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Partial oxidation of methane to syngas at atmospheric pressure and 750 degrees C was examined over Ni/MgO, Ni/CaO and Ni/CeO2 catalysts with nickel loading of 13 wt%. All catalysts had similar high conversion of methane and high selectivity to syngas, which nearly approached the values predicted by thermodynamic equilibrium. However, only Ni/MgO showed high resistance to carbon deposition under thermodynamically severe conditions (CH4/O-2 = 2.5, a higher CH4 to O-2 ratio than the stoichiometric ratio). Its catalytic activity remained stable during 100 h of reaction, with no detectable carbon deposition. The oxidation of carbon deposited from pure CH4 decomposition and from pure CO disproportionation was investigated by in situ TFO-MS study which showed that both were effectively inhibited over Ni/MgO. In addition, the catalysts were characterized by TPR, XRD and XPS. It was revealed that the excellent performance of Ni/MgO resulted from the formation of an ideal solid solution between NiO and MgO.
引用
收藏
页码:169 / 175
页数:7
相关论文
共 35 条
  • [1] MAGNESIA-SUPPORTED NICKEL-CATALYSTS .1. FACTORS AFFECTING THE STRUCTURE AND MORPHOLOGICAL PROPERTIES
    ARENA, F
    HORRELL, BA
    COCKE, DL
    PARMALIANA, A
    GIORDANO, N
    [J]. JOURNAL OF CATALYSIS, 1991, 132 (01) : 58 - 67
  • [2] SELECTIVE OXIDATION OF METHANE TO SYNTHESIS GAS-USING TRANSITION-METAL CATALYSTS
    ASHCROFT, AT
    CHEETHAM, AK
    FOORD, JS
    GREEN, MLH
    GREY, CP
    MURRELL, AJ
    VERNON, PDF
    [J]. NATURE, 1990, 344 (6264) : 319 - 321
  • [3] SELECTIVE OXIDATION OF METHANE TO CARBON-MONOXIDE ON SUPPORTED PALLADIUM CATALYST
    BHATTACHARYA, AK
    BREACH, JA
    CHAND, S
    GHORAI, DK
    HARTRIDGE, A
    KEARY, J
    MALLICK, KK
    [J]. APPLIED CATALYSIS A-GENERAL, 1992, 80 (01) : L1 - L5
  • [4] Catalytic reforming of methane with carbon dioxide over nickel catalysts .1. Catalyst characterization and activity
    Bradford, MCJ
    Vannice, MA
    [J]. APPLIED CATALYSIS A-GENERAL, 1996, 142 (01) : 73 - 96
  • [5] SELECTIVE OXIDATION OF METHANE TO CO AND H2 OVER UNREDUCED NIO-RARE EARTH OXIDE CATALYSTS
    CHOUDHARY, VR
    RANE, VH
    RAJPUT, AM
    [J]. CATALYSIS LETTERS, 1993, 22 (04) : 289 - 297
  • [6] LOW-TEMPERATURE OXIDATIVE CONVERSION OF METHANE TO SYNGAS OVER NIO-CAO CATALYST
    CHOUDHARY, VR
    RAJPUT, AM
    PRABHAKAR, B
    [J]. CATALYSIS LETTERS, 1992, 15 (04) : 363 - 370
  • [7] SELECTIVE OXIDATION OF METHANE TO CO AND H2 OVER NI/MGO AT LOW-TEMPERATURES
    CHOUDHARY, VR
    MAMMAN, AS
    SANSARE, SD
    [J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1992, 31 (09): : 1189 - 1190
  • [8] Oxidative conversion of methane to syngas over LaNiO3 perovskite with or without simultaneous steam and CO2 reforming reactions: Influence of partial substitution of La and Ni
    Choudhary, VR
    Uphade, BS
    Belhekar, AA
    [J]. JOURNAL OF CATALYSIS, 1996, 163 (02) : 312 - 318
  • [9] A STUDY OF CARBON DEPOSITION ON CATALYSTS DURING THE PARTIAL OXIDATION OF METHANE TO SYNTHESIS GAS
    CLARIDGE, JB
    GREEN, MLH
    TSANG, SC
    YORK, APE
    ASHCROFT, AT
    BATTLE, PD
    [J]. CATALYSIS LETTERS, 1993, 22 (04) : 299 - 305
  • [10] PARTIAL OXIDATION OF METHANE TO CARBON-MONOXIDE AND HYDROGEN OVER A NI/AL2O3 CATALYST
    DISSANAYAKE, D
    ROSYNEK, MP
    KHARAS, KCC
    LUNSFORD, JH
    [J]. JOURNAL OF CATALYSIS, 1991, 132 (01) : 117 - 127