催化学报

催化学报 ›› 2010, Vol. 31 ›› Issue (9): 1115-1121.DOI: 10.1016/S1872-2067(10)60109-X

• 研究论文 • 上一篇    下一篇

流化床中 CH4/C3H8 自热重整制合成气

郭建忠 1, 侯昭胤 2, 郑小明 2   

  1. 1浙江农林大学化学系, 浙江临安 311300 2浙江大学催化研究所, 浙江省应用化学重点实验室, 浙江杭州 310028
  • 收稿日期:2010-09-30 出版日期:2010-09-30 发布日期:2014-01-25

Autothermal Reforming of CH4 and C3H8 to Syngas in a Fluidized-Bed Reactor

GUO Jianzhong1,*, HOU Zhaoyin2, ZHENG Xiaoming2   

  1. 1Department of Chemistry, Zhejiang A & F University, Lin’an 311300, Zhejiang, China 2Key Laboratory of Applied Chemistry of Zhejiang Province, Institute of Catalysis, Zhejiang University, Hangzhou 310028, Zhejiang, China
  • Received:2010-09-30 Online:2010-09-30 Published:2014-01-25

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861

被引次数

4

摘要： 在流化床反应器中, 考察了 Ni/SiO2 催化剂上 CH4 或 CH4-C3H8 临氧 CO2 重整 (自热重整) 制合成气反应性能. 结果表明, 在 CH4-C3H8 混合气自热重整反应中, Ni 粒径较小催化剂的活性和抗积炭性能较高, CH4 和 CO2 转化率分别达 75.5% 和 72.6%. C3H8 比 CH4 更易解离及被氧化, 部分 C3H8 解离出来的中间产物 CHx 物种可与吸附 H 结合为 CH4, 因而降低了 CH4 的表观转化率; CHx 也可与吸附的 CO2 物种反应生成 H2 与 CO, 从而促进了 CO2 的转化.

关键词: 甲烷, 丙烷, 自热重整, 合成气, 镍, 氧化硅, 负载型催化剂

Abstract: The catalytic properties of Ni/SiO2 catalysts with different Ni particle size for the oxy-reforming of methane or methane-propane with CO2 and O2 (autothermal reforming) in a fluidized-bed reactor were investigated. The results show that Ni/SiO2 catalysts with smaller Ni particle size exhibit higher catalytic activity and improved resistance to carbon deposition. The conversion of methane and carbon dioxide was 75.5% and 72.6%, respectively, for the methane-propane autothermal reforming reaction. The propane dissociates and is oxidized more easily than methane. The CHx intermediate species from propane dissociation combines with the adsorbed hydrogen to produce methane, which results in a decrease in the apparent conversion of methane. Additionally, H2 and CO are generated by the reaction with adsorbed CO2, which promotes the conversion of the CO2.

Key words: methane, propane, autothermal reforming, synthesis gas, nickel, silica, supported catalyst