催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (7): 1262-1268.DOI: 10.3724/SP.J.1088.2011.10309

• 研究论文 • 上一篇    下一篇

常压高频放电等离子体炬改进制备 CO2/CH4 重整用 Ni/MgO 催化剂

覃攀1, 徐慧远2, 龙华丽1, 冉祎1, 尚书勇2, 储伟1, 印永祥1,*, 戴晓雁1   

  1. 1四川大学化学工程学院, 四川成都 610065; 2宜宾学院化学与化工学院, 四川宜宾 644000
  • 收稿日期:2011-03-09 修回日期:2011-04-21 出版日期:2011-07-18 发布日期:2014-11-28

Atmospheric High Frequency Discharge Plasma Jet Improved Preparation of Ni/MgO Catalyst for CO2 Reforming with CH4

QIN Pan1, XU Huiyuan2, LONG Huali1, RAN Yi1, SHANG Shuyong2, CHU Wei1, YIN Yongxiang1,*, DAI Xiaoyan1   

  1. 1School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China; 2School of Chemistry and Chemical Engineering, Yibin University, Yibin 644000, Sichuan, China
  • Received:2011-03-09 Revised:2011-04-21 Online:2011-07-18 Published:2014-11-28

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摘要： 比较了常规法、等离子体炬法和等离子体炬辅助焙烧法制得的 Ni/MgO 催化剂上 CO2/CH4 重整反应性能差异, 并利用 X 射线衍射、透射电镜、X 射线光电子能谱和 CO2 程序升温表面反应等技术对反应前后催化剂进行了表征. 结果表明, 采用等离子体炬辅助焙烧法制备的催化剂上 Ni 晶粒粒径小, 分散度较高, 低温活性和抗积炭性能较高; 在常压, 750 oC, 36 L/(h•g), n(CH4)/n(CO2) = 1 的反应条件下, CO2 和 CH4 转化率分别为 90.7% 和 89.4%, 反应 36 h 催化剂无明显失活.

关键词: 镍, 氧化镁, 二氧化碳, 甲烷, 重整, 常压高频放电等离子体炬

Abstract: A Ni/MgO catalyst was prepared using atmospheric high frequency discharge plasma jet. The influence of three preparation methods, the conventional method, plasma method, and plasma plus calcination method, on the catalyst activity was compared using CO2 reforming with methane as the probe reaction. The catalyst samples were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and CO2 temperature-programmed surface reaction. The results suggested that the Ni-based catalyst sample prepared by the plasma plus calcination method possessed smaller Ni particle size, higher dispersion of active components, higher low-temperature activity, and enhanced anti-coking ability. The conversions of CO2 and CH4 were 90.70% and 89.37%, respectively, and lasted for 36 h without obvious deactivation under 0.1 MPa, 36 L/(h·g) and 750 oC with n(CH4)/n(CO2) = 1.

Key words: nickel, magnesium oxide, carbon dioxide, methane, reforming, atmospheric high frequency discharge plasma jet