催化学报

催化学报 ›› 2011, Vol. 32 ›› Issue (2): 340-344.DOI: 10.3724/SP.J.1088.2011.00818

• 研究论文 • 上一篇    下一篇

冷等离子体喷射流对甲烷二氧化碳重整用 Ni/Al2O3 催化剂的还原机制

胡诗婧, 龙华丽, 徐艳, 尚书勇, 印永祥   

  1. 四川大学化工学院等离子体应用研究中心, 四川成都 610065
  • 收稿日期:2010-08-18 修回日期:2010-11-15 出版日期:2011-01-26 发布日期:2014-06-25

Reduction Mechanism of Ni/Al2O3 Catalyst Reduced by Cold Plasma Jet for Carbon Dioxide Reforming of Methane

HU Shijing, LONG Huali, XU Yan, SHANG Shuyong, YIN Yongxiang*   

  1. Center of Plasma Application, School of Chemical Engineering, Sichuan University, Chengdu 610065, Sichuan, China
  • Received:2010-08-18 Revised:2010-11-15 Online:2011-01-26 Published:2014-06-25

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摘要： 采用理论计算与实验相结合的方法研究了常压冷等离子体喷射流还原 Ni/Al2O3 催化剂的机理. 首先, 在假设还原过程是 H 原子起主导作用的基础上, 依据对冷等离子体喷射流的放电特性分析, 计算得到 H2 的理论解离度和催化剂理论还原时间. 其次, 采用 X 射线衍射表征及活性评价的手段, 考察了等离子体制得催化剂还原过程及实际还原时间. 结果表明, 理论结果与实验结果基本一致.

关键词: 大气压, 冷等离子体喷射流, 氧化铝, 镍基催化剂, 甲烷, 二氧化碳, 重整, 还原机制

Abstract: The reduction mechanism of the Ni/Al2O3 catalyst reduced by atmospheric pressure cold plasma jet was analyzed by theoretical calculation and experiments. First, the dissociation degree of hydrogen and reduction time required were theoretically estimated according to the collision model based on the idea of catalyst reduction by hydrogen atoms. Second, X-ray diffraction and activity measurement were used to test the catalyst reduced by 90% Ar-10% H2 cold plasma jet, which clearly exhibited the practical reduction process and reduction time. The reduction time obtained by theoretical calculation was much consistent with the experiment result.

Key words: atmospheric pressure, cold plasma jet, alumina, nickle-based catalyst, methane, carbon dioxide, reforming, reduction mechanism