等离子体技术对CO<sub>2</sub>甲烷化用Ni/SiO<sub>2</sub>催化剂的改性作用

张旭; 孙文晶; 储伟

等离子体技术对CO₂甲烷化用Ni/SiO₂催化剂的改性作用

四川大学化工学院, 四川成都 610065

基金项目: 国家自然科学基金(205903603)。

详细信息

通讯作者:
储伟,教授,Tel:028-85403836;E-mail:chuwei.scu.cn@163.com。

中图分类号: TE643.36
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- 被引次数: 0
出版历程
- 收稿日期: 2012-06-18
- 修回日期: 2012-08-19
- 刊出日期: 2013-01-31

Effect of glow discharge plasma treatment on the performance of Ni/SiO₂ catalyst in CO₂ methanation

Department of Chemical Engineering, Sichuan University, Chengdu 610065, China

摘要

摘要: 采用浸渍法制备了Ni/SiO₂催化剂,应用等离子体技术对催化剂进行改性处理。以CO₂甲烷化为模型反应对催化剂进行活性评价,通过H₂程序升温还原(H₂-TPR)和CO₂程序升温脱附(CO₂-TPD)技术对催化剂进行表征。研究了等离子体技术强化处理对催化剂吸附性能和还原性能的影响。结果表明,与常规焙烧的催化剂相比,等离子体技术改性处理提高了催化剂活性组分的分散度,增加反应活性位并调变了活性位对吸附物种的吸附强度,改进了催化剂的还原性能,CO₂甲烷化反应活性和甲烷的时空产率显著提高。
- 射频等离子体 /
- Ni/SiO₂催化剂 /
- 催化性能 /
- 二氧化碳 /
- 甲烷化
Abstract: Ni/SiO₂ catalysts were prepared by impregnation method and treated by glow discharge plasma. The Ni/SiO₂ catalysts were characterized by CO₂-TPD and H₂-TPR; the effects of plasma treatment on the performances of Ni/SiO₂ in adsorption, reduction, and catalytic methanation of CO₂ were investigated. The results showed that the plasma treatment can remarkably improve the dispersion of active components and enhance the reactivity of Ni/SiO₂ catalyst. The catalytic performance of Ni/SiO₂ in CO₂ methanation is also enhanced by the plasma treatment; the conversion of CO₂ and the space time yield of CH₄ over the plasma modified catalyst are higher than those over the Ni/SiO₂ catalyst obtained through conventional impregnation and calcination method.
- glow discharge plasma /
- Ni/SiO₂ /
- catalytic performance /
- carbon dioxide /
- methanation.

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参考文献(22)

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