焙烧温度对Ni/γ-Al<sub>2</sub>O<sub>3</sub>还原条件及催化甲苯水蒸气重整反应的影响

刘吉; 王东旭; 肖显斌; 陈旭娇; 覃吴; 董长青

焙烧温度对Ni/γ-Al₂O₃还原条件及催化甲苯水蒸气重整反应的影响

华北电力大学生物质发电成套设备国家工程实验室, 北京 102206

基金项目: 国家自然科学基金(51206050); 教育部高等学校博士学科点专项科研基金(20120036120008)。

详细信息

通讯作者:
肖显斌,副教授,Tel:010-61771043,E-mail:xiaoxianbin@ncepu.edu.cn。

中图分类号: TQ426
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出版历程
- 收稿日期: 2014-05-11
- 修回日期: 2014-07-19
- 刊出日期: 2014-10-30

Effect of calcination temperature on Ni/γ-Al₂O₃ reduction and catalytic steam reforming of toluene

National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing 102206, China

摘要

摘要: 研究了焙烧温度对Ni/γ-Al₂O₃还原条件及催化甲苯水蒸气重整反应的影响。结果表明,焙烧温度对催化剂的还原条件及性能具有重要影响。700 ℃焙烧的催化剂在680 ℃的反应温度下表现出良好的反应性能,在不进行预还原的情况下仍保持了很高的催化活性及稳定性,其中,甲苯转化率达99%。并使用BET、XRD、TG-DTG等表征方法对反应前后的催化剂进行表征,随着焙烧温度的升高,催化剂比表面积降低、总孔容减小、平均孔径增大、镍与载体的结合程度逐渐增强、NiAl₂O₄含量逐渐增多,这是焙烧温度影响催化剂还原条件的主要原因。最后通过TEM、XPS对700 ℃焙烧的催化剂的结构进行了进一步的分析。
- 焙烧温度 /
- 镍/氧化铝 /
- 还原 /
- 甲苯 /
- 焦油 /
- 生物质制氢
Abstract: The influence of calcination temperature on Ni/γ-Al₂O₃ reducing conditions and catalytic steam reforming of toluene was studied. The results indicate that the catalyst calcined at 700 ℃ showed good catalytic performance at reaction temperature of 680 ℃ and maintained a high catalytic activity, stability without pre-reduction and 99% of toluene conversion was obtained under optimum conditions. The catalysts were also characterized by BET, XRD, TG-DTG and other techniques before and after reaction. As the calcination temperature was raised, the interaction between nickel and carrier was gradually enhanced, surface area and total pore volume decreased, and amount of NiAl₂O₄ in the catalyst increased. These are considered the main reasons for the effect of calcination temperature on the catalyst reduction conditions. Finally, the structure of the catalyst calcined at 700 ℃ is further analyzed using TEM, XPS.
- calcination temperature /
- Ni/Al₂O₃ /
- reduction /
- toluene /
- tar /
- hydrogen production from biomass

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参考文献(17)

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