Kaolin as a raw material for mesoporous support was firstly modified by calcination
acid treatment
and then was used to prepare nickel catalysts. The amount of alumina which was activated in kaolin during thermal treatment and then leached out in the acid was different. XRD pattern of the kaolin calcined at 600℃ or 900℃ exhibited only the diffraction peaks for amorphous silica and quartz while that calcined at 1100℃ showed obvious peaks for γ-Al
2
O
3
. Therefore
the nickel-based catalysts exhibited different physic-chemical properties. Atmospheric syngas methanation over the catalysts clarified an activity order of CA-1100 CA-900 CA-1400 CA-600 KA ≈ 0 at temperatures of 350-650℃ and a space velocity of 120 L·g
-1
·h
-1
. Metallic nickel with small diameter which has medium interaction with the modified kaolin and is well dispersed on the support would have reasonably good activity and carbon-resistance for syngas methanation.
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相关作者
Xinxin Dong
Baosheng Jin
Zhiwei Kong
Yiqing Sun
Yincong Liu
Lingjun Zhu
Xiaoliu Wang
Shi Yin
相关机构
Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy & Environment, Southeast University
State Key Laboratory of Clean Energy Utilization, Zhejiang University
College of Chemistry and Chemical Engineering, Taiyuan University of Technology
State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology
College of Chemical Engineering, Qingdao University of Science and Technology