Citation: Cui Sha, Meng Qingmin, Lin Xianjie, Yang Ying, Liu Baijun. Effect of Si/Al Ratio of Amorphous SiO₂-Al₂O₃ on Preparation of Ni₂P Catalyst under Low Temperature Condition[J]. Chemistry, ;2018, 81(3): 231-235. shu

Effect of Si/Al Ratio of Amorphous SiO₂-Al₂O₃ on Preparation of Ni₂P Catalyst under Low Temperature Condition

Cui Sha ¹ ,
Meng Qingmin ¹ ,
Lin Xianjie ² ,
Yang Ying ¹ ,
Liu Baijun ^1,,

1.
College of Chemical Engineering, China University of Petroleum-Beijing, Beijing 102249
2.
School of Chemistry, Heze University, Heze 27400

Corresponding author: Liu Baijun, bjliu2017@163.com
Received Date: 23 October 2017
Accepted Date: 19 December 2017

Figures(8)

The SiO₂ and amorphous SiO₂-Al₂O₃ (ASA) was prepared by stepwise precipitation method, and the Ni₂P/ASA catalyst was fabricated by saturated volume impregnation and programmed-temperature reduction. Characterizations of the supports and catalysts were performed using XRD, FT-IR, N₂ adsorption-desorption, H₂-TPR and TEM, and then the effects of SiO₂/Al₂O₃ mass ratio and specific surface area obtained with ASA on the Ni₂P formation were mainly investigated. Results showed that with the increasing of Al₂O₃ content in ASA support the more content of P was required for the formation of Ni₂P phase. Phosphorus firstly formed AlPO₄ phase with alumina, hindered the formation of phosphorus-rich atmosphere, however phosphorus-rich atmosphere was pre-requisited to the formation of Ni₂P phase, hence more P must be added to the carrier with more aluminum content to produce pure Ni₂P phase. TEM results indicated that the formation of AlPO₄ phase, in turn, promoted the reduction of Ni₂P particle size and facilitated the dispersion of the catalyst. The specific surface area of the support has little influence on the formation of Ni₂P phase
- Amorphous silica-alumina,
- Mass Si/Al ratio,
- Ni₂P
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沈阳化工大学材料科学与工程学院沈阳 110142

Effect of Si/Al Ratio of Amorphous SiO2-Al2O3 on Preparation of Ni2P Catalyst under Low Temperature Condition

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通讯作者: 陈斌, bchen63@163.com

Effect of Si/Al Ratio of Amorphous SiO₂-Al₂O₃ on Preparation of Ni₂P Catalyst under Low Temperature Condition