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OALib Journal期刊
ISSN: 2333-9721
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制备方法对添加钇(y)的非负载型ni2p催化剂的影响
, PP. 1215-1220
Keywords: 程序升温还原法,低温次磷酸盐法,ni2p,二苯并噻吩(dbt),钇(y)
Abstract:
？采用程序升温还原(t)法和低温次磷酸盐法(l)制备了y-ni2p-t和y-ni2p-l催化剂,并采用xrd、bet、co吸附、xps等手段对催化剂进行了表征。以二苯并噻吩(dbt)为模型化合物,研究了稀土y对不同方法制备得到的催化剂加氢脱硫(hds)性能的影响。结果表明,对t法制备的催化剂,添加稀土y可以抑制ni5p4杂晶的生成,从而促进活性相ni2p的生成;添加稀土y能显著提高催化剂的比表面积,促进小粒径、高度分散的ni2p晶粒的生成。y-ni2p-t催化剂的dbt转化率达到91.0%,比ni2p-t催化剂提高了29%。对l法制备的催化剂,添加稀土y能抑制其他杂晶的生成,提高了y-ni2p-l催化剂对联苯(bp)的选择性,但催化剂的总hds活性比ni2p-l催化剂略有降低。
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