微球形沸腾床渣油加氢催化剂失活研究

Research in Deactivation of Ebullated-Bed Residue Hydrotreating Catalyst of Micro-Sphere

在沸腾床中试装置上考察了不同运转时间微球形沸腾床渣油加氢催化剂的失活情况。结果表明:不同运转时间对催化剂粒度没有影响,说明催化剂具有较高的耐磨性能,能够满足STRONG沸腾床的使用要求。在初期失活阶段,催化剂以积炭沉积为主,稳定阶段催化剂以金属沉积为主。运转后催化剂上积炭包括着脂肪族积炭和芳香族积炭两种类型,随着运转时间的延长,催化剂上形成芳香族高温碳。金属杂质和积炭在催化剂的外部和内部均匀沉积,均穿透了整个催化剂颗粒,提高了催化剂的利用率。

Deactivation of the hydrodemetallization catalysts with different run time from the pilot plant of ebullated bed was investigated. The results show there is no effect on the particle size distribution, which indicates high attrition performance and meets the STRONG process requirements. In the initial stage, the deactivated catalysts were mainly caused by coke deposition. In the stable stage, the deactivated catalysts were mainly caused by metal deposition. Coke deposition consists of aliphatic carbon and aromatic carbon of polycyclic aromatic structure. With the run time long, aromatic carbon formed on the catalyst. The metal and coke were uniformly deposited on the catalyst, which showed that the catalyst had a high utilization rate.