摘要
在某炼油厂柴油加氢裂化装置停工换剂时,取样分析加氢裂化催化剂。对所取裂化剂进行甲苯抽提、再生后,采用比表面积及孔径分析仪、碳硫分析仪(C-S)和X射线衍射仪(XRD)等手段进行检测。结果表明,失活裂化剂的比表面积、孔容等孔结构性能参数明显降低。在最优的再生条件下,再生裂化剂上的C含量降至0.360%,裂化剂的表面或其它位置未发现杂质的明显沉积。再生裂化剂的比表面积损失约21.5%,其中微孔比表面积的损失约占87.2%,孔容损失约17.4%。加氢裂化催化剂长期在高温等条件下反应,造成分子筛晶粒的烧结、团聚等是导致其比表面积等孔结构性能降低的主要原因。
The sampling analysis of hydrocracking catalyst was conducted when the diesel hydrocracking unit in a refinery was shut down to replace catalyst.The specific surface area and aperture analyzer,carbon sulfur analyzer(C-S),and X-ray diffractometer(XRD)were carried out to analyze hydrocracking catalyst after toluene extraction and regeneration.The results showed that the specific surface area and pore volume of the deactivated hydrocracking catalyst were significantly reduced.Under the optimal regeneration condition,the carbon content of regenerated hydrocracking catalyst decreased to 0.360%,and there were no obvious impurities depositing on the surface of hydrocracking catalyst or other locations.But the specific surface area loss of regenerated hydrocracking catalyst was about 21.5%,in which the specific surface area loss of micropores accounted for about 87.2%,and the pore volume loss was about 17.4%.The main reason for the specific surface area and pore loss of hydrocracking catalyst is the sintering and agglomeration of zeolite grains under high temperature reaction for a long time.
作者
韩龙年
辛靖
范文轩
张萍
尉琳琳
陈禹霏
Han Longnian;Xin Jing;Fan Wenxuan;Zhang Ping;Wei Linlin;Chen Yufei(CNOOC Research Institute of Refining and Petrochemicals,Beijing 102209,China)
出处
《工业催化》
CAS
2020年第10期54-61,共8页
Industrial Catalysis
关键词
石油化学工程
柴油
加氢裂化催化剂
失活分析
petrochemical engineering
diesel
hydrocracking catalyst
deactivation analysis
