摘要
以工业FHUDS-5加氢脱硫催化剂为研究对象,在实验室固定床反应装置上考察了其在初期阶段的反应活性变化情况。结果表明,催化剂脱硫活性经2 h的快速失活后趋于稳定,稳定后催化剂脱硫率约为初始脱硫率的2/3。同时采用BET、XPS等仪器表征反应前后的催化剂,结果表明,催化剂到达活性稳定阶段后,比表面积和总孔容减少约30%和33%,积炭的主要成分为萘、菲等多环芳烃和长链烷烃,同时催化剂上活性金属流失和氧化可以忽略。表明Co-Mo/Al_2O_3催化剂在使用初期快速失活的主要原因为积炭失活。
Early stage of deactivation for hydrogenation desulfurization（HDS） over FHUDS-5 catalyst is carried out in a fixed bed reactor. The resuhs show that desulfurization rate of diesel oil by FHUDS-5 catalyst keeps stable after rapid deactivation of 2 hours. The comparative characterization of fresh and used catalysts indicates that the BET surface area and total pore volume of used catalyst are decreased about 30. 21% and 33.30%, respectively. Main components of coke deposition are polycyclic aromatic hydrocarbon and long-chain alkane according to the GC-MS results. The loss and oxidation of active metal in catalyst is negligible, which is not the reason that the desulfurization rate of diesel oil declines sharply. Therefore, early stage deactivation of FHUDS-5 is caused by coke deposition on surface of the catalyst.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第2期141-144,共4页
Modern Chemical Industry
关键词
柴油
加氢脱硫
失活
结焦
diesel oil
hydrogenation desulfurization
deactivation
coke
