催化剂配方和操作参数对ARGG丙烯产率的影响

Increasing propylene yield of ARGG unit to improve economic benefits

中国石油大庆炼化公司1.8 Mt/a ARGG装置于1999年建成投产,主要以大庆常压渣油和减压渣油为原料,生产富含丙烯的液化石油气,并生产高辛烷值汽油。为满足清洁汽油生产的需要,2009年该装置进行了MIP-CGP技术改造。介绍了1.8 Mt/a ARGG装置催化剂配方调整和操作条件的优化情况。结果表明:反应温度522±2℃、剂油比6.2～6.7、催化剂活性61～62是该装置生产丙烯最合适的操作条件。催化剂择形分子筛ZSM-5的质量分数为5%时丙烯产率最高,过低时丙烯产率低,过高时干气、焦炭产率高。在保证液体收率基本不变的条件下,丙烯产率由8.65%提高到9.5%,全年多产丙烯19.7 kt,装置经济效益达到2 878×104RMB$。

The 1.8 MM TPY ARGG unit in PetroChina Daqing Petrochemical Co. , Ltd was started up in 1999 mainly to produce propylene-rich LPG and high octane gasoline from Daqing atmospheric residue and vacuum residue. To meet the requirements of producing clean gasoline, the unit was revamped with MIP-CGP process in 2009. The catalyst formula adjustment and optimization of operating conditions of the 1.8 MM TPY ARGG unit were introduced. The operation showed that the 522 ＋ 2 ℃ reaction temperature, 6.2-6.7 catalyst to oil ratio and 61-62 catalyst activity were the most appropriate operating conditions of the unit for producing propylene. The 5.0% of shape-selective ZSM-5 molecular sieve in the catalyst is most favorable for product distribution and proyylene yield. The propylene yield is low when it is lower than 5 %, and dry gas and coke make are high when it is higher than 5%. The propylene yield can be increased to 9.5% from 8.65% while liquid yield remains unchanged. The annual increase of propylene production is 19.7 kt and annual economic benefit of the unit is 28.78 million Yuan RMB.