摘要
本文分别讨论了渣油FCC催化剂中沸石和载体的作用以及两者的复合作用.指出:超稳Y分子筛的水热稳定性、抗钒性能和焦炭选择性都优于传统的沸石,适合作为渣油FCC催化剂的活性主体.活性载体可以改善催化剂对重油的裂化性能,但是选择性会有所降低,因而载体的活性应与沸石的活性取得平衡;催化剂的沸石/载体比应该根据特定的操作需要以量体裁衣的方法来确定.
Abstract The different roles of zeolite and matrix as well as their synergetic effect on cracking catalyst performance is discussed in this paper. For FCC resid processing, USY zeolite is perferred because of its superior hydrothermal stability, vanadium resistance and coke selectivity compared to conventional zeolites.Active matrix can improve the bottom fraction cracking capability with some selectivity penalties. Matrix activity should always be in balance with zeolite activity as required by specific objectives of the FCC unit. Therefore, the zeolite/matrix ratio of a catalyst should be tailored to fit the needs of the specific operation being considered.
出处
《石油炼制》
CSCD
1990年第10期37-42,共6页
