• journal_title：Clay Minerals
• Contributor：Ya-Li Dai ; Shu-Qin Zheng ; Dong Qian
• Publisher：Mineralogical Society of Great Britain and Ireland
• Date：2009-
• Format：text/html
• Language：en
• Identifier：10.1180/claymin.2009.044.3.281
• journal_abbrev：Clay Minerals
• issn：0009-8558
• volume：44
• issue：3
• firstpage：281
• section：Articles

Sulphur reduction catalysts represent a viable option for S reduction in the fluid catalytic cracking (FCC) process. In this paper, a kaolin in situ crystallization catalyst was modified with vanadium and evaluated in a fixed fluid bed (FFB) reactor. The relation between the acidity of the catalyst, the S reduction rate and the catalyst activity is discussed. The results show that increasing weak Lewis acid acidity favours S reduction in the FCC process. Increasing the V content enhances the weak Lewis acidity, so causing the S reduction rate to increase. The kaolin in situ crystallization catalyst modified with 0.6 wt.% of V leads to a 34.5% reduction in the S content of the liquid product. Comprehensive evaluation of the FFB results and the S reduction ability indicates that the catalyst modified with 0.45 wt.% V provided the best performance.