Lee Joongwon, Hong Ung Gi, Hwang Sunhwan, Youn Min Hye, Song In Kyu
School of Chemical and Biological Engineering, Institute of Chemical Processes, World Class University Program of Chemical Convergence for Energy and Environment, Seoul National University, Shinlim-dong, Kwanak-ku, Seoul 151-744, South Korea.
J Nanosci Nanotechnol. 2013 Nov;13(11):7504-10. doi: 10.1166/jnn.2013.7902.
Phosphorous-modified microporous and mesoporous ZSM-5 catalysts (XP/C-ZSM5) were prepared with a variation of phosphorous content (X = 0.17, 0.3, 0.7, 1.4, and 2.7 wt%), and they were applied to the production of light olefins (ethylene and propylene) through catalytic cracking of C5 raffinate. The effect of phosphorous content on the physicochemical properties and catalytic activities of XP/C-ZSM5 catalysts was investigated. It was revealed that physicochemical properties of XP/C-ZSM5 catalysts were strongly influenced by phosphorous content. Strong acidity of XP/C-ZSM5 catalysts decreased with increasing phosphorous content. In the catalytic cracking of C5 raffinate, both conversion of C5 raffinate and yield for light olefins (ethylene and propylene) showed volcano-shaped curves with respect to strong acidity. This result indicates that strong acidity of XP/C-ZSM5 catalysts played an important role in determining the catalytic performance in the catalytic cracking of C5 raffinate. Among the catalysts tested, 0.3P/C-ZSM5 catalyst with moderate strong acidity showed the best catalytic performance.
制备了具有不同磷含量（X = 0.17、0.3、0.7、1.4和2.7 wt%）的磷改性微孔和介孔ZSM-5催化剂（XP/C-ZSM5），并将其应用于通过C5抽余液的催化裂化生产轻质烯烃（乙烯和丙烯）。研究了磷含量对XP/C-ZSM5催化剂物理化学性质和催化活性的影响。结果表明，XP/C-ZSM5催化剂的物理化学性质受磷含量的强烈影响。XP/C-ZSM5催化剂的强酸性随磷含量的增加而降低。在C5抽余液的催化裂化中，C5抽余液的转化率和轻质烯烃（乙烯和丙烯）的产率相对于强酸性均呈现出火山形曲线。这一结果表明，XP/C-ZSM5催化剂的强酸性在决定C5抽余液催化裂化的催化性能方面起着重要作用。在所测试的催化剂中，具有中等强酸性的0.3P/C-ZSM5催化剂表现出最佳的催化性能。
