Abstract：The production of light olefins plays an important role in the field of products for petrochemical industry. Therefore, optimized utilization of the light olefins is one of the important topics in the catalysis research. In this paper, oligomerization conditions of butene-2 have been investigated in a miniature fixed-bed reaction system. The effect of acidity and pore structure were studied, and the kinetic model was established. The optimum reaction parameters of ZAM-5 were at temperature of 260 ℃, pressure of 4.5MPa, LHSV (liquid hourly space velocity) of 1 h-1. The optimum reaction parameters of SPAC (solid phosphoric acid) were at temperature of 210 ℃, pressure of 4 MPa and LHSV of 1 h-1. Compared with SPAC, ZSM-5 had higher liquid yield and C9+ fraction selectivity, but its dimer content was significantly lower than that of SPAC. It was found that the reaction of butene-2 was mainly influenced by the acidity and pore structure of the catalyst. SPAC has a mesoporous structure and strong acidity, which was beneficial to the formation of dimer. ZSM-5 has a microporous structure and weak acidity, which is beneficial to limit the cracking reaction and promote the formation of high olefins.
Li Tiansong,Xia Jiajia,Zhou Ming et al. Oligomerization Kinetics of Butene-2 Catalyzed by ZSM-5 Molecular Sieve or Solid Phosphoric Acid[J]. 化学反应工程与工艺, 2017, 33(1): 29-34.
