US EPA

8581385 

Journal Article 

介孔H[P, Al]-ZSM-5分子筛上的苯甲醇自醚化反应 

Tian, HF; Ma, SZ; Lyu, JL; Zha, F; Tang, XH; Chang, Y; Guo, XJ 

2020 

No 

Huaxue Gongcheng / Chemical Engineering
ISSN: 1005-9954 

Editorial Office of Chemical Engineering (China) 

48 

10 

68-73 

Chinese 

10.3969/j.issn.1005-9954.2020.10.013 

The catalytic performance of acidic zeolites was affected by the diffusion limitation of the catalyst micropores. The mass transfer efficiency could be improved when mesopores were introduced into the zeolites. Mesoporous P substituted HZSM-5 zeolites(H[P, Al]-ZSM-5-AT-0.05M) were successfully synthesized by isomorphous substitution method and alkali treatment. It was characterized by means of XRD, N2 adsorption-desorption and Py-IR. The surface area, pore volume and P/Al (molar ratio) of H[P, Al]-ZSM-5-AT-0.05M are 328 m2/g, 0.23 cm3/g and 0.027, respectively. Moreover, its diffusion limitation was investigated with the self-etherification reaction of benzyl alcohol. The Thiele modulus φ and efficiency factor η of benzyl alcohol self-etherification reaction on H[P, Al]-ZSM-5-AT-0.05M are 0.08 and 16.9, respectively. It was speculated that H[P, Al]-ZSM-5-AT-0.05M has a higher mass transfer rate and lower diffusion limitation for benzyl alcohol self-etherification reaction due to the presence of mesoporous. © 2020, Editorial Office of "CHEMICAL ENGINEERING" (CHINA). All right reserved. 

Benzyl alcohol self-etherification; Diffusion limitation; Mass transfer rate; Molecular sieve; Thiele modulus