TY - JOUR
T1 - Efficient liquid-phase ethylation of benzene with ethylene over mesoporous MCM-22 catalyst
AU - Zhang, Bin
AU - Wang, Zhendong
AU - Ji, Peng
AU - Liu, Yueming
AU - Sun, Hongmin
AU - Yang, Weimin
AU - Wu, Peng
PY - 2013
Y1 - 2013
N2 - Mesoporous MCM-22 zeolites with Si/Al ratios of 15-45 were hydrothermally synthesized through a hard template technique by carbon black particles. The physicochemical properties of mesoporous MCM-22 were characterized by XRD, SEM, N2 adsorption, TEM, XPS, ICP, TGA-DTA and NH3-TPD techniques. In comparison with conventional MCM-22, mesoporous MCM-22 showed an obvious hysteresis loop in N2 adsorption-desorption isotherm, and possessed 4-10 nm mesopores as well as a larger external surface area. The presence of mesopores was beneficial to increase the accessibility of zeolitic acid sites and to decrease the mass transfer limitations of bulky molecules. When employed to liquid-phase ethylation of benzene with ethylene, mesoporous MCM-22 exhibited higher ethylene conversion, higher selectivity to ethylated benzenes and better stability than conventional MCM-22, potentially serving as a solid-acid catalyst in petrochemical industry.
AB - Mesoporous MCM-22 zeolites with Si/Al ratios of 15-45 were hydrothermally synthesized through a hard template technique by carbon black particles. The physicochemical properties of mesoporous MCM-22 were characterized by XRD, SEM, N2 adsorption, TEM, XPS, ICP, TGA-DTA and NH3-TPD techniques. In comparison with conventional MCM-22, mesoporous MCM-22 showed an obvious hysteresis loop in N2 adsorption-desorption isotherm, and possessed 4-10 nm mesopores as well as a larger external surface area. The presence of mesopores was beneficial to increase the accessibility of zeolitic acid sites and to decrease the mass transfer limitations of bulky molecules. When employed to liquid-phase ethylation of benzene with ethylene, mesoporous MCM-22 exhibited higher ethylene conversion, higher selectivity to ethylated benzenes and better stability than conventional MCM-22, potentially serving as a solid-acid catalyst in petrochemical industry.
KW - Carbon templating
KW - Ethylbenzene
KW - Liquid-phase alkylation
KW - MCM-22
KW - Mesoporous zeolites
UR - https://www.scopus.com/pages/publications/84879095977
U2 - 10.1016/j.micromeso.2013.05.004
DO - 10.1016/j.micromeso.2013.05.004
M3 - 文章
AN - SCOPUS:84879095977
SN - 1387-1811
VL - 179
SP - 63
EP - 68
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
ER -