Separation of p-Xylene from multicomponent vapor mixtures using tubular MFI zeolite membranes
MFI zeolite membranes have been synthesized on tubular -alumina substrates to investigate the separation of p-xylene (PX) from m-xylene (MX) and o-xylene (OX) in multicomponent mixtures and ranges of feed pressure and operating temperature. 1,3,5-triisopropylbenzene was added to the feed stream for online membrane modification. Separation of PX from MX and OX through the MFI membranes relies primarily on shape-selectivity when the xylene sorption level in the zeolite is sufficiently low. For an eight-component mixture containing hydrogen, hydrocarbons, PX, MX, and OX, PX/(MX+OX) selectivity of 7.71 with PX flux of 6.8 10-6 mol/m2·s was obtained at 250oC and atmospheric feed pressure.
Xuehong Gu Junhang Dong Tina M. Nenoff Dickson E. Ozokwelu
Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati,OH 45221-0012 Surface and Interface Sciences, Sandia National Laboratories, Albuquerque NM 87185-1415,USA Industrial Technologies Program, U.S. Department of Energy, Washington DC 20585, USA
国际会议
北京
英文
2007-08-12（万方平台首次上网日期，不代表论文的发表时间）