title: Ultrasonic deposition of high-selectivity nanoporous carbon membranes
abstract: Ultrasonic deposition creates a thin film of polymer on a tubular, macroporous, stainless steel support. Using polyfurfuryl alcohol as the nanoporous carbon precursor and a pyrolysis temperature of 723 kelvin, a membrane was prepared with the following permeances, measured in moles per square meter per Pascal per second: nitrogen, 1.8 x 10(-12); oxygen, 5.6 x 10(-11); helium, 3.3 x 10(-10); and hydrogen, 6.1 x 10(-10). The ideal separation factors as compared to that for nitrogen are 30:1, 178:1, and 331:1 for oxygen, helium, and hydrogen, respectively.
authors.affiliation: DuPont Central Research and Development, Experimental Station, Wilmington, DE 19880, USA. Center for Catalytic Science and Technology, Department of Chemical Engineering, University of Delaware, Newark, DE 19716, USA.
authors.initials: MB
authors.lastname: Shiflett
authors.initials: HC
authors.lastname: Foley