Ultrasonic Deposition of High-Selectivity Nanoporous Carbon Membranes

摘要

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, 1.8×10~12; oxygen, 5.6×10~-11; helium, 3.3×10~-10; and hydrogen, 6.1×10~-10.