沸石
膜
天然气
萃取(化学)
氦
分析化学(期刊)
化学
色谱法
渗透
材料科学
化学工程
渗透
选择性
气体分离
有机化学
催化作用
生物化学
工程类
作者
Ping Zhang,Chao Gong,Tao Zhou,Peng Du,Jun Young Song,Mengyang Shi,Xuerui Wang,Xuehong Gu
标识
DOI:10.1016/j.cjche.2021.09.004
摘要
Helium (He) is commercially produced from natural gas by low-temperature condensation. The process is energy extensive because of the extremely low He concentration (<0.3%) and the operation at cryogenic temperature. Herein we demonstrated DD3R zeolite membrane was efficient to extract He from natural gas at atmosphere temperature. The membrane performance was evaluated in terms of temperature, pressure and molar fractions. The overall membrane performance was dominated by the diffusivity selectivity. The single He permeance and ideal He/CH4 selectivity were 5.8 × 10−9 mol·m−2·s−1·Pa−1 and 79 under a feed pressure of 1.3 MPa. Even though He concentration was as low as 0.22%, the He permeance and He/CH4 mixture selectivity were 3.0 × 10−9 mol·m−2·s−1·Pa−1 and 44 at 0.7 MPa. During the long-term operation (∼130 h) the membrane performance was stable even the feed mixture containing 3.6% ethane as contaminations. The results approved the feasibility of DD3R zeolite membranes for He extraction from natural gas.
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