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 selec-tivity.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-23s-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.

Ping Zhang;Chao Gong;Tao Zhou;Peng Du;Jieyu Song;Mengyang Shi;Xuerui Wang;Xuehong Gu

State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Jiangsu National Synergetic Innovation Center for Advanced Materials,Nanjing Tech University,Nanjing 211816,China

中国化学工程学报（英文版）

[1]Ping Zhang;Chao Gong;Tao Zhou;Peng Du;Jieyu Song;Mengyang Shi;Xuerui Wang;Xuehong Gu-.Helium extraction from natural gas using DD3R zeolite membranes)[J].中国化学工程学报（英文版）,2022(09):122-129

DD3R

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