膜科学与技术

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Investigation on throttling and cooling behavior caused by CO2 permeation from natural gas in membrane process

Authors： WANG Changchun，ZHAO Qi,CONG Yufeng，WANG Lina，JIE Xingming，KANG Guodong，CAO Yiming

Units： 1 College of Petrochemical Engineering, Liaoning Petrochemical University, Fun shun 113001, China；2.Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics，Chinese Academy of Science, Dalian 116023, China

KeyWords： polyimide；separation membrane； Joule-Thomson effect；carbon dioxide；throttling expansion cooling

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2023,43(3):22-29

Abstract：

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Funds：

国家自然科学基金面上项目（22178333；21878284；22278390）；大连市重点学科重大课题研究项目（2022JJ11CG006）

AuthorIntro：

王常春（1997-），男，江苏连云港人，硕士，研究方向为膜分离技术，E-mail：wangcc@dicp.ac.cn.

Reference：

Using polyimide (PI) hollow fiber membrane modules self-made in laboratory, through the gas throttling permeation and cooling experimental device, the influences of main components of natural gas, membrane permeation rate, module packing density, operating pressure and vent flow ratio on CO2 throttling permeation and cooling phenomena during carbon dioxide removal by membrane were investigated and analyzed systematically. The experimental results showed that CO2 exhibited the most obvious cooling phenomenon, increasing membrane permeation rate, module packing density and operating pressure will aggravate the cooling behavior, that is, the faster cooling rate and the more serious cooling degree. When operating pressure is 1.5 MPa and feed temperature is 24.0 °C, the temperature in membrane module generated a maximum drop around 20 °C; on the other hand, the cooling behavior will be alleviated to some extent with the increase of vent flow ratio. These results reveal the influences of relevant parameters on the regularity of CO2 throttling permeation and cooling behavior in membrane module and provide a scientific and effective theoretical basis for the prediction of CO2 throttling permeation and cooling effect during carbon dioxide removing from natural gas by membrane separation.

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