Industrial Application of Pressure Swing Adsorption Gas Separation Technology in Ethylbenzene Tail Gas Recovery
This paper briefly introduces the main gas separation technologies at present,and compares them from the aspects of process principle,raw material characteristics,product quality,investment and land occupation.The process selection for recovering ethane gas and hydrogen from ethylbenzene tail gas by pressure swing adsorption(PSA)in a domestic refinery is briefly described.The composition,feed gas conditions,products and tail gas properties of pressure swing adsorption unit for ethylbenzene tail gas recovery is introduced in detail.According to the operation data of the unit,the product purity can reach above 95%(V)and the yield can reach above 99%by using PSA technology to recover ethane.PSA technology for recovery of C2 fraction and purification of hydrogen has the characteristics of a simple process,convenient operation,flexible operation mode,low comprehensive energy consumption,and is suitable for use in recovery of C2 fraction from refinery dry gas and hydrogen purification.
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