DESIGN AND OPTIMIZATION OF CARBON EMMISLON REDUCTION PROCESS OF VENT GAS HYDROGEN PRODUCTION FROM NATURAL GAS

Guo Minggang

doi:10.19912/j.0254-0096.tynxb.2022-0187

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (6) : 500-507. DOI: 10.19912/j.0254-0096.tynxb.2022-0187

DESIGN AND OPTIMIZATION OF CARBON EMMISLON REDUCTION PROCESS OF VENT GAS HYDROGEN PRODUCTION FROM NATURAL GAS

Guo Minggang

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Abstract

In this regard, a gradient recovery process coupled with various types of separation membranes and compression condensation is developed to achieve high-value utilization of components such as H₂ and CO₂. The effects of pressure, product concentration and different hydrogen membrane units on the process are investigated. Through the process optimization simulation of Aspen HYSYS for a throughput of 10000 Nm³/h, it is concluded that when the single-stage hydrogen membrane unit and the single-stage two-step hydrogen membrane unit are used, the process economy is best when the exhaust gas inlet pressure is 2700 kPa and the H₂ product concentration is 60%. The H₂ recovery rate is 81% and 90%, the CO₂ recovery rate is 58% and 60%, the gas calorific value is 16.7 MJ/Nm³ and 18.2 MJ/Nm³, and the investment recovery period is 26.1 months and 24.4 months, respectively. When the second-stage hydrogen membrane unit is used, the investment is least, and when the best payback period is 16.5 months, the purity of the hydrogen product is 52%, which is lower than the design requirements of the hydrogen production adsorption device.

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natural gas / hydrogen production / membrane / carbon capture / process design / hydrogen recovery

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Guo Minggang. DESIGN AND OPTIMIZATION OF CARBON EMMISLON REDUCTION PROCESS OF VENT GAS HYDROGEN PRODUCTION FROM NATURAL GAS[J]. Acta Energiae Solaris Sinica. 2022, 43(6): 500-507 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0187

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