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Process Simulation and Cost Evaluation of Carbon Membranes for CO2 Removal from High-Pressure Natural Gas

Department of Chemical Engineering, Norwegian University of Science and Technology, NO 7491 Trondheim, Norway
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Membranes 2018, 8(4), 118; https://doi.org/10.3390/membranes8040118
Received: 19 October 2018 / Revised: 22 November 2018 / Accepted: 27 November 2018 / Published: 30 November 2018
(This article belongs to the Special Issue New Advances in Membrane Technologies for CO2 Separation)
Natural gas sweetening is required to remove the acid gas CO2 to meet gas grid specifications. Membrane technology has a great potential in this application compared to the state-of-the-art amine absorption technology. Carbon membranes are of particular interest due to their high CO2/CH4 selectivity of over 100. In order to document the advantages of carbon membranes for natural gas (NG) sweetening, HYSYS simulation and cost evaluation were conducted in this work. A two-stage carbon membrane process with recycling in the second stage was found to be technically feasible to achieve >98% CH4 with <2% CH4 loss. The specific natural gas processing cost of 1.122 × 10−2 $/m3 sweet NG was estimated at a feed pressure of 90 bar, which was significantly dependent on the capital-related cost. Future work on improving carbon membrane performance is required to increase the competitiveness of carbon membranes for natural gas sweetening. View Full-Text
Keywords: natural gas; carbon membranes; CO2 removal; process simulation; cost estimation; methane loss natural gas; carbon membranes; CO2 removal; process simulation; cost estimation; methane loss
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MDPI and ACS Style

Chu, Y.; He, X. Process Simulation and Cost Evaluation of Carbon Membranes for CO2 Removal from High-Pressure Natural Gas. Membranes 2018, 8, 118. https://doi.org/10.3390/membranes8040118

AMA Style

Chu Y, He X. Process Simulation and Cost Evaluation of Carbon Membranes for CO2 Removal from High-Pressure Natural Gas. Membranes. 2018; 8(4):118. https://doi.org/10.3390/membranes8040118

Chicago/Turabian Style

Chu, Yunhan, and Xuezhong He. 2018. "Process Simulation and Cost Evaluation of Carbon Membranes for CO2 Removal from High-Pressure Natural Gas" Membranes 8, no. 4: 118. https://doi.org/10.3390/membranes8040118

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