Carbon molecular sieve membranes for biogas upgrading: Techno-economic feasibility analysis

Xuezhong He*, Yunhan Chu, Arne Lindbråthen, Magne Hillestad, May Britt Hägg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

Biomethane, produced by biogas upgrading, has a great potential to replace part of the fossil fuel natural gas, and may be injected into a gas grid or used as compressed biomethane as vehicle fuel. The state-of-the-art technologies for biogas upgrading in the European region are water scrubbing, pressure swing adsorption and chemical absorption, however, high performance carbon membranes may also have a great potential in this application. In this work, cellulose-derived hollow fiber carbon membranes were tested for CO2/CH4 separation at moderate pressures (5–20 bar), and a CO2/CH4 permeance selectivity >60 was obtained. The developed membranes were evaluated for biogas upgrading in a 1000 m3(STP)/h biogas plant based on HYSYS simulation and cost estimation. The results indicated that carbon membranes can be a promising candidate for biogas upgrading with a low processing cost of 0.078 $/m3 at the feed pressure of 8.5 bar. Increased membrane performance can further reduce the cost. Moreover, a carbon membrane system can be very cost-effective for upgrading of biogas in small-scale plants of around 350 m3(STP)/h.

Original languageEnglish
Pages (from-to)584-593
Number of pages10
JournalJournal of Cleaner Production
Volume194
DOIs
StatePublished - 1 Sep 2018
Externally publishedYes

Keywords

  • Biogas upgrading
  • Carbon molecular sieve membrane
  • Cost estimation
  • Process simulation
  • Technology feasibility

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