H2 recovery and CO2 capture after water-gas shift reactor using synthesis gas from coal gasification

Sung Wook Lee, Jong Soo Park, Chun Boo Lee, Dong Wook Lee, Hakjoo Kim, Ho Won Ra, Sung Hyun Kim, Shin Kun Ryi

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In this study, a combined test of the WGS (water-gas shift) reactor and a Pd-based composite membrane was carried out for pre-combustion CO2 capture in a coal gasifier. The two series of WGS reactions, i.e., a high-temperature shift and a low-temperature shift, were performed under a gas composition of 60% CO and 40% H2 at 2100kPa to imitate coal gasification. The CO2 enrichment and H2 recovery tests at 673K and 2100kPa with the high-pressure membrane module after the WGS reaction presented the enriched CO2 concentration and H2 recovery ratios of ~92% and ~96%, respectively. The long-term stability test showed that the CO2 concentration decreased to 78.2%, and CO was generated and reached to 8.8% in the retentate stream after 47h because of reverse WGS and CO2 hydrogenation reaction on 316L stainless steel module. The stability test for ~3137h showed that these catalytic activities could be successfully prevented using steel with higher Cr and Ni contents, such as 310S. The WGS-membrane combination test using the outlet gas from a real coal gasifier was continued for ~100h and showed that the WGS catalysts and membrane module made of 310S would be stable under real conditions.

Original languageEnglish
Pages (from-to)635-642
Number of pages8
JournalEnergy
Volume66
DOIs
Publication statusPublished - 2014 Mar 1

Keywords

  • CCS
  • Coal gasification
  • Module
  • Pd-based membrane
  • WGS

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Pollution
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering

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