H 2 PSA purifier for CO removal from hydrogen mixtures

Young Woo You, Dong Geun Lee, Ki Yong Yoon, Dong Kyu Moon, Seong Man Kim, Chang Ha Lee

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Abstract

A two-bed PSA purifier was developed to produce high purity hydrogen for fuel cell applications. Two types of hydrogen-rich mixtures produced from coal off-gas were used. Feed 1 consisted of a 99% H 2 mixture (H 2:CO:CO 2:N 2 = 99:0.1:0.05:0.85 vol.%) containing 0.1% CO while Feed 2 was a 95% H 2 mixture (H 2:CO:CO 2:CH 4:N 2 = 95:0.3:0.1:0.05:4.55 vol.%) containing 0.3% CO. An increase in the P/F ratio and adsorption pressure led to an almost linear decrease in H 2 recovery with increasing purity. However, a sharp drop in CO concentration occurred at a specific operating range in both feeds. The feed was purified to 1.1 ppm CO with 99.99+% H 2 purity and 80.0% recovery under 6.5 bar and 0.15 P/F ratio while CO in Feed 2 could be reduced to 6.7 ppm with 99.96% H 2 purity and 78.4% recovery. The PVSA process, which combined vacuum and purge steps, could improve recovery by about 10% compared to the PSA process.

Original languageEnglish
Pages (from-to)18175-18186
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number23
DOIs
Publication statusPublished - 2012 Dec 1

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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