• Title/Summary/Keyword: CO-cleaning

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Experiment of CO Cleaning Process in DME Autothermal Reformate Gas for PEMFC Application (고분자 전해질 연료전지 적용을 위한 DME 자열개질가스 내 CO제거 공정 특성 연구)

  • Choi, Seung-Hyeon;Bae, Joong-Myeon
    • Transactions of the Korean hydrogen and new energy society
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    • v.22 no.4
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    • pp.474-480
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    • 2011

  • Hydrocarbon is required to be converted to pure hydrogen without carbon monooxide (CO) for polymer exchange membran fuel cell (PEMFC) applications. In this paper, CO cleaning processes as the downstream of Dimethyl ehter (DME) autothermal reforming process were performed in micro-reactors. Our study suggested two kinds of water gas shift (WGS) reaction process: High Temperature shift (HTS) - Low Temperature shift (LTS), Middle temperature shift (MTS). Firstly, using perovskite catalyst for MTS was decreased effieiciency since methanation. Using HTS-LTS the CO concentration was decreased about 2% ($N_2$ & $H_2O$ free) with the reaction temperature of $420^{\circ}C$ and $235^{\circ}C$ for HTS and LTS, respectively. As the final stage of CO cleaning process, preferential oxidation (PROX) was applied. The amount of additional oxygen need 2 times of stoichiometric at $65^{\circ}C$. The total conversion reforming efficiency of 75% was gained.

  • https://doi.org/10.7316/khnes.2011.22.4.474 인용 PDF KSCI