High-purity hydrogen production through sorption enhanced water gas shift reaction using K 2CO 3-promoted hydrotalcite

Hyun Min Jang; Ki Bong Lee; Hugo S. Caram; Shivaji Sircar

doi:10.1016/j.ces.2012.02.015

High-purity hydrogen production through sorption enhanced water gas shift reaction using K ₂CO ₃-promoted hydrotalcite

Hyun Min Jang, Ki Bong Lee, Hugo S. Caram, Shivaji Sircar

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

84 Citations (Scopus)

Abstract

Sorption enhanced water gas shift (SEWGS) reaction is a process concept, which simultaneously carries out the gas phase water gas shift (WGS) reaction (CO+H ₂O↔CO ₂+H ₂) and selective chemisorption of the byproduct CO ₂ from the gas phase reaction zone for direct production of essentially pure H ₂ in a single unit operation. A packed bed sorber-reactor containing an admixture of a WGS catalyst and a CO ₂ chermisorbent is used in the process. The concept circumvents the thermodynamic limitation of the WGS reaction and enhances the rate of reaction for H ₂ production. In this study, the SEWGS reaction concept was successfully demonstrated by both experiment and numerical simulation using K ₂CO ₃-promoted hydrotalcite as the CO ₂ sorbent. Numerical model simulations were also carried out to investigate the effects of various operating conditions of SEWGS reaction on the process performance. In general, higher H ₂O/CO feed ratio, higher fraction of sorbent (chemisorbent ratio in the sorber-reactor), and lower operating temperature favor both H ₂ productivity and CO conversion. Higher reaction pressure increases H ₂ productivity but decreases CO conversion.

Original language	English
Pages (from-to)	431-438
Number of pages	8
Journal	Chemical Engineering Science
Volume	73
DOIs	https://doi.org/10.1016/j.ces.2012.02.015
Publication status	Published - 2012 May 7

Keywords

CO adsorption
Hydrogen production
K CO -promoted hydrotalcite
Numerical analysis
Packed bed
Sorption enhanced water gas shift reaction

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Industrial and Manufacturing Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.ces.2012.02.015

Cite this

@article{e6c6c3c498014a3688bcd3a96cd757f8,

title = "High-purity hydrogen production through sorption enhanced water gas shift reaction using K 2CO 3-promoted hydrotalcite",

abstract = "Sorption enhanced water gas shift (SEWGS) reaction is a process concept, which simultaneously carries out the gas phase water gas shift (WGS) reaction (CO+H 2O↔CO 2+H 2) and selective chemisorption of the byproduct CO 2 from the gas phase reaction zone for direct production of essentially pure H 2 in a single unit operation. A packed bed sorber-reactor containing an admixture of a WGS catalyst and a CO 2 chermisorbent is used in the process. The concept circumvents the thermodynamic limitation of the WGS reaction and enhances the rate of reaction for H 2 production. In this study, the SEWGS reaction concept was successfully demonstrated by both experiment and numerical simulation using K 2CO 3-promoted hydrotalcite as the CO 2 sorbent. Numerical model simulations were also carried out to investigate the effects of various operating conditions of SEWGS reaction on the process performance. In general, higher H 2O/CO feed ratio, higher fraction of sorbent (chemisorbent ratio in the sorber-reactor), and lower operating temperature favor both H 2 productivity and CO conversion. Higher reaction pressure increases H 2 productivity but decreases CO conversion.",

keywords = "CO adsorption, Hydrogen production, K CO -promoted hydrotalcite, Numerical analysis, Packed bed, Sorption enhanced water gas shift reaction",

author = "Jang, {Hyun Min} and Lee, {Ki Bong} and Caram, {Hugo S.} and Shivaji Sircar",

note = "Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Korea government Ministry of Education, Science and Technology (2009-0072025) , and the Energy Efficiency and Resources R&D program (2011201020004A) and the Human Resources Development Program (20114010203050) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy. ",

year = "2012",

month = may,

day = "7",

doi = "10.1016/j.ces.2012.02.015",

language = "English",

volume = "73",

pages = "431--438",

journal = "Chemical Engineering Science",

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TY - JOUR

T1 - High-purity hydrogen production through sorption enhanced water gas shift reaction using K 2CO 3-promoted hydrotalcite

AU - Jang, Hyun Min

AU - Lee, Ki Bong

AU - Caram, Hugo S.

AU - Sircar, Shivaji

N1 - Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Korea government Ministry of Education, Science and Technology (2009-0072025) , and the Energy Efficiency and Resources R&D program (2011201020004A) and the Human Resources Development Program (20114010203050) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy.

PY - 2012/5/7

Y1 - 2012/5/7

N2 - Sorption enhanced water gas shift (SEWGS) reaction is a process concept, which simultaneously carries out the gas phase water gas shift (WGS) reaction (CO+H 2O↔CO 2+H 2) and selective chemisorption of the byproduct CO 2 from the gas phase reaction zone for direct production of essentially pure H 2 in a single unit operation. A packed bed sorber-reactor containing an admixture of a WGS catalyst and a CO 2 chermisorbent is used in the process. The concept circumvents the thermodynamic limitation of the WGS reaction and enhances the rate of reaction for H 2 production. In this study, the SEWGS reaction concept was successfully demonstrated by both experiment and numerical simulation using K 2CO 3-promoted hydrotalcite as the CO 2 sorbent. Numerical model simulations were also carried out to investigate the effects of various operating conditions of SEWGS reaction on the process performance. In general, higher H 2O/CO feed ratio, higher fraction of sorbent (chemisorbent ratio in the sorber-reactor), and lower operating temperature favor both H 2 productivity and CO conversion. Higher reaction pressure increases H 2 productivity but decreases CO conversion.

AB - Sorption enhanced water gas shift (SEWGS) reaction is a process concept, which simultaneously carries out the gas phase water gas shift (WGS) reaction (CO+H 2O↔CO 2+H 2) and selective chemisorption of the byproduct CO 2 from the gas phase reaction zone for direct production of essentially pure H 2 in a single unit operation. A packed bed sorber-reactor containing an admixture of a WGS catalyst and a CO 2 chermisorbent is used in the process. The concept circumvents the thermodynamic limitation of the WGS reaction and enhances the rate of reaction for H 2 production. In this study, the SEWGS reaction concept was successfully demonstrated by both experiment and numerical simulation using K 2CO 3-promoted hydrotalcite as the CO 2 sorbent. Numerical model simulations were also carried out to investigate the effects of various operating conditions of SEWGS reaction on the process performance. In general, higher H 2O/CO feed ratio, higher fraction of sorbent (chemisorbent ratio in the sorber-reactor), and lower operating temperature favor both H 2 productivity and CO conversion. Higher reaction pressure increases H 2 productivity but decreases CO conversion.

KW - CO adsorption

KW - Hydrogen production

KW - K CO -promoted hydrotalcite

KW - Numerical analysis

KW - Packed bed

KW - Sorption enhanced water gas shift reaction

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