Effects of bio-syngas CO2 concentration on water-gas shift and side reactions with Fe-Cr based catalyst

Jaeuk Shin; Myung Soo Kang; Jungho Hwang

doi:10.1002/er.5861

Effects of bio-syngas CO₂ concentration on water-gas shift and side reactions with Fe-Cr based catalyst

Jaeuk Shin, Myung Soo Kang, Jungho Hwang

Department of Mechanical Engineering

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

3 Citations (Scopus)

Abstract

To increase the hydrogen (H₂) concentration in bio-syngas containing carbon dioxide(CO₂), water-gas shift reaction (WGSR) is widely used. In this study, the effects of CO₂ concentration on the WGSR and unwanted side reactions were investigated by varying the operating parameters, such as the steam/carbon monoxide (CO) ratio, reaction temperature, and the gas-hourly space velocity (GHSV). Based on the obtained results, CO conversion and H₂ yield decreased with increasing CO₂ concentration, especially when the steam/CO ratio was lower than 3. This implies that to minimize the negative effect of CO₂ on WGSR, the steam/CO ratio should be 3 or higher. For any CO₂ concentration, the highest CO conversion and H₂ yield were obtained at a reaction temperature of 400°C. Therefore, the temperature should be precisely controlled at 400°C. As GHSV decreased, the CO conversion approached equilibrium with any CO₂ concentration; however, the H₂ yield remained unchanged.

Original language	English
Pages (from-to)	1857-1866
Number of pages	10
Journal	International Journal of Energy Research
Volume	45
Issue number	2
DOIs	https://doi.org/10.1002/er.5861
Publication status	Published - 2021 Feb

Bibliographical note

Funding Information:
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20193010093000).

Publisher Copyright:
© 2020 John Wiley & Sons Ltd

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Fuel Technology
Energy Engineering and Power Technology

UN SDGs

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

Access to Document

10.1002/er.5861

Cite this

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title = "Effects of bio-syngas CO2 concentration on water-gas shift and side reactions with Fe-Cr based catalyst",

abstract = "To increase the hydrogen (H2) concentration in bio-syngas containing carbon dioxide(CO2), water-gas shift reaction (WGSR) is widely used. In this study, the effects of CO2 concentration on the WGSR and unwanted side reactions were investigated by varying the operating parameters, such as the steam/carbon monoxide (CO) ratio, reaction temperature, and the gas-hourly space velocity (GHSV). Based on the obtained results, CO conversion and H2 yield decreased with increasing CO2 concentration, especially when the steam/CO ratio was lower than 3. This implies that to minimize the negative effect of CO2 on WGSR, the steam/CO ratio should be 3 or higher. For any CO2 concentration, the highest CO conversion and H2 yield were obtained at a reaction temperature of 400°C. Therefore, the temperature should be precisely controlled at 400°C. As GHSV decreased, the CO conversion approached equilibrium with any CO2 concentration; however, the H2 yield remained unchanged.",

author = "Jaeuk Shin and Kang, {Myung Soo} and Jungho Hwang",

note = "Funding Information: This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20193010093000). Publisher Copyright: {\textcopyright} 2020 John Wiley & Sons Ltd",

year = "2021",

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doi = "10.1002/er.5861",

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AU - Shin, Jaeuk

AU - Kang, Myung Soo

AU - Hwang, Jungho

N1 - Funding Information: This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No. 20193010093000). Publisher Copyright: © 2020 John Wiley & Sons Ltd

PY - 2021/2

Y1 - 2021/2

N2 - To increase the hydrogen (H2) concentration in bio-syngas containing carbon dioxide(CO2), water-gas shift reaction (WGSR) is widely used. In this study, the effects of CO2 concentration on the WGSR and unwanted side reactions were investigated by varying the operating parameters, such as the steam/carbon monoxide (CO) ratio, reaction temperature, and the gas-hourly space velocity (GHSV). Based on the obtained results, CO conversion and H2 yield decreased with increasing CO2 concentration, especially when the steam/CO ratio was lower than 3. This implies that to minimize the negative effect of CO2 on WGSR, the steam/CO ratio should be 3 or higher. For any CO2 concentration, the highest CO conversion and H2 yield were obtained at a reaction temperature of 400°C. Therefore, the temperature should be precisely controlled at 400°C. As GHSV decreased, the CO conversion approached equilibrium with any CO2 concentration; however, the H2 yield remained unchanged.

AB - To increase the hydrogen (H2) concentration in bio-syngas containing carbon dioxide(CO2), water-gas shift reaction (WGSR) is widely used. In this study, the effects of CO2 concentration on the WGSR and unwanted side reactions were investigated by varying the operating parameters, such as the steam/carbon monoxide (CO) ratio, reaction temperature, and the gas-hourly space velocity (GHSV). Based on the obtained results, CO conversion and H2 yield decreased with increasing CO2 concentration, especially when the steam/CO ratio was lower than 3. This implies that to minimize the negative effect of CO2 on WGSR, the steam/CO ratio should be 3 or higher. For any CO2 concentration, the highest CO conversion and H2 yield were obtained at a reaction temperature of 400°C. Therefore, the temperature should be precisely controlled at 400°C. As GHSV decreased, the CO conversion approached equilibrium with any CO2 concentration; however, the H2 yield remained unchanged.

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