Performance analysis in water-gas shift reactor for hydrogen yield improvement
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초록
This study aimed to produce hydrogen using unused natural gas generated from the fuel storage tank of a liquefied natural gas-powered ship. As natural gas and steam pass through steam–methane reforming (SMR) and water-gas shift (WGS) reactors, carbon monoxide, carbon dioxide, and reformed gases such as hydrogen are produced. In particular, carbon monoxide produced in an SMR reactor reacts with steam while passing through a WGS to increase the production of hydrogen and its conversion to carbon dioxide. In this study, the carbon monoxide–steam reaction mechanism occurring in a WGS reactor was analyzed, and performance variations in the WGS reactor were investigated through changes in variables, such as temperature and pressure. During the WGS reaction, as the temperature decreased, the conversion rate of carbon monoxide (WCO) increased, regardless of pressure. As the amount of carbon monoxide decreased, the conversion rate of carbon dioxide (WCO2) increased.
Abstract
This study aimed to produce hydrogen using unused natural gas generated from the fuel storage tank of a liquefied natural gas-powered ship. As natural gas and steam pass through steam–methane reforming (SMR) and water-gas shift (WGS) reactors, carbon monoxide, carbon dioxide, and reformed gases such as hydrogen are produced. In particular, carbon monoxide produced in an SMR reactor reacts with steam while passing through a WGS to increase the production of hydrogen and its conversion to carbon dioxide. In this study, the carbon monoxide–steam reaction mechanism occurring in a WGS reactor was analyzed, and performance variations in the WGS reactor were investigated through changes in variables, such as temperature and pressure. During the WGS reaction, as the temperature decreased, the conversion rate of carbon monoxide (WCO) increased, regardless of pressure. As the amount of carbon monoxide decreased, the conversion rate of carbon dioxide (WCO2) increased.
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