Kwak, Yeonsu Shin, Hyunah Moon, Seongeun Lee, Kwanhee Kirk, Jaewon Park, Yongha Jeong, Hyangsoo Sohn, Hyuntae Han, Jong Hee Nam, Suk Woo Yoon, Chang Won Kim, Yongmin Jo, Young Suk 2024-01-19T14:31:32Z 2024-01-19T14:31:32Z 2021-09-02 2021-06-10 0363-907X https://pubs.kist.re.kr/handle/201004/116862 Hydrogen carriers have been actively explored as a viable option for safe and economical hydrogen storage and transportation. However, the highly endothermic nature of dehydrogenation reactions results in a considerable temperature nonuniformity due to severe heat transfer limitations. To address this issue, a bench-scale catalytic reactor for hydrogen production is developed from methanol steam reforming (MSR) using a liquid-gas organic phase change material (PCM) working at a medium temperature range (200 degrees C-300 degrees C) and near-ambient pressure conditions. First, a comparative study was conducted to quantify the temperature homogeneities with or without adopting PCM; the former showed a higher temperature uniformity, leading to an improved hydrogen production rate and system efficiency. Additionally, a rapid start-up and uniform temperature profile of the catalytic bed at a steady state by the thermal management of the PCM were manifested. The liquid-gas organic PCM was stable during MSR at 250 degrees C, despite minor oxidation. For the feasibility study on a bench scale, 0.6 kW(e)-level hydrogen generation (equivalent to 5.83 kW(e)/L-reactor) using the PCM-based reactor was demonstrated. This work can provide insights into the scale-up and thermal management of various catalytic dehydrogenation reactors encompassing considerable heat absorption or release. English WILEY Investigation of a hydrogen generator with the heat management module utilizing liquid-gas organic phase change material Article 10.1002/er.6526 1 INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.45, no.7, pp.10378 - 10392 INTERNATIONAL JOURNAL OF ENERGY RESEARCH 45 7 10378 10392 scie scopus 000622344200001 2-s2.0-85101818839 Energy & Fuels Nuclear Science & Technology Energy & Fuels Nuclear Science & Technology Article heat transfer enhancement hydrogen production methanol steam reforming phase change material temperature uniformity