Kang, Dong Gyun Kwak, Yeonsu Moon, Seongeun Jeong, Woo Jong Ramadhani, Safira Nam, Suk Woo Jeong, Hyangsoo Sohn, Hyuntae Jo, Young Suk Yoon, Chang Won Kim, Yongmin 2024-05-30T08:30:42Z 2024-05-30T08:30:42Z 2024-05-30 2024-05 0196-8904 https://pubs.kist.re.kr/handle/201004/149953 In the global pursuit to minimize carbon emissions, hydrogen has emerged as a prominent alternative energy solution. This research introduces a thermally efficient, scalable, and potentially carbon-neutral system for releasing hydrogen, employing methylcyclohexane as a liquid organic hydrogen carrier (LOHC). Our heat supply mechanism utilizes benzyltoluene as a liquid-gas phase change material (PCM) to facilitate effective heat transfer from the heating units to the reactor. We have developed catalysts with high dispersion and Pt loading of Pt/gamma-Al2O3 that maintain performance over extended periods, achieving a hydrogen extraction rate of 2.3 Nm(H2)(3) (g) /h (equivalent to 5 kg(H2)/day) in a bench-scale reactor. The bench-scale setup achieves near-equilibrium conversion at a space velocity of 2 L-LOHC (L-cat-h) and 310 degrees C. The PCM-enhanced system supports a scalable catalytic bed design and simplifies heat supply and startup through the use of various heating methods. We then compare catalytic dehydrogenation reactor setups using single and hybrid heat sources; the former includes an internal Joule heater, offering simplicity and reduced heat loss but depends heavily on electrical energy, while the latter combines the internal Joule heater with an external fuel combustor, facilitating rapid startup albeit with increased heat loss. Lastly, we suggest future research directions to address existing technological hurdles and to expand the application of this system in scaling up hydrogen release processes. English Pergamon Press Ltd. Thermally manageable and scalable reactor configurations towards efficient hydrogen release from liquid organic hydrogen carriers Article 10.1016/j.enconman.2024.118345 1 Energy Conversion and Management, v.307 Energy Conversion and Management 307 Y scie scopus 001218925100001 2-s2.0-85188987267 Thermodynamics Energy & Fuels Mechanics Thermodynamics Energy & Fuels Mechanics Article PERFORMANCE DEHYDROGENATION STORAGE Hydrogen Methylcyclohexane Dehydrogenation Heat transfer medium Heat recovery Liquid organic hydrogen carriers