文献类型：期刊文献

英文题名：Towards maximum hydrogen output from methylcyclohexane dehydrogenation coupled with catalytic hydrogen combustion: An experimental and simulation study

作者：Wang, Shiyao[1];Si, Hao[1];Li, Ping[1];Cao, Chenxi[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Smart Mfg Energy Chem Proc, Minist Educ, Shanghai 200237, Peoples R China

年份：2025

卷号：98

起止页码：807

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20245017524039);WOS:【SCI-EXPANDED(收录号:WOS:001411841400001)】；

基金：The authors extend their gratitude to the National Key R&D Program of China (2023YFB4006101) .

语种：英文

外文关键词：Methylcyclohexane dehydrogenation; Catalytic hydrogen combustion; Coupled reactor; Hydrogen distributor; Energy utilization efficiency; Computational fluid dynamics simulation

摘要：We performed dehydrogenation of methylcyclohexane with recuperative heat supply from catalytic hydrogen combustion in a fixed-bed reactor for obtaining chemically stored hydrogen. A hydrogen distributor was adopted to modulate the temperature field by hydrogen combustion to synchronize the kinetics of combustion and dehydrogenation reactions. An average hydrogen production rate of 1075 mLN/min and a conversion of 86.0% for dehydrogenation were achieved over a 45-h continuous operating at a liquid hourly space velocity of 1.09 g/ gcat/h on 100 g Pt/Al2O3 catalyst. A three-dimensional computational fluid dynamics model was built to investigate the spatial distribution of temperature and species composition. It indicated that the hydrogen distributor design, featuring orifices along both the axial and radial directions, improved the temperature distribution and thus the conversion. The hydrogen flowrate emerged as the primary factor affecting the temperature distribution within the reactor. The technical potential of the proposed integrated hydrogen production system was evaluated, showcasing superior performance compared to reported systems using coupled fuel combustion, with a reaction efficiency of 43.7%, an energy efficiency of 61.1%, and a net hydrogen production efficiency of 34.9%. Our study offers theoretical guidelines for the engineering of large-scale stationary hydrogen storage utilizing liquid organic hydrogen carriers.