文献类型：期刊文献

英文题名：Engineering Joule-heated reactor with embedded conductive tube for efficient propane dehydrogenation

作者：Shi, Yao[1];Sui, Yanan[1];Yao, Jianheng[1];Qian, Gang[1];Zhou, Xinggui[1];Chen, De[1,2];Yuan, Weikang[1];Duan, Xuezhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China;[2]Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

年份：2026

卷号：321

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20254719550134);WOS:【SCI-EXPANDED(收录号:WOS:001629951200001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grants 22393952 and 22408098) and the China Postdoctoral Science Foundation (Grant 2024M750908) .

语种：英文

外文关键词：Propane dehydrogenation; Joule-heated reactor; Embedded conductive tube; Catalyst deactivation

摘要：In this work, a two-dimensional transient reactor bed-pellet coupled model incorporating shaped Pt-Sn/Al2O3 catalyst pellets is developed to comparatively evaluate propane dehydrogenation (PDH) performance in an External Radiation-Heated Reactor (ERHR) and an Internal Electricity-Heated Reactor (IEHR). External heating mode in ERHR induces significant radial and axial temperature gradients that limits PDH reactor performance. At the most balanced heat flux of 1100 W/m2, C3H8 conversion stabilizes above 38 % and C3H6 selectivity is 69.6 % by the end of the operation (240 min), and the stable operation window for achieving 30 % C3H6 yield is limited to 179 min. Lower heat fluxes (e.g., 500 W/m2) are insufficient to drive the endothermic PDH reaction, whereas higher heat fluxes (e.g., 1500 W/m2) intensify side reactions and catalyst deactivation. In contrast, the IEHR with embedded conductive tube achieves markedly improved thermal uniformity via in-situ Joule heating, mitigating radial and axial temperature gradients. At the heat input of 34.56 W, equivalent to the ERHR with of 1100 W/m2, IEHR0.5 (r/Rt = 0.5) reduces the cold spot radial temperature difference to 57 K at 60 min, thereby extending the stable operation window for 30 % C3H6 yield to 214 min. Further optimizing the embedded conductive tube position to r/Rt = 0.7 in IEHR yields a more uniform temperature field and sustains a 30 % C3H6 yield at 240 min, comparable to that of the isothermal reactor operated at 873.15 K. This study could offer insights for designing high-efficient, low-carbon Joule-heated PDH reactors.