文献类型：期刊文献

英文题名：Simulation and enhancement of axial temperature distribution in a reactor filled with in-situ electrically heated structured catalyst

作者：Wang, Qiang[1];Ren, Yanlun[1];Liu, Houli[1];Liu, Hongxi[1];Wang, Xingwei[1];Gu, Zhonghao[1];Zhang, Li[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：55

起止页码：217

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20235115231099);WOS:【SCI-EXPANDED(收录号:WOS:001142323900001)】；

基金：This work was financially supported by the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：In-situ electrically heated structured catalyst; Methanol steam reforming; Temperature distribution; Segmented voltage control method

摘要：The hydrogen production technology based on the in-situ electrically heated structured catalyst (EHSC) has the advantages of compact structure, fast response, and less CO2 emissions. However, there is still a lack of research on the temperature distribution of the reactor filled with EHSC. Based on the problem, a CFD model was established, and the temperature distribution was revealed. To further reduce the large temperature difference in axial direction, the effects of the gradient-pitch design and segmented-voltage-control design for the EHSC on the temperature distribution and methanol conversion were studied numerically. The results showed that segmented-voltage-control design can significantly reduce the maximum axial temperature difference, due to the fact that the reaction heat and corresponding Joule heat supplied at each axial section were flexibly well matched. When reaction temperature was 275 degrees C, the maximum temperature difference decreased from 84.7 degrees C to 31.1 degrees C. Moreover, when GHSV was 13000 ml/(g h), methanol conversion was improved by up to 10.9%. The segmented voltage control method for the EHSC provides an opportunity to design an isothermal endothermic reactor under any reaction conditions in the case of further optimization of segmented-voltage-control design.