文献类型：期刊文献

英文题名：Enhancing methane cracking through variable-frequency microwave heating: Improved energy efficiency and carbon nanotube formation

作者：Liu, Haolin[1] Liao, Wei[1] Wen, Mengyuan[1] Ren, Jurong[2] Wang, Shule[3] Meng, Xianzhi[4] Xiong, Lingming[5] Jin, Yanghao[6] Wang, Jia[1,2] Jiang, Jianchun[1,2]

第一作者：Liu, Haolin

通信作者：Wang, J[1];Jiang, JC[1]

机构：[1]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Longpan Rd 159, Nanjing 210037, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Jiangsu Prov Key Lab Biomass Energy & Mat, 16 Suojin Five Village, Nanjing 210042, Peoples R China;[3]Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA;[4]Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA;[5]Jiangsu Acad Agr Sci, Inst Agroprod Proc, Zhongling St 50, Nanjing 210014, Peoples R China;[6]KTH Royal Inst Technol, Dept Mat Sci & Engn, S-10044 Stockholm, Sweden

年份：2025

卷号：334

外文期刊名：ENERGY

收录：;EI(收录号：20253018857250);Scopus(收录号：2-s2.0-105011486036);WOS:【SCI-EXPANDED(收录号:WOS:001543421700007)】；

基金：This work is supported by the National Natural Science Foundation of China (Grant No. 52376195) , Natural Science Foundation of Jiangsu Higher Education Institutions (Grant No. 23KJB220005) .

语种：英文

外文关键词：Microwave frequency; Simulation; Methane cracking; Carbon nanotubes

摘要：This study investigates the impact of microwave frequency on methane cracking using an alpha-Fe. A COMSOL Multiphysics simulation model was developed to examine the impact of microwave frequency on the electromagnetic field and temperature distribution within the reactor. The optimal frequency of 5700 MHz in our cavity increases the energy efficiency to 66.1 %. Methane cracking experiments confirmed the simulation results, with a methane conversion rate of 98.3 % and high hydrogen selectivity under the identified conditions. Additionally, the spent alpha-Fe catalyst demonstrated potential for producing high-quality carbon nanotubes with uniform morphology. These findings underscore the benefits of variable-frequency microwave heating in enhancing reaction efficiency and product value, presenting a promising approach for sustainable hydrogen production and CNT synthesis.