文献类型：期刊文献

英文题名：Temperature-Dependent NiFeAl catalysts for efficient microwave-assisted catalytic pyrolysis of polyethylene into value-added hydrogen and carbon nanotubes

作者：Zhang, Zhe[1];Chen, Huan[1];Hu, Wenheng[1];Xie, Meng[1];Pan, Yukun[1];Niu, Bo[1];Duan, Dengle[3];Ding, Lu[4];Long, Donghui[1,2];Zhang, Yayun[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tech, Shanghai 200237, Peoples R China;[3]Zhongkai Univ Agr & Engn, Minist Agr, Key Lab Green Proc & Intelligent Mfg Lingnan Speci, Guangzhou 510225, Peoples R China;[4]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China

年份：2024

卷号：366

外文期刊名：FUEL

收录：;EI(收录号：20241015696787);WOS:【SCI-EXPANDED(收录号:WOS:001202153500001)】；

基金：This work was financially supported by National Natural Science Foundation of China (No. 22008073) , Shanghai Sailing Program (No. 20YF1410600) , Fundamental Research Funds for the Central Univer- sities, and Shanghai Talent Development Fund (2021021) , the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE- 23C05) , Guangdong Common Colleges Young Innovative Talents Proj- ect, (No. 2021KQNCX029) .

语种：英文

外文关键词：Polyethylene upcycling; Hydrogen; Carbon nanotubes; Microwave-assisted pyrolysis; NiFeAl catalysts

摘要：Polyolefins, comprising the majority of disposable plastics, face challenges in catalytic upcycling due to their inert saturated C(sp3)-C(sp3) bonds. This work demonstrates microwave-assisted catalytic pyrolysis, demonstrating the direct conversion of low-density polyethylene (LDPE) into valuable H2 and multi-walled carbon nanotubes (MWCNTs) over a porous ternary NiFeAl-T composite catalyst that serve as a microwave absorber. Optimizing the calcination temperature promoted metal nanoparticle dispersion, leading to enhanced catalytic performance. Specifically, lower temperatures favored metal-metal interactions, inducing porous architectures with superior microwave absorption and energy dissipation capabilities. This facilitated cleavage of C-C and C-H bonds in LDPE during microwave irradiation. An optimal NiFeAl-450 catalyst achieved a maximum H2 yield of 60.5 mmol g  1 LDPE, with an H2 concentration of 85.1 vol% in gas products, alongside high-value MWCNTs. Moreover, successive recycling test displayed stable H2 and MWCNTs yields from LDPE. This work elucidates a promising pathway for upcycling plastic waste via microwave-assisted catalytic pyrolysis.