能源环境保护2024，Vol.38Issue(2)：190-197,8.DOI:10.20078/j.eep.20240205
原位生成Fe基催化剂催化木质素快速热解生成单环芳香烃的研究
Fast catalytic pyrolysis of lignin into monocyclic aromatic hydrocarbons over in-situ generated Fe-based catalyst
摘要
Abstract
This study examined the catalytic pyrolysis of kraft lignin using an in-situ generated Fe-based catalyst from iron ore.The fresh and spent catalysts were characterized by a transmission electron microscope to investigate the morphological changes of the catalysts.To evaluate the catalysts'perform-ance,a segmented pyrolysis reactor coupled with time-of-flight mass spectrometry was employed.The results showed that the fresh catalysts had a particle-like morphology,while the spent catalysts ap-peared sintered.Compared to unreduced iron ore and commercial Fe2O3,reduced iron ore significantly promoted the production of monocyclic aromatic hydrocarbons.A yield of monocyclic aromatic hydrocar-bons reached 81％at the optimized reaction temperature of 550 ℃C,with benzene,toluene,xylene and trimethylbenzene accounting for 46％,34％,13％and 7％respectively.Moreover,the possible pathway for kraft lignin via catalytic pyrolysis was proposed based on dehydroxylation and demethoxyla-tion.This work suggests that a low-cost iron ore catalyst could potentially be applied to pyrolyze kraft lignin to produce valuable bio-based aromatic hydrocarbons.关键词
催化热解/木质素/飞行时间质谱/铁矿石催化剂/单环芳香烃Key words
Catalytic pyrolysis/Lignin/Time-of-flight mass spectrometry/Iron ore catalyst/Monocy-clic aromatic hydrocarbons分类
资源环境引用本文复制引用
张婧,沈洋,诸麟榆,刘浩然,周忠岳..原位生成Fe基催化剂催化木质素快速热解生成单环芳香烃的研究[J].能源环境保护,2024,38(2):190-197,8.基金项目
国家重点研发计划资助项目(2019YFA0405600) （2019YFA0405600）
