煤炭转化2025，Vol.48Issue(6)：3-16,14.DOI:10.19726/j.cnki.ebcc.202506001
温和条件下Ni/TiN催化大黄山褐煤加氢裂解及其产物组成结构特征研究
Catalytic hydrocracking of Dahuangshan lignite over Ni/TiN under mild conditions and composition structural characteristics of products
摘要
Abstract
Catalytic hydrocracking(CHC)over metal-based catalysts is an effective approach to cleave the C—O bridged bonds in lignite for producing high-value aromatic compounds.In this study,Xinjiang Dahuangshan lignite(DL)and its model compound,i.e,2-phenoxy-1-phenyl-ethanol,were subjected to CHC under mild conditions over a Ni/TiN catalyst.Phenol and ethylben-zene are the major products from CHC of 2-phenoxy-1-phenylethanol at 250℃and 1 MPa(H2),and no hydrogenation products are produced.CHC can significantly facilitate cleaving the C—O bridged bonds in lignite at 300℃to obtain much higher yield of soluble portion(54.3%)than non-CHC(31.1%)using ethanol as the solvent.Detailed analyses of both light and heavy components in the soluble portion by using Fourier transform infrared spectroscopy(FTIR),gas chromatography/mass spectrometry(GC/MS),and quadrupole Orbitrap mass spectrometry(Orbitrap MS)shows that Ni/TiN promotes the cleavage of C—O bridged bonds and the formation of aromatic compounds with relative content of 46.3%,especially phenols.The heavy components obtained from CHC contain-more—OH/—C=O functional groups and aromatic structures with lower condensation degree and longer alkyl side chains.The reaction pathways for the formation of aromatic compounds via hydro-cracking of model compounds and lignite are inferred based on the product distribution.This study proposes a mild-condition catalytic hydrocracking approach to convert lignite into aromatic com-pounds,offering theoretical insights for the high-value utilization of lignite.关键词
褐煤/加氢裂解/Ni/TiN/C—O桥键/芳香族化合物Key words
lignite/catalytic hydrocracking/Ni/TiN/C—O bridged bond/aromatic com-pounds分类
化学工程引用本文复制引用
柳方景,张寒冰,仇乐乐,别蕾蕾,夏磊,王梦杰,赵云鹏,魏贤勇..温和条件下Ni/TiN催化大黄山褐煤加氢裂解及其产物组成结构特征研究[J].煤炭转化,2025,48(6):3-16,14.基金项目
中央高校基本科研业务费专项资金项目(2022QN1067). （2022QN1067）
