燃料化学学报（中英文）2026，Vol.54Issue(3)：124-135,12.DOI:10.3724/2097-213X.2025.JFCT.0028
金属氧化物与分子筛串联催化褐煤热解挥发分重整制备轻质芳烃
Catalytic reforming of lignite pyrolysis volatiles over metal oxide and zeolite tandem catalysts for light aromatics production
摘要
Abstract
Pyrolysis is an important approach for achieving graded conversion of low-rank coal.However,the volatiles generated during this process are rich in oxygenated compounds and heavy components,which lead to low efficiency in direct utilization.Selecting appropriate catalysts for catalytic reforming of large molecules in volatiles can facilitate the upgrading of tar into lighter fractions,thereby simplifying the tar processing flow.This study proposes a tandem catalytic system combining metal oxides and zeolites.Through synergistic catalysis between the two catalysts,the pyrolysis volatiles of lignite are efficiently and selectively converted into light aromatics(such as benzene,toluene,ethylbenzene,xylene,naphthalene,methylnaphthalene,etc.).Simultaneously,pre-cracking effectively removes oxygenated components,reducing carbon deposition on the zeolite and extending the catalyst's lifespan.Research demonstrates that MgO,a metal oxide with strong alkalinity,significantly enhances the cracking and deoxygenation of volatiles;compared to using ZSM-5 alone,the addition of MgO in the upper layer significantly increases the yield of light aromatics while maintaining the original proportion of liquid products.The total yield of light aromatics rose by approximately 20％,reaching 21.5 mg/g.Furthermore,the incorporation of metal oxides effectively reduces carbon deposition on the zeolite,prolonging the catalyst's lifespan.关键词
热解/串联催化/轻质芳烃/催化剂寿命Key words
pyrolysis/tandem catalyst/light aromatics/catalyst lifespan分类
化学化工引用本文复制引用
徐敏,姚乃瑜,蔡士杰,鲁佑,赵小燕,曹景沛..金属氧化物与分子筛串联催化褐煤热解挥发分重整制备轻质芳烃[J].燃料化学学报（中英文）,2026,54(3):124-135,12.基金项目
Supported by National Key Research & Development Program of China(2024YFE0198000)and National Natural Science Foundation of China(22178374).国家重点研发计划(2024YFE0198000)和国家自然科学基金(22178374)资助 （2024YFE0198000）
