高校化学工程学报2026，Vol.40Issue(3)：589-602,14.DOI:10.3969/j.issn.1003-9015.2025.00.076
丙酮热催化常用分子筛缩合路径与积碳行为研究
Study on condensation pathways and coking behavior of acetone over conventional zeolites in thermal catalysis
摘要
Abstract
This work conducted a theoretical study on four commonly used zeolite materials(NaY,NaZSM-5,NaMCM-22,and S-1),combining the practical requirements of acetone thermal catalysis.The structural characteristics,catalytic performance,evolution of intermediate products during temperature-programmed processes were evaluated,and coke behavior from the perspectives of acid properties and intermediate product evolution were investigated.Experimental results showed that the catalytic conversion of acetone on pure zeolites primarily depends on their inherent acidity.However,the acidity also promoted the transformation of acetone into refractory intermediates,subsequently triggering coke formation.Due to their acidic structures and modification by Na+ions,NaY,NaMCM-22,and NaZSM-5 generated condensation by-products such as acetic anhydride,isophorone,and mesityl oxide.As the temperature increased to 360℃,acetone and its by-products could be progressively degraded into acetic acid and formic acid,ultimately desorbing as H2O and CO2.In contrast,the S-1 zeolite framework consists mainly of Si—O—Si structures and lacks acidic sites.It showed no catalytic activity for acetone degradation during the temperature-programmed process.Aparting from the desorption of trace amounts of acetone,no condensation or cracking products were detected.Among the three sodium-containing zeolites,NaMCM-22 generated the most condensation by-products and exhibited the lowest acetone degradation efficiency.NaZSM-5 achieved the highest mineralization efficiency for acetone,followed by NaY.This study details the degradation and condensation pathways of acetone on each material,providing new theoretical insights for improving the thermal catalytic degradation of acetone using zeolite materials.关键词
丙酮降解/分子筛/积碳/酸性位点/反应机理Key words
acetone degradation/zeolite/coke deposition/acid sites/reaction mechanism分类
资源环境引用本文复制引用
陈美芬,彭延治,高明,余晓玲,万益群,陈会明,刘艳..丙酮热催化常用分子筛缩合路径与积碳行为研究[J].高校化学工程学报,2026,40(3):589-602,14.基金项目
江西省自然科学基金(20232BAB206157) （20232BAB206157）
江西省市场监督管理局科技项目(GSJK202009). （GSJK202009）
