安全、健康和环境2026，Vol.26Issue(6)：57-65,9.DOI:10.3969/j.issn.1672-7932.2026.06.008
氨气预处理提高丙烯气相环氧化安全催化性能研究
Ammonia Pretreatment for Improved Safety and Catalytic Performance in Gas-Phase Propylene Epoxidation
摘要
Abstract
The direct gas-phase epoxidation of propylene with hydrogen is a highly promising novel method for synthesizing propylene oxide(PO).However,existing reaction systems present significant safety hazards,including wide flammability limits due to the coexistence of combustible gases and oxidizers,high risks of fire and explosion,low catalyst activity,and localized hot spots triggered by uncontrollable side reactions.The cur-rent inability to strike a balance between the economic viability and safety of the catalytic reaction severely re-stricts its industrialization.This study employed an ammonia pretreatment technology,resulting in a catalyst with enhanced catalytic activity(CC3H6=5.7%,SPO=93.1%).Ammonia pretreatment facilitated smaller and more uniform noble metal loading,enhanced the surface hydrophobicity of the titanium silicalite-1(TS-1)zeo-lite,and reduced the acidity of the catalyst surface.Consequently,it promoted rapid desorption of PO and ef-fectively mitigated ring-opening isomerization,thereby reducing the fire and explosion risks from uncontrollable side reactions.Meanwhile,ammonia treatment lowered the reaction temperature of the system,decreased the probability of hot spot formation and expanded the safe operating range for combustible gases and oxidizers.关键词
气相环氧化/Au/TS-1/环氧丙烷/氨气预处理/催化剂/安全操作区间Key words
gas phase epoxidation/Au/TS-1/propylene oxide/alkaline gas pretreatment/catalyst/safe op-erating range分类
化学化工引用本文复制引用
赵辰阳..氨气预处理提高丙烯气相环氧化安全催化性能研究[J].安全、健康和环境,2026,26(6):57-65,9.基金项目
国家自然科学基金面上项目(22578518),丙烯气相环氧化复合膜动态界面协同与催化-抑爆跨尺度耦合机制研究. （22578518）
