摘要
苯酚加氢法和环己烷氧化法等传统方法制环己醇存在能耗高、安全性差等问题。而环己烯水合法因环己醇选择性高、氢气消耗量低而受到广泛关注。然而,现有环己烯水合制环己醇催化剂(如ZSM-5分子筛)在酸量调控过程中存在骨架结构易被破坏、酸性分布不均等问题。采用挤条成型法复合干胶粉(主要成分为拟薄水铝石)与ZSM-5分子筛,制得一系列环己烯水合制环己醇催化剂。通过XRD和N_(2)物理吸/脱附等表征了催化剂的晶相结构和织构性质等,并在固定床反应器上评价了催化剂的催化性能。结果表明,在温度为110℃、压力为0.1 MPa、N_(2)流量为10 mL/min、空速为0.33 h^(-1)和n(水):n(环己烯)=6:1的条件下反应1 h,催化剂Z4-4:1(m(ZSM-5):m(干胶粉)为4:1)表现出最优的催化性能,其环己烯转化率为8.2%,环己醇选择性为79.0%。在一定范围内增强酸性和增大酸量,均可提升催化剂的催化性能。
Traditional methods for cyclohexanol production,such as phenol hydrogenation method and cyclohexane oxidation method,suffer from high energy consumptions and safety concerns.In contrast,the cyclohexene hydration method has attracted significant attention due to its high cyclohexanol selectivity and low hydrogen consumption.However,existing catalysts(such as ZSM-5 zeolite)for cyclohexene hydration to cyclohexanol face challenges including structural framework instabilities and uneven acid distributions during acid content regulation.A series of catalysts were prepared by compositing ZSM-5 zeolite with dry gel powder(primarily pseudo-boehmite)via extrusion molding.The crystal and textural structures of catalysts were characterized by XRD and N_(2) physisorption-desorption,etc.,and their catalytic performances were evaluated in a fixed-bed reactor.The results show that under optimized conditions of temperature of 110°C,pressure of 0.1 MPa,N_(2) flow rate of 10 mL/min,space velocity of 0.33 h^(-1) and n(water):n(cyclohexene)of 6:1 for 1 h,catalyst Z4-4:1(m(ZSM-5):m(dry gel powder)of 4:1)exhibits superior catalytic performance with cyclohexene conversion rate of 8.2%and cyclohexanol selectivity of 79.0%.The catalytic performance of catalyst can be improved by enhancing acid strength and increasing acid quantity within specific ranges.
作者
马子豪
侯朝鹏
吕帅帅
李红伟
高雨函
杨克勇
徐润
夏国富
MA Zihao;HOU Chaopeng;LV Shuaishuai;LI Hongwei;GAO Yuhan;YANG Keyong;XU Run;XIA Guofu(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083,China)
出处
《低碳化学与化工》
北大核心
2025年第12期59-65,共7页
Low-Carbon Chemistry and Chemical Engineering
基金
国家重点研发计划(2021YFA1501300)。
关键词
分子筛
环己烯
环己醇
酸量
zeolites
cyclohexene
cyclohexanol
acid contents
