低碳化学与化工2025，Vol.50Issue(4)：64-70,7.DOI:10.12434/j.issn.2097-2547.20240334
老化时间对铜硅环己醇脱氢催化剂副产物苯酚选择性的影响
Effects of aging time on selectivity of by-product phenol in cyclohexanol dehydrogenation catalyzed by copper-silicon catalysts
摘要
Abstract
Copper-silicon catalysts exhibit excellent performance in the dehydrogenation of cyclohexanol to cyclohexanone,and reducing the selectivity of by-product phenol is a key research focus of industrial catalysts for cyclohexanol dehydrogenation.Copper-silicon catalysts with different aging time(C-1(aging time of 0 min),C-2(aging time of 30 min)and C-3(aging time of 1 h))were prepared by precipitation method,and the effect of aging time on the catalytic performance of the catalysts was investigated.The physical and chemical properties of the catalysts were analyzed by XRD,TEM,H2-TPR,FT-IR and N2 physical adsorption/desorption,and their catalytic performances were investigated.The catalyst(C-2)with the lowest phenol selectivity was selected for industrial production and application analysis.The results show that with extension of aging time,the specific surface area and crystallite size of the active component CuO gradually increase,while the pore volume and average pore size initially increase and then decrease.When the aging time is 30 min,strong interaction between CuO and the support SiO2 is formed.In the dehydrogenation of cyclohexanol to cyclohexanone,the conversion of cyclohexanol is over 51.00％and the selectivity of cyclohexanone is over 98.00％.Among them,C-2 exhibits the lowest phenol selectivity(0.7％),and its industrial application in a cyclohexene hydration method for cyclohexanone production plant further confirms its excellent ability to suppress phenol formation.Under the same preparation conditions,adjusting the aging time can modify the accumulation morphology of the active components and metal-support interactions,thereby influencing the selectivity of specific by-products.关键词
铜硅催化剂/老化时间/物化性质/环己醇脱氢性能/苯酚选择性Key words
copper-silicon catalysts/aging time/physicochemical properties/cyclohexanol dehydrogenation performance/phenol selectivity分类
化学工程引用本文复制引用
彭洁,于杨,王伟,祝东红,李婷婷..老化时间对铜硅环己醇脱氢催化剂副产物苯酚选择性的影响[J].低碳化学与化工,2025,50(4):64-70,7.基金项目
2023年江苏省"卓越博士后计划". （）
