低碳化学与化工2025，Vol.50Issue(12)：66-74,9.DOI:10.12434/j.issn.2097-2547.20250049
Zn、Al负载Cu/SiO2催化环己醇脱氢制环己酮的性能研究
Study on catalytic performances of Zn and Al loaded Cu/SiO2 for dehydrogenation of cyclohexanol to cyclohexanone
摘要
Abstract
Cu/SiO2 exhibits excellent catalytic performance and is widely used in dehydrogenation of cyclohexanol to cyclohexanone.However,Cu/SiO2 tends to sinter at high temperatures,leading to agglomeration of the active components and a shortened service life.Cu/SiO2 with different Cu loadings(calculated by mass fraction of CuO)were prepared using the co-precipitation method.Based on Cu/SiO2 with the Cu loading of 10.0%,Cu-Zn/SiO2,Cu-Al/SiO2 and Cu-Zn-Al/SiO2 were further prepared.The catalytic performances of catalysts in dehydrogenation of cyclohexanol to cyclohexanone were studied.And the crystal structures and textural properties of catalysts were characterized by XRD and N2 adsorption/desorption,etc.The results show that Cu-Zn-Al/SiO2(m(CuO)∶m(ZnO)∶m(Al2O3)=10∶2∶1)exhibits the best catalytic performance with cyclohexanol conversion rate,cyclohexanone selectivity and cyclohexanone yield of 72.3%,98.3%and 71.1%,respectively,under the reaction conditions of reaction temperature of 240 ℃,reaction pressure of 1.01×105 Pa and space velocity of 3.6 h-1 for 4 h,Additionally,the catalyst maintains stable catalytic performance over 24 h.The introduction of ZnO in Cu/SiO2 can inhibit the migration and aggregation of the active component Cu,improves its dispersion during the reduction process and slows down Cu grain growth.The introduction of Al2O3 can enhance the interaction between the active component Cu and the SiO2 support,thereby improving thermal stability of the catalyst.关键词
Cu基催化剂/环己醇脱氢/环己酮/热稳定性Key words
Cu-based catalysts/dehydrogenation of cyclohexanol/cyclohexanone/thermal stability分类
化学化工引用本文复制引用
段姣杰,王明义,张贵珠,丁传敏,王俊文..Zn、Al负载Cu/SiO2催化环己醇脱氢制环己酮的性能研究[J].低碳化学与化工,2025,50(12):66-74,9.基金项目
国家自然科学基金(22308244). （22308244）
