林产化学与工业2025，Vol.45Issue(3)：27-36,10.DOI:10.20195/j.issn.0253-2417.2024051
Ni-HAP催化剂的制备及其催化乙醇Guerbet缩合制备高碳醇
Preparation of Ni-HAP Catalyst and Its Application in Catalyzing Guerbet Condensation of Ethanol for Higher Alcohols Synthesis
摘要
Abstract
To address the challenges of low yield and harsh reaction conditions in the Guerbet condensation of bioethanol for synthesizing higher alcohols(C4-8 alcohols),this study prepared X-Y(X=Co,Cu,Ni;Y=HAP,MgO,Al2O3,CeO2)catalysts via the impregnation method.The catalysts were characterized using X-ray diffraction(XRD),X-ray photo electron spectroscopy(XPS)and other techniques,and their catalytic performances in ethanol Guerbet condensation were evaluated.Results demonstrated that the 10％Ni-HAP-450 catalyst,with 10％Ni loading and calcined at 450 ℃,exhibited optimal performance.Under optimized conditions(250 ℃,6 h),ethanol conversion reached 70.0％,with a C4-8 alcohols yield of 18.5％.The catalyst displayed excellent stability and reusability,retaining ethanol conversion of 54.6％and C4-8 alcohols yield of 17.0％after four reuse cycles.Characterization revealed the structural and acid-base properties governed the catalytic mechanism.The catalyst calcined at 450 ℃ exhibited the largest pore volume when the Ni loading was 10％,while the appropriate Ni loading enhanced active metal dispersion.Temperature programmed desorption(TPD)of CO2(CO2-TPD)and NH3-TPD analyses confirmed the coexistence of moderate-strength basic and acidic sites.During the reaction,basic sites catalyzed aldol condensation for carbon-chain elongation,while metallic centers synergized with acid-base sites to drive the Guerbet reaction,enabling efficient formation of long-chain aliphatic alcohols.关键词
酸碱性质/羟基磷灰石/Guerbet反应/高碳醇Key words
acid-base properties/hydroxyapatite/Guerbet reaction/higher alcohols分类
化学化工引用本文复制引用
褚佳昕,张兴华,房振全,庄修政,马隆龙..Ni-HAP催化剂的制备及其催化乙醇Guerbet缩合制备高碳醇[J].林产化学与工业,2025,45(3):27-36,10.基金项目
国家自然科学基金资助项目(52236010) （52236010）
