林产化学与工业2024，Vol.44Issue(2)：79-86,8.DOI:10.3969/j.issn.0253-2417.2024.02.011
双功能炭基固体酸的制备及其催化纤维二糖醇解
Preparation of Bifunctional Carbon-based Solid Acid and Its Catalytic Alcoholysis of Cellobiose
摘要
Abstract
Chitosan was used as a carbon source to prepare iron-loaded nitrogen-containing activated carbon(ACN-Fe)through metal impregnation and high-temperature carbonization.A series of metal-loaded dual-functional carbon-based solid acid(ACN-Fe-SO3H)catalysts were further prepared by hydrothermal sulfonation.The catalysts were applied to catalyze the alcoholysis of cellobiose.The catalysts were characterized in detail using X-ray diffraction(XRD),Raman spectroscopy,Fourier-transform infrared spectroscopy(FT-IR),N2 adsorption/desorption,X-ray photoelectron spectroscopy(XPS),inductively coupled plasma optical emission spectrometry(ICP-OES),and acid-base titration.The results showed that the unsaturated trivalent iron ions in the catalyst had Lewis acidity,while the sulfonic acid groups exhibited Brønsted acidity.The catalyst prepared at a carbonization temperatureof800℃(800-ACN-Fe-SO3H)possessed the strongest acidity(acidity of 0.81 mmol/g)and the best structural characteristics(specific surface area of 85.7 m2/g),showing the best catalytic performance.With a catalyst dosage of 0.20 g,a reaction temperature of 200℃,and a reaction time of 5 h,the cellobiose conversion rate reached99.6%,with yields of levulinic acid(LA)and methyl levulinate(ML)of 15.6%and 62.1%,respectively.After 5 cycles,the cellobiose conversion rate remained 93.1%,with a product yield of 51.1%,indicating good catalyst reusability.Additionally,a preliminary exploration of the reaction mechanism of cellobiose alcoholysis was conducted.关键词
生物质催化转化/碳基固体酸/纤维二糖/乙酰丙酸/乙酰丙酸甲酯Key words
catalytic conversion of biomass/carbon-based solid acid/cellobiose/levulinic acid/methyl levulinate分类
化学化工引用本文复制引用
范腾,张荣花,王奎,潘晖,冯君锋..双功能炭基固体酸的制备及其催化纤维二糖醇解[J].林产化学与工业,2024,44(2):79-86,8.基金项目
国家自然科学基金资助项目(32101469) （32101469）
