Selective conversion of biomass-derived furfuryl alcohol into n-butyl levulinate over sulfonic acid functionalized TiO_(2) nanotubes  

作　　者：Shuolin Zhou Jinhua Lai Xianxiang Liu Geng Huang Gaolin You Qiong Xu Dulin Yin 

机构地区：[1]Changsha Normal University,Changsha,Hunan,410100,China [2]National&Local Joint Engineering Laboratory for New Petro-chemical Materials and Fine Utilization of Resources,Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province,College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha,Hunan,410081,China

出　　处：《Green Energy & Environment》2022年第2期257-265,共9页绿色能源与环境（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.21606082,21776068);the Hunan Provincial Natural Science Foundation of China(Grant No.2018JJ3334);the Key Scientific Research Fund of Hunan Provincial Education Department(Grant No.19A035);the Collaborative Innovation Center of New Chemical Technologies for Environmental Benignity and Efficient Resource Utilization。

摘　　要：Sulfonic acid functionalized titanate nanotubes were prepared by the sulphonation reaction of hydrothermally synthesized TiO_(2) nanotubes(TNTs) using chlorosulfonic acid as the sulfating agent.The as-prepared catalysts were characterized by fourier transform infrared(FT-IR)spectroscopy,transmission electron microscopy(TEM),scanning electron microscopy-energy dispersive X-ray spectroscopy(SEM-EDX),Xray diffraction(XRD) analysis,thermogravimetry-differential thermal gravimetry(TG-DTG) and X-ray photoelectron spectroscopy(XPS)techniques.The characterization results revealed that the catalysts retained the tubular structure of the TNTs and possessed a large number of active sulfonic acid sites.The catalytic performance of the catalysts for the synthesis of n-butyl levulinate was investigated via the alcoholysis of biomass-derived furfuryl alcohol under atmospheric pressure.The effects of the reaction factors such as the catalyst dosage,reaction time,and temperature on the alcoholysis of the furfuryl alcohol were systematically studied.Under mild conditions,about 79.9% yield of n-butyl levulinate was achieved.In addition,the catalysts showed a stable catalytic performance after four consecutive cycles.Furthermore,no leaching of the active species was observed during the hot filtration testing,which can be attributed to the covalently linked –SO_(3)H groups on the TNTs surface.In addition,the opened tubular nanostructure of the catalyst and the introduced strong Br?nsted acid sites exhibited synergistic effects,which facilitated the selective conversion of the furfuryl alcohol to butyl levulinate.

关 键 词：surface ALCOHOL functional 

分 类 号：TQ225.24[化学工程—有机化工] O643.36[理学—物理化学]