丝瓜络炭磺酸的制备及其催化合成糠醛  

Preparation of Char Sulfonic Acid Catalyst from Luffa Cylindrica for Synthesis of Furfural

作　　者：刘建平[1] 杨小敏[1] 王淑怡[1] 吴丽丽[1] 胡林[1] 

机构地区：[1]华东交通大学化学化工系,南昌330013

出　　处：《化学通报》2014年第12期1224-1228,共5页Chemistry

基　　金：国家自然科学基金项目(31160187);江西省教育厅项目(GJJ11680);华东交通大学研究生创新基金项目(YC2012-X019)资助

摘　　要：以丝瓜络为炭源、浓硫酸为磺酸化试剂,制备了丝瓜络炭磺酸催化剂。利用中和滴定、X射线衍射、傅里叶变换红外光谱和热重-差热分析等手段对催化剂进行了表征。以表面酸密度为考察指标,确定了在300℃炭化3h、在80℃下磺化3h为优化的催化剂制备条件,此条件下丝瓜络炭磺酸催化剂表面酸密度可达1.119mmol/g。以木糠水解制备糠醛为探针反应,通过正交实验法考察了催化剂的实际催化活性。结果表明,在水解反应时间2h、水解反应温度200℃和催化剂用量占原料质量10%时,糠醛的平均收率达到78.69%,此时催化剂的催化活性最高。催化剂经第一次循环使用后性能有所下降,但随后的循环使用催化性能稳定。将使用过的催化剂经再磺化,可基本恢复到新制催化剂的催化活性。A char sulfonic acid catalyst was prepared by sulfonation from Luffa Cylindrica as raw materials and characterized by neutralization titration,XRD,FT IR and TG-DTA. The preparation conditions of the catalyst were optimized using the acid density as the observed indexes. The results showed that the acid density of catalyst prepared under the optimal conditions,i. e. carbonization at 300 ℃ for 3 h and then sulfonation at 80℃ for 3 h,can reach1. 119 mmol / g,which means it exhibits the high catalytic activity. The hydrolysis of xylose to furfural was taken as the model reaction to investigate the activity of the catalyst in practical application using orthogonal experiment design. It was found that the furfural yield could reach up to 78. 69% when using 10（ wt） % catalysts at 200℃ for 2h. The catalyst performance was stable although it had dropped after the first run,and the activities can be fully restored through re-sulfonated.

关 键 词：丝瓜络 炭磺酸 木糠 糠醛 

分 类 号：O643.36[理学—物理化学]