介孔磷酸锆固体酸催化剂的制备及其催化性能  

Preparation of mesoporous zirconium phosphate and its catalytic performace in the preparation of cellulose from glucose

作　　者：于波 刘超[1] 刘金东 丁万昱[1] 柴卫平[1] YU Bo;LIU Chao;LIU Jindong;DING Wanyu;CHAI Weiping(College of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,Liaoning,China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《化工进展》2018年第6期2236-2241,共6页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金项目(21303185)

摘　　要：采用水热法制备了介孔磷酸锆固体酸催化剂,通过X射线衍射、傅里叶红外光谱、氮气吸附法、氨气程序升温等表征方法对该催化剂进行了表征,结果表明该催化剂具有介孔结构、较高的比表面积及较多的Br?nsted酸性位,将该催化剂应用于纤维素水解制葡萄糖反应体系中,较适宜的反应条件为反应温度160℃、反应时间4h、催化剂用量与微晶纤维素原料比1∶3,单次反应纤维素转化率和葡萄糖选择性可达到50%,5次循环反应后纤维素累积转化率达到80%,在整个过程中催化剂并未发生明显失活,这表明该催化剂的纯单一磷酸锆(Zr PO)结构有利于提高其热稳定性,介孔磷酸锆固体酸催化剂在纤维素水解实验中表现出很大的潜力,可作为非均相固体酸催化剂用于葡萄糖生产以减少无机酸的应用。Mesoporous zirconium phosphate catalyst was prepared using the hydrothermal method,and its mesoporous structure and acidic properties were investigated using X-ray diffraction,Foutier transform infrared radiation, NH3 temperature programmed desorption and nitrogen adsorption-desorption methods. In the screening tests, the as-prepared ZrPO sample exhibited promising catalytic behavior for glucose production probably due to its high surface area,porous structure and the abundent Brosted acid sites. The cellulose conversion and the glucose selectivity could reach 50% at mild conditions（160℃,4 h）after the ball milling pretreatment. The cumulative conversion of cellulose remained to be 80% after five recycles,indicating the reusability of the catalyst. Noticeably,the ZrPO catalyst could be repeatedly used without any obvious deactivation. Generally,the ZrPO catalyst studied in this work possessed a great potential as an efficient heterogeneous solid acid catalyst for glucose production to diminish the application of homogeneous mineral acid.

关 键 词：催化剂 多孔介质 生物催化 水解 磷酸锆 纤维素 葡萄糖 

分 类 号：O643.3[理学—物理化学]