超临界甲醇中CuO-ZnO/Al_2O_3催化微晶纤维素的液化研究  

Catalytic liquefaction research on microcrystalline cellulose in supercritical methanol

作　　者：马依文[1,2] 包桂蓉[1,2] 陈新怡[1,2] 王青青[1,2] 李法社[1,2] 

机构地区：[1]昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室,云南昆明650093 [2]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《云南大学学报（自然科学版）》2016年第3期455-463,共9页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(51266003)

摘　　要：在超临界甲醇中使用CuO-ZnO/Al2O3复合氧化物催化液化微晶纤维素,考察了反应温度、反应时间、催化剂用量、甲醇填充率对微晶纤维素转化率的影响,并通过正交实验确定其最佳反应条件：反应温度280℃,反应时间90 min,催化剂用量125%、甲醇填充率60%.通过FT-IR和GC-MS对其催化液化产物进行分析,结果表明在超临界甲醇中,微晶纤维素主要发生热解与醇解反应,纤维素大分子分解形成小分子化合物,添加催化剂可促进小分子化合物脱水并进行加氢重整,得到C2-C7醇类为主要液化产物.Direct liquefaction of micro- crystalline cellulose over CuO-ZnO/Al2O3 catalyst in supercritical methanol was investigated.The effects of liquefaction temperature,liquefaction time,dosage of catalyst and filling ratio of methanol on the microcrystalline cellulose conversion were investigated.The experimental results from orthogonal matrix showed the optimum liquefaction conditions were that： reaction temperature 280 ℃,reaction time90 min,125% dosage of catalyst,60% filling ratio of methanol.The analysis of FT-IR and GC-MS indicated that pyrolysis and alcoholysis reaction mainly occurred in the microcrystalline cellulose,cellulose molecules had broken down to small molecule compounds and adding catalyst can promote small molecular compound to hydrodeoxygenate.The main liquefied products are C2—C7 alcohol.

关 键 词：微晶纤维素 超临界甲醇 CuO-ZnO/Al2O3 催化液化 

分 类 号：TK6[动力工程及工程热物理—生物能]