Ni-WO_3/SBA-15催化剂上纤维素的水解加氢  

Hydrolytic hydrogenation of cellulose over Ni-WO_3/SBA-15 catalysts

作　　者：曹月领[1,2] 王军威[1] 李其峰[1] 殷宁[1] 刘振民[1] 亢茂青[1] 朱玉雷[1] 

机构地区：[1]中国科学院山西煤炭化学研究所,山西太原030001 [2]中国科学院大学,北京100049

出　　处：《燃料化学学报》2013年第8期943-949,共7页Journal of Fuel Chemistry and Technology

基　　金：国家重点基础研究发展规划(973计划;2012CB215305)

摘　　要：采用等体积浸渍法制备了Ni-WO3/SBA-15催化剂,将其应用于纤维素的水相氢解。考察了温度对纤维素水解和其形貌的影响及Ni、WO3含量等对纤维素转化行为的影响。XRD表征结果表明,随着温度的升高纤维素颗粒粒径逐渐变小并趋于均一,结晶状态逐渐由晶型变为无定型态。H2-TPR结果表明,Ni和WO3间存在较强的相互作用,这种相互作用提高了W物种对C-C键的解离性能,同时,提高了Ni物种的加氢活性,促进了纤维素向乙二醇的转化。在3%Ni-15%WO3/SBA-15催化剂上,反应条件为230℃、6.0 MPa、6.0 h时,纤维素完全转化,乙二醇的产率达到70.7%。Series of non-precious metal catalysts Ni-WO3/SBA-15 were prepared by means of incipient impregnation and applied to the hydrogenalysis of cellulose in aqueous solution. The effect of reaction temperature on the hydrolysis and morphology of cellulose, and the influence of Ni, WO3 loading on the conversion of cellulose were investigated. High crystalline cellulose was transformed gradually into amorphous state with the increase of reaction temperature. HE temperature program reduction of the catalyst proved that a strong interaction existed between nickel and tungsten trioxide, which enhanced the ability of tungsten species to the cleavage of C-C bond and the activity of hydrogenation of nickel. Thus, the transformation of cellulose into ethylene glycol was strengthened markedly. The complete conversion of cellulose and 70.7% ethylene glycol yield were obtained over a 3 % Ni-15 % WO3/SBA-15 catalyst under the reaction condition of 230 0（2 and 6.0 MPa H2 for 6.0 h.

关 键 词：纤维素 Ni-WO3 SBA-15 氢解 乙二醇 

分 类 号：O643.38[理学—物理化学]