高加氢脱氧活性Co-P-B非晶态催化剂的制备及性能研究  

Preparation and performance of amorphous Co-P-B catalyst with high hydrodeoxygenation activity

作　　者：王威燕[1] 刘鹏利[1] 杨司军 乔治强[1] 杨运泉[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《中国科技论文》2015年第6期735-739,744,共6页China Sciencepaper

基　　金：高等学校博士学科点专项科研基金资助项目(20124301120009);国家自然科学基金资助项目(21306159)

摘　　要：以(NH4)2SO4和Na3C6H5O7为缓冲剂,采用化学还原法制备了不同P/B物质的量比的Co-P-B非晶态催化剂。在缓冲溶液的作用下,部分Co2+还原成Co0。制备的Co-B和Co-P-B均为非晶态结构,在Co-B中添加了P之后,催化剂颗粒的尺寸显著增大。随着初始反应溶液中P/B物质的量比的增大,催化剂表面B/Co和P/Co物质的量比、Co0的摩尔分数都增加了,但是比表面积减小。在对甲苯酚的加氢脱氧(HDO)反应中,Co-P-B表现出优良的催化活性,498K下,催化对甲苯酚的脱氧率高达97.4%,产物中甲基环己烷的选择性达到91.2%。主要的HDO反应路径为氢化-氢解,该路径可同时降低反应温度及产物中芳烃化合物的含量。Based on the chemical reduction method,Co-P-B catalysts with different P/B molar ration were synthesized by adding（NH4）2SO4and Na3C6H5O7 as buffer agent.Some of Co2＋was reduced to Co0 under the effect of buffer solution.The prepared Co-B and Co-P-B exhibited amorphous structure and the particle size increased greatly after adding P into Co-B.With the increase of P/B molar ratio in the raw material,the B/Co,P/Co molar ratio and Co0 relative content on the catalyst surface increased,but the surface area decreased.In the hydrodeoxygenation（HDO）of p-cresol,Co-P-B exhibited a high catalytic activity.The deoxygenation degree was high to 97.4% with a seslectivty of 91.2% methylcyclohexane at 498 K.The dominant HDO reaction pathway was hydrogenation-dehydration,which decreased both the aromatic content in the product and the reaction temperature.

关 键 词：化学工程 加氢脱氧 Co-P-B非晶态催化剂 化学还原法 对甲苯酚 

分 类 号：TQ426.94[化学工程]