载体预处理对苯酚加氢制环己酮用催化剂的影响  

Effect of Support Pretreatment on Catalyst for Hydrogenation of Phenol to Cyclohexanone

作　　者：方礼理 闫江梅 李岳锋 刘春红 FANG Li-li;YAN Jiang-mei;LI Yue-feng;LIU Chun-hong(Xi’an Catalyst New Materials Co.,Ltd.,Xi’an Shaanxi 710201,China;National&Local Joint Engineering Research Center for New Noble Metal Catalysts R&D Technology,Xi’an Shaanxi 710201,China;Shanxi Key Laboratory of Catalytic Materials and Technology,Xi’an Shaanxi 710201,China)

机构地区：[1]西安凯立新材料股份有限公司,陕西西安710201 [2]新型贵金属催化剂研发技术国家地方联合工程研究中心,陕西西安710201 [3]陕西省催化材料与技术重点实验室,陕西西安710201

出　　处：《辽宁化工》2023年第12期1752-1755,共4页Liaoning Chemical Industry

基　　金：贵金属催化材料制备及应用技术创新团队(项目编号:2020TD-007);精细化工用固定床催化氢化技术及其催化剂研发和产业化(项目编号:2021CGKC-01)。

摘　　要：采用不同试剂改性活性炭,制备苯酚加氢制环己酮用催化剂。对改性后活性炭的比表面积、孔容、孔径物理性质和钯炭催化剂进行表征,探究不同试剂预处理对活性炭及钯炭催化剂的影响。结果表明:氧化预处理使活性炭的比表面积和孔容下降,使钯炭催化剂上的钯粒子尺寸相对更小;碱预处理有一定的扩孔作用,使钯炭催化剂上的钯粒子尺寸更大;酸处理会增大活性炭的比表面积、孔容、孔径,同时会提高苯酚加氢反应中环己酮的选择性;HNO3处理的活性炭制备的催化剂在苯酚加氢反应中,苯酚转化率和环己酮选择性最高。Different reagents were used to modify activated carbon to prepare catalysts for hydrogenation of phenol to cyclohexanone.The specific surface area,pore volume,pore size and physical properties of the modified activated carbon and the palladium-carbon catalyst were characterized.The results showed that the specific surface area and pore volume of the activated carbon by oxidative pretreatment decreased,and the palladium particles of Pd/C catalyst were relatively small.The alkali treatment had a certain effect of enlarging pore,and Pd/C catalyst had larger Pd particles.Acid treatment increased the specific surface area,pore volume and pore diameter of activated carbon,and improved the selectivity of cyclohexanone in phenol hydrogenation.In the hydrogenation of phenol over HNO3-treated activated carbon,the conversion of phenol and the selectivity of cyclohexanone were the highest.

关 键 词：预处理 钯炭催化剂 苯酚加氢 环己酮 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]