高黏附性Pd/SiO_(2)/NF整体式催化剂的制备及加氢性能研究  

Preparation of high adhesion Pd/SiO_(2)/NF monolithic catalyst and its hydrogenation performance

作　　者：韩宇 周乐 张鑫 罗勇[1] 孙宝昌[1] 邹海魁[1] 陈建峰[1] HAN Yu;ZHOU Le;ZHANG Xin;LUO Yong;SUN Baochang;ZOU Haikui;CHEN Jianfeng(Research Center of the Ministry of Education for High Gravity Engineering and Technology,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学教育部超重力工程研究中心,北京100029

出　　处：《化工学报》2024年第4期1533-1542,共10页CIESC Journal

基　　金：国家重点研发计划项目(2022YFA1504401)。

摘　　要：旋转填充床反应器(RPB)中液体的高速冲刷和较强的离心力容易导致整体式催化剂的涂层和活性组分从基体表面脱落造成损失,限制了整体式催化剂在RPB反应器中的应用。因此,研究整体式催化剂涂层和活性组分的黏附性,以提升催化剂在RPB反应器中的催化活性和使用寿命具有重要意义。基于此,采用超重力喷涂法在泡沫镍(NF)基体表面负载氧化硅(SiO_(2))涂层,制备了具有高黏附性的Pd/SiO_(2(x))/NF整体式催化剂,通过超声振荡、BET、XRD、SEM和XPS等对整体式催化剂进行测试和分析。当RPB反应器的转速为1200 r/min时,整体式催化剂具有优异的黏附性能,涂层的脱落率为4%。以对硝基苯甲醚(PNA)催化加氢制备对氨基苯甲醚(PA)为探针反应,RPB反应器中Pd/SiO_(2(1200))/NF整体式催化剂具有较好的催化活性,180 min时PNA转化率为98.9%。本工作可为开发高黏附性的整体式催化剂提供新的途径。The high-speed scouring and strong centrifugal force of the liquid in the rotating packed bed reactor(RPB)can easily cause the coating and active components of the monolithic catalyst to fall off the surface of the matrix and cause losses,which limits the application of monolithic catalysts in RPB reactors.Therefore,it is important to investigate the adhesion of coatings and active components to improve the catalytic activity and lifetime of monolithic catalysts in the RPB reactor.In this work,the SiO_(2)coating was deposited on nickel foam by the high gravity spraying method to prepare Pd/SiO_(2(x))/NF monolithic catalysts.The monolithic catalysts were characterized by ultrasonic oscillation test,BET,XRD,SEM and XPS.When the rotational speed was 1200 r/min,the monolithic catalyst had the excellent adhesion performance,and the mass loss rate of the coating was 4%.The Pd/SiO_(2(1200))/NF monolithic catalyst exhibited good catalytic activity in the hydrogenation of p-nitroanisole(PNA)to p-aminoanisole(PA)reaction in the RPB reactor,and the conversion of PNA was 98.9%within 180 min.This work provides a new strategy for the development of stable monolithic catalysts.

关 键 词：旋转填充床反应器 整体式催化剂 黏附性 催化加氢 

分 类 号：TQ021.8[化学工程]