酸处理对以脱脂棉为模板制备Ru/Ba-MgO催化剂的影响  

Effect of acid treatment on the performance of Ru/Ba-MgO catalyst prepared by using degreasing cotton as biological template

作　　者：涂群瑶 程向炜[2] 杨霞珍[1] 霍超[1] 刘化章[1] Tu Qunyao;Cheng Xiangwei;Yang Xiazhen;Huo Chao;Liu Huazhang(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou Zhejiang 310012,China;Zhejiang Police College,Hangzhou Zhejiang 310053,China)

机构地区：[1]浙江工业大学化学工程学院,浙江杭州310012 [2]浙江警察学院,浙江杭州310053

出　　处：《石油化工》2021年第12期1231-1237,共7页Petrochemical Technology

基　　金：浙江省自然科学基金一般项目(LY18B060015,LQ19B060007)。

摘　　要：采用浸渍法,以脱脂棉和经硝酸预处理后的脱脂棉为生物模板,成功制备了具有纤维条状结构的Ba-MgO载体,并等体积浸渍了活性组分Ru,制得了负载型Ru/Ba-MgO氨合成催化剂。运用XRD,FE-SEM,FTIR等方法对所制备纳米Ba-MgO载体的表面性能进行表征,对所负载的Ru基催化剂进行氨合成催化活性评价,并探讨了纤维条状结构Ba-MgO载体的形成机理。实验结果表明,所制备的Ba-MgO载体表面存在卷曲、褶皱等变化,在电子显微镜下可见纳米级颗粒;比表面积和孔体积增大;助催化剂Ba的吸附量增多;Ru/Ba-MgO催化剂应用于氨合成反应的催化活性显著提高,在425℃,10 MPa,GHSV=10000 h^(-1)反应条件下,氨合成反应速率达68.53 mmol/(g·h)。Using degreasing cotton and pre-acid-treated degreasing cotton as biological templates,the ammonia synthesis catalyst with nano-Ba-MgO support and Ru-based active centres were prepared by incipient wetness impregnation method.XRD,FE-SEM,FTIR methods were used to study the properties of the prepared nano-Ba-MgO support.The ammonia synthesis catalysts were evalued and the formation mechanism of Ba-MgO support with fibrous strip structure was also discussed.The results showed that the surface morphology,such as curls and wrinkles,of the support prepared by using acid-treated degreasing cotton as a template had changed,and nano-scale particles can be seen under the electron microscope;the specific surface area and pore volume were increased;the actual adsorption amount of the co-catalyst Ba was increased;the catalytic activity of Ru/Ba-MgO catalyst for ammonia synthesis reaction is significantly improved.Under the reaction conditions of 425℃,10 MPa,and GHSV 10000 h^(-1),the ammonia synthesis reaction rate of Ru/Ba-MgO catalyst reached 68.53 mmol/(g·h).

关 键 词：生物模板 酸处理 Ba-MgO载体 Ru基催化剂 氨合成 

分 类 号：TQ426.8[化学工程]