碳载体对Pd/C催化剂上合成五甲基二乙烯三胺选择性的影响  

EFFECTS OF CARBON SUPPORTS IN Pd/C CATALYSTS ON THE SELECTIVITY OF PENTAMETHYLDIETHLENETRIAMINESYNTHESIS

作　　者：何浩宇 焦宏伟 陈晓蓉[1,2] 梅华 He Haoyu;Jiao Hongwei;Chen Xiaorong;Mei Hua(College of Chemistry and Chemical Engineering, Nanjing University of Technology ,Nanjing 210009,Jiangsu, China;Catalytic Hydrogenation Engineering Technology Research Center, Nuomengchem,Nanjing 210009, Jiangsu, China)

机构地区：[1]南京工业大学化学化工学院,江苏南京210009 [2]南京(诺盟化工)催化氢化工程技术研究中心,江苏南京210009

出　　处：《精细石油化工》2018年第3期1-5,共5页Speciality Petrochemicals

摘　　要：以活性碳(AC)和介孔碳(MC)为载体,采用浸渍法分别制备了Pd负载量为15%的Pd/AC和Pd/MC催化剂,采用物理吸附(BET),X射线衍射(XRD),热重分析(TG),透射电镜分析(TEM)和H_2程序升温脱附(H_2-TPD)对试样的理化性质进行分析。考察了Pd/AC和Pd/MC催化剂上二乙烯三胺(DETA)与甲醛加氢合成五甲基二乙烯三胺(PMDETA)的催化性能。结果表明:与Pd/AC相比,Pd/MC具有更大的比表面积和孔径、丰富的中孔孔容和更小的Pd颗粒尺寸及更高的氢吸附能力;Pd/MC具有较高的催化性能,DETA转化率为100%,PMDETA选择性达到97%;中孔对Pd颗粒空间限制特性使得Pd在MC表面分散较高,15次重复使用后仍具有高稳定性。Pd/AC and Pd/MC catalysts were prepared by impregnent method with using active carbon（AC）and mesoporous carbon（MC）as supports.Pd content was 15%.The physico-chemical properties of the samples were analyzed by specific sufrace area（BET）,X ray diffraction（XRD）,thermogravimetric analysis（TG）,transmission electron microscopy（TEM）and H2 temperature programmed desorption of（H2-TPD）.The catalytic performance of Pd/AC and Pd/MC catalystswas investigated for pentanethyldiethylenetriamine（PMDETA）synthesis by hydrogenation of ethyldiethylenetriamine and formaldehyde.The results showed Pd/MC had a larger specific surface area,larger pore size,richer mesoporous volume,smaller Pd particles size and higher hydrogenadsorption capacity.Pd/MC had higher catalytic activity.DETA conversion was 100% and PMDETA selectivity was up to 97% over Pd/MC catalysts.Because of the space restriction characteristic of MC,Pd particles were well dispersed on MC and highly stable after reusing 15 times.

关 键 词：钯碳催化剂 介孔碳 加氢反应 二乙烯三胺 五甲基二乙烯三胺 

分 类 号：O643.36[理学—物理化学]