超声辅助浸渍法制备高分散Pt/CMK-3-US加氢脱萘催化剂
Ultrasound Assisted Synthesis of Highly Dispersed Pt/CMK-3-US as Catalyst for Hydrogenation of Naphthalene
作者单位E-mail
李剑 山西师范大学化学与材料科学学院, 临汾 041004;辽宁石油化工大学石油化工学院, 抚顺 113001  
武海顺 山西师范大学化学与材料科学学院, 临汾 041004  
杨丽娜 辽宁石油化工大学石油化工学院, 抚顺 113001  
杨肖嵘 辽宁石油化工大学石油化工学院, 抚顺 113001  
马波 山西师范大学化学与材料科学学院, 临汾 041004 bomasx@163.com 
摘要: 以CMK-3介孔碳作为载体,分别采用传统浸渍法、超声辅助浸渍法、载体硝酸处理法和表面活性剂辅助浸渍法备了Pt/CMK-3、Pt/CMK-3-US、Pt/CMK-3-HNO3和Pt/CMK-3-CTAB催化剂,并通过表征和催化性能评价进行研究。表征方法包括XRD、BET、SEM、TEM和H2-TPR,结果表明Pt/CMK-3中Pt分散性最差,Pt/CMK-3-HNO3和Pt/CMK-3-CTAB中Pt的分散度较好,但是HNO3对介孔碳的孔道结构有破坏作用,且Pt/CMK-3-HNO3和Pt/CMK-3-CTAB中的介孔碳的表面性质具有明显变化,只有超声法可以在很好地保持CMK-3的孔道结构和表面性质的基础上提高铂的分散度,Pt的粒径在3 nm左右。萘加氢催化性能评价结果表明Pt/CMK-3-US的催化加氢活性及产物选择性高于Pt/CMK-3,且明显高于Pt/CMK-3-HNO3和Pt/CMK-3-CTAB。萘转化率可以达到98%以上,十氢萘选择性可以达到95%以上。
关键词: 介孔碳  铂催化剂  超声处理  分散度  加氢脱萘
基金项目: 辽宁省教育厅项目(No.L2016018),辽宁省高等学校杰出青年学者成长计划(No.LJQ2015062)资助。
Abstract: With CMK-3 mesoporous carbon as support Pt/CMK-3, Pt/CMK-3-US, Pt/CMK-3-HNO3 and Pt/CMK-3-CTAB were synthesized by traditional impregnation method, ultrasound assisted impregnation method, treating support with HNO3 and surfactant assisted impregnation method respectively. Catalysts were characterized and their catalytic performances were evaluated. Characterizations including XRD, BET, SEM, TEM and H2-TPR results showed that the dispersion of Pt in Pt/CMK-3 is the worst, Pt can disperse well in Pt/CMK-3-HNO3 and Pt/CMK-3-CTAB, however, HNO3 may destroy the pore structure of CMK-3, and the surface properties of CMK-3 in Pt/CMK-3-HNO3 and Pt/CMK-3-CTAB have obvious changes. Only the ultrasound assisted impregnation method can improve the dispersion of Pt based on the maintenance of the pore structure and surface properties of CMK-3, the particle size of Pt is about 3 nm. The catalytic activity and selectivity of Pt/CMK-3-US were higher than Pt/CMK-3, and much higher than Pt/CMK-3-HNO3 and Pt/CMK-3-CTAB. Conversion of naphthalene is over 98% and the selectivity for dekalin is more than 95%.
Keywords: mesoprous carbon  Pt catalyst  ultrasonic assisted treatment  disperse  hydrogenation of naphthalene
投稿时间:2016-09-30 最后修改时间:2016-12-19
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李剑,武海顺,杨丽娜,杨肖嵘,马波.超声辅助浸渍法制备高分散Pt/CMK-3-US加氢脱萘催化剂[J].无机化学学报,2017,33(4):583-588.
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