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| 酸碱性浸渍条件对钯炭催化剂加氢性能的影响 |
| Effect of acid/base impregnation conditions on hydrogenation performance of palladium carbon catalysts |
| Received:October 14, 2020 |
| DOI： |
| 中文关键词: 钯炭催化剂 浸渍pH 加氢反应 苯甲醛 2-氰基吡啶 |
| 英文关键词: Pd/C catalyst impregnation pH hydrogenation benzaldehyde 2-cyanopyridine |
| 基金项目:国家自然科学基金(51801235)；湖南省自然科学基金(2018RS3019，2019JJ30033) |
| Author Name | Affiliation | E-mail | | WANG Liu-feng | Zhejiang NHU Company Ltd., Shaoxin 312500, Zhejiang, China | wangliufeng@cnhu.com | | XU Zhi-chao | Zhejiang NHU Company Ltd., Shaoxin 312500, Zhejiang, China | | | LI Qi | School of Materials Science and Engineering,Central South University, Changsha 410083, China | | | WANG Liang-bing | School of Materials Science and Engineering,Central South University, Changsha 410083, China | wanglb@csu.edu.cn |
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| 中文摘要: |
| 采用氢氧化钠和盐酸调节钯炭(Pd/C)催化剂制备过程中的浸渍液的pH，制备了相应的钯炭催化剂。对Pd/C催化剂的成分、形貌等性质进行表征分析，研究了不同浸渍条件下制备的Pd/C催化剂对苯甲醛和2-氰基吡啶加氢的催化性能。结果表明，酸/碱浸渍方法可有效控制钯颗粒的尺寸大小及分散度。在浸渍液的pH值为3的条件下制备出的Pd/C-1#催化剂平均粒径为2.78 nm。当浸渍液的pH值为10时，制备的Pd/C-2#催化剂平均粒径为3.75 nm。对于2-氰基吡啶加氢，采用酸性浸渍条件制备的Pd/C催化剂具有更好的催化效果；而采用碱性浸渍条件制备的Pd/C-2#催化剂对苯甲醛加氢效果更好。 |
| 英文摘要: |
| The pH of impregnation solutions was first adjusted by sodium hydroxide and hydrochloric solution, then prepared corresponding Pd/C catalysts. Their properties were characterized by XRD, BET and TEM. The hydrogenation performance of the Pd/C catalysts prepared under different immersion pH on benzaldehyde and 2-cyanopyridine was studied. The results showed that the acid/base impregnation condition could effectively control the size and dispersion of palladium particles. For the catalyst (Pd/C-1#) prepared by using a pH3 impregnation solution, its average Pd particle size was 2.78 nm, while for the Pd/C-2# catalyst prepared by using a pH10 immersion solution, its average particle size was 3.75 nm. The Pd/C-1# catalyst impregnated under acidic condition possesses a better conversion rate and selectivity in the hydrogenation of 2-cyanopyridine, while the Pd/C-2# catalyst impregnated under alkaline condition has high conversion rate and selectivity for the hydrogenation of benzaldehyde. |
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