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| 毕赤酵母还原制备Ag/ZrO2催化剂及其催化1,2-丙二醇选择氧化反应研究 |
| Preparation of Ag/ZrO2 Catalyst with Microorganism-mediated Biosynthesis method by using Pichia Pastoris for selective oxidation of 1,2-propanediol |
| 投稿时间：2014-08-06 |
| DOI： |
| 中文关键词: 催化化学 微生物还原 银催化剂 1,2-丙二醇 毕赤酵母 |
| 英文关键词: catalytic chemistry microorganism-mediated biosynthesis Ag catalysts 1,2-propanediol Pichia pastoris |
| 基金项目:稀贵金属综合利用新技术国家重点实验室开放课题(SKL-SMP-201210)。 |
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| 中文摘要: |
| 将微生物还原法制备银纳米颗粒的技术引入到催化剂的制备当中，以毕赤酵母菌体干粉作为还原剂制备纳米银粉，采用溶胶负载法将银负载获得Ag/ZrO2催化剂，利用TEM、XRD、UV-Vis DRS等方法对催化剂进行了表征，并将所制备的催化剂用于1,2-丙二醇选择氧化制备丙酮醛的反应中。研究表明，在1,2-丙二醇的空速为5.2 h-1，反应温度340℃时，450℃下焙烧的银负载量为8%的Ag/ZrO2催化剂获得了最佳的催化反应性能，1,2-丙二醇的转化率达到96.8%，丙酮醛的选择性达到78.3%。 |
| 英文摘要: |
| Ag/ZrO2 catalysts for the selective oxidation of 1,2-propanediol to methylglyoxal with molecular oxygen were prepared by an immobilization method based on the microorganism-mediated biosynthesis process with Pichia pastoris. The catalyst was characterized by XRD, TEM, UV-Vis DRS and TG techniques. The effects of reaction conditions (temperature and space velocity), Ag loading amount and calcination temperature of the as-produced Ag/ZrO2 catalysts on the catalytic performance were investigated. And the results showed that the 8% Ag/ZrO2 catalyst calcined at 450℃ exhibited the best catalytic activity with 96.8% 1,2-propanediol conversion and 78.3% methylglyoxal selectivity. |
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