| 徐三魁,王晓栋,李利民,李蕊,苏运来.超临界甲醇处理对Ru/C催化剂结构及性能的影响[J].分子催化,2010,(6):0 |
| 超临界甲醇处理对Ru/C催化剂结构及性能的影响 |
| Effect of Supercritical Methanol Treatment on the Property and Structure of Ru/AC Catalysts |
| 投稿时间：2010-10-08 修订日期：2010-11-03 |
| DOI： |
| 中文关键词: 超临界 活性碳 钌基催化剂 表面基团 葡糖糖加氢 |
| 英文关键词:supercritical fluid activated carbon ruthenium catalyst surface group glucose hydrogenation |
| 基金项目: |
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| 摘要点击次数: 1824 |
| 全文下载次数: 2635 |
| 中文摘要: |
| 采用超临界甲醇处理活性炭 ，水浸渍制备负载钌碳催化剂，用N2物理吸附、Boehm滴定、X光电子能谱仪（XPS）、程序升温还原（TPR）、扫描电镜（SEM）等表征手段，研究了超临界甲醇处理活性炭对活性碳表面结构、表面基团含量，及Ru/C催化剂的还原性能、钌的分布情况的影响。并以葡萄糖加氢生产山梨醇为模型反应对负载钌基催化剂的性能进行了评价。研究结果表明，超临界甲醇处理活性炭，活性碳的孔结构性能变化不大，但可有效降低活性炭表面含氧酸性基团的含量，有效提高钌的分散度，使催化剂的还原温度升高，增强了载体和活性组分钌间的相互作用，增大了钌的电子结合能，从而有效的提高所负载催化剂的催化活性。在实验范围内，当超临界甲醇的温度为300℃，处理时间为12 h以上时，在4.0MPa,120℃,葡萄糖浓度为50%（ w/w）反应条件下，催化剂的反应速率达到了 118.65 mmol?min-1g-1Ru，是未处理活性碳的1.96倍。 |
| 英文摘要: |
| The effects of supercritical fluid treatment on the structure , surface groups , surface texture of activated carbon(AC) as well as the structure and activity of Ru/ AC catalyst for sorbitol from hydrogenation of glucose were investigated by means of N2 physisorption, Boehm titration ,XPS ,SEM and TPR .The result showed that supercritical fluid treatment did not remarkably change the surface structure of activated carbon, but resulted in considerable decreased in the surface acidic groups. Thus Ru deposited on them will assemble .These led to higher ?dispersion of Ru ，increase the reduced temperature of Ru and enhanced the activity of the catalysts prepared by impregnation of AC supported with RuCl3 solution. The activity of Ru/ AC catalysts for hydrogenation of glucose were tested under 4.0 Mpa 、temperature 120 ℃.The results showed that activities of Ru/ AC catalysts prepared by supercritical fluid treatment were great increased, and the highest reaction rate for hydrogenation of glucose reached 118.65 mmol?min-1g-1Ru ,which exhibited 1.96 times higher than that without treatment. |
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