| 非碱性条件下不同粒径的碳载体负载Pt催化剂上甘油的选择性氧化(英文) |
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| 引用本文： | 张梦媛,梁丹,聂仁峰,吕秀阳,陈平,侯昭胤. 非碱性条件下不同粒径的碳载体负载Pt催化剂上甘油的选择性氧化(英文)[J]. 催化学报, 2012, 33(8): 1340-1346 |
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| 作者姓名： | 张梦媛 梁丹 聂仁峰 吕秀阳 陈平 侯昭胤 |
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| 作者单位： | 1. 浙江大学化学系催化所,浙江杭州,310028
2. 浙江大学化学工程与生物工程系,浙江杭州,310027 |
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| 基金项目： | 国家自然科学基金，浙江省自然科学基金，浙江大学海洋引导基金，the National Natural Science Foundation of China，Zhejiang Provincial Natural Science Founda-tion (LZ12B03000D |
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| 摘 要： | 采用浸渍法制备了不同粒径的活性炭负载的Pt催化剂,并运用扫描电镜、N2吸附-脱附、透射电镜和X射线衍射对催化剂进行了表征.结果表明,当活性炭载体的粒径从253.2?m下降至9.3?m时,其表面积或孔体积变化不大,Pt颗粒高度分散于载体表面,平均粒径为2.8～5.5nm.这些高度分散的Pt催化剂在非碱性条件下的甘油氧化反应中表现出较高的活性,且随着载体粒径的减小而明显提升.其中粒径为9.3?m的活性碳负载的Pt催化剂上,游离的甘油酸收率达到47.6%,且催化剂可以重复使用.
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| 关 键 词： | 甘油氧化 非碱性条件 载体尺寸 活性炭 铂 |
Oxidation of Biodiesel Glycerol over Pt Supported on Different Sized Carbon Supports in Base-Free Solution |
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| ZHANG Mengyuan , LIANG Dan , NIE Renfeng , LU Xiuyang , CHEN Ping , HOU Zhaoyin. Oxidation of Biodiesel Glycerol over Pt Supported on Different Sized Carbon Supports in Base-Free Solution[J]. Chinese Journal of Catalysis, 2012, 33(8): 1340-1346 |
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| Authors: | ZHANG Mengyuan LIANG Dan NIE Renfeng LU Xiuyang CHEN Ping HOU Zhaoyin |
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| Affiliation: | 1,* 1Institute of Catalysis,Department of Chemistry,Zhejiang University,Hangzhou 310028,Zhejiang,China 2Department of Chemical and Biological Engineering,Zhejiang University,Hangzhou 310027,Zhejiang,China |
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| Abstract: | Recent progress in the selective oxidation of biodiesel glycerol in aqueous solution by Au,Pt and alloy catalysts was reviewed.A series of Pt catalysts on different sized carbon supports were prepared and characterized by scanning electron microscopy,N2 adsorption,transmission electron microscopy,and X-ray powder diffraction.The average particle size of the carbon supports was decreased from 253.2 to 9.3 μm by ball milling,but their surface area and pore volume were only slightly changed.Pt was highly dispersed on these different sized carbon supports with an average particle size between 2.8-5.0 nm.Glycerol oxidation was catalyzed by these highly dispersed Pt catalysts in a base-free aqueous solution.The activity of the Pt catalysts increased with decreasing particle size of the carbon support,which was attributed to the higher accessibility of reactants to the Pt nanoparticles.The best yield of glyceric acid reached 46.7% and the catalyst was stable during six recycles. |
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| Keywords: | glycerol oxidation base-free solution support size carbon support platinum |
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