| 黎演明.负载型磷钨酸催化剂的制备及其催化果糖分解制备5-羟甲基糠醛的研究[J].分子催化,2011,(6):503-507 |
| 负载型磷钨酸催化剂的制备及其催化果糖分解制备5-羟甲基糠醛的研究 |
| Preparation Of Supported Phosphotungstic Acid Catalysts And Their Activity In Fructose Dehydration To 5-hydroxymethylfurfural |
| 投稿时间：2011-12-05 修订日期：2011-12-19 |
| DOI： |
| 中文关键词: 果糖, 5-羟甲基糠醛, 负载, 磷钨酸, 多相催化剂 |
| 英文关键词:Fructose, 5-Hydroxymethylfurfural, Phosphotungstic Acid, Supported, Heterogeneous catalysis |
| 基金项目:广西自然科学基金 |
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| 摘要点击次数: 1868 |
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| 中文摘要: |
| 以MCM-41、HZSM-5以及丝光沸石（MOR）为载体，磷钨酸（PW）为活性组分，通过浸渍法制备一系列负载型磷钨酸催化剂；采用FTIR、XRD、N2-吸附-脱附和NH3程序升温脱附等分析手段对催化剂进行表征。结果表明在负载活性物质过程中，载体骨架未被破坏，PW以无定形结构均匀分散到载体的表面并与载体间存在着明显的键合作用。通过果糖分解制备5-羟甲基糠醛（5-HMF）的反应对催化剂的催化性能进行了评估，结果表明相对于其它催化剂，HZSM-5负载磷钨酸催化剂(PW/HZSM-5)凭借其具有更高的表面酸量以及合适孔径而表现出更好的催化活性和更高选择性的生成5-HMF；以二甲基亚砜为溶剂，PW/HZSM-5为催化剂，在120℃条件下反应80min，果糖的转化率高达到96.5%，生成5-HMF的选择性为79.9%。 |
| 英文摘要: |
| Using MCM-41、HZSM-5 and mordenite(MOR) as carriers，phosphotungstic acid as active components, a set of molecular sieve supported phosphotungstic acid catalysts were prepared by a wet impregnation method；The supported phosphotungstic acid catalysts was characterized by Fourier-transform infrared spectroscopy、X-ray diffraction、low temperature nitrogen adsorption-desorption technique and NH3-Temperature Programmed Desorption respectively. The results indicated that the frameworks of the carriers were not destroyed during loading, PW was highly dispersed on the surface of the carriers with amorphous structure, strong interaction was occurred between PW and the carriers. The supported phosphotungstic acid catalysts were evaluated as catalysts for the dehydration of fructose to 5-hydroxymethylfurfural (5-HMF), due to its more acid amount and appropriate pore size,the catalyst of PW/HZSM-5 shows superior catalyst activity and selectivity to 5-HMF comparing to the others supported phosphotungstic acid catalysts. With PW/HZSM-5 catalyst, fructose conversion of 96.5% with Selectivity to 5-HMF of 79.9% were attained at 120℃ for 80 min reaction time in dimethylsulfoxide. |
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