Dehydration of fructose into 5-hydroxymethylfurfural by high stable ordered mesoporous zirconium phosphate
Dehydration of fructose into 5-hydroxymethylfurfural by high stable ordered mesoporous zirconium phosphate
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高稳定有序介孔磷酸锆将果糖脱水生成5-羟甲基糠醛
DOI：
10.1016/j.fuel.2014.12.072
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发表时间：
2015-04
期刊：
影响因子：
7.4
通讯作者：
Chou, Lingjun
中科院分区：
文献类型：
--
作者：
Zhao, Jun;Song, Huanling;Liang, Ning;Chou, Lingjun
采用一锅蒸发诱导自组装法（EISA）制备了一系列不同P/Zr摩尔比的有序介孔磷酸锆（M-ZrPO-x）。研究了M-ZrO-x对果糖脱水制备5-羟甲基糠醛（5-HMF）的催化性能。通过NH3-TPD和吡啶-IR测定，M-ZrPO-0.75具有高浓度的Brönsted和刘易斯酸中心，在相对温和的条件下对5-HMF具有较高的催化活性（97.4%）和选择性（79.6%）。此外，M-ZrPO-0.75表现出优异的催化稳定性。通过XRD、SEM、TEM、BET、XRF等分析手段，研究了反应后M-ZrPO-0.75的结构、表面和织构性质。结果表明，即使在12次循环后，介孔结构仍然保留，这可能归因于“有序”的介孔性质和高的热稳定性。此外，以二甲基亚砜为溶剂的M-ZrPO催化体系具有较低的反应活化能。
In this paper, a series of ordered mesoporous zirconium oxophosphate with different P/Zr molar ratios (M-ZrPO-x) were prepared via one-pot evaporation induced self-assembly strategy (EISA). The catalytic performance of M-ZrPO-xfor the dehydration reaction of fructose to produce 5-hydroxymethylfurfural (5-HMF) was also studied. With high concentration of Brönsted and Lewis acid sites measured through NH3-TPD and pyridine-IR, M-ZrPO-0.75 performed high catalytic activity (up to 97.4%) and selectivity (79.6%) of 5-HMF under relatively mild conditions. Furthermore, M-ZrPO-0.75 performed excellent catalytic stability. Based on detailed analyses of XRD, SEM, TEM, BET and XRF, the structural, surface and textural properties of M-ZrPO-0.75 after reaction were investigated. Obtained results demonstrated that the mesostructure still retained even after twelve cycles, which may be ascribed to the “ordered” mesoporous properties and high thermal stability. In addition, a lower activation energy was obtained in this M-ZrPO catalytic system using dimethyl sulfoxide as solvent.
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