The Promotional Effect of Sulfates on TiO2 Supported Pt‐WOx Catalyst for Hydrogenolysis of Glycerol
The Promotional Effect of Sulfates on TiO2 Supported Pt‐WOx Catalyst for Hydrogenolysis of Glycerol
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DOI：
10.1002/cctc.202100863
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发表时间：
2021-08
期刊：
影响因子：
4.5
通讯作者：
Zhiming Zhou;Hongyan Jia;Yong Guo;Yangang Wang;Xiao-hui Liu;Qineng Xia;Xi Li;Yanqin Wang
中科院分区：
文献类型：
--
作者：
Zhiming Zhou;Hongyan Jia;Yong Guo;Yangang Wang;Xiao-hui Liu;Qineng Xia;Xi Li;Yanqin Wang
Pt - WOx基催化剂被广泛研究，在甘油氢解中具有很高的工业应用潜力。进一步提高Pt - WOx基催化剂的催化活性和稳定性具有重要意义。在此，我们用硫酸盐掺杂修饰了TiO2负载的Pt - WOx催化剂，并将其用于甘油氢解。硫酸盐的引入极大地提高了Pt/W/Ti催化剂在甘油氢解中的催化活性和稳定性。在120℃和4 MPa条件下，硫酸盐掺杂Pt/W - S/Ti的甘油转化率达到100%，对1,3 - PDO的选择性为36%，对n - PO的选择性为57%，而Pt/W/Ti的转化率仅为57%。此外，Pt/W−S/Ti的甘油转化率（90%）是Pt/W/Ti（4%）的22.5倍。Pt/W−S/Ti具有较高的活性，主要归因于Pt和WOx的分散性较好以及Brønsted酸量较多。Pt/W−S/Ti的稳定性增强是由于硫酸盐掺杂后Pt/W−S/Ti具有较强的抗浸出能力。
Pt‐WOx based catalysts were widely investigated and showed high industrial application potential for glycerol hydrogenolysis. Further improving the catalytic activity and stability of the Pt‐WOx based catalysts is important. Herein, we modified the TiO2 supported Pt‐WOx catalyst with sulfate doping and employed for the glycerol hydrogenolysis. The introduction of sulfates dramatically promoted the catalytic activity and stability of the Pt/W/Ti catalyst in glycerol hydrogenolysis. Sulfates‐doped Pt/W−S/Ti achieved 100 % conversion of glycerol, with 36 % selectivity to 1,3‐PDO and 57 % selectivity to n‐PO at 120 °C and 4 MPa, while the conversion over Pt/W/Ti only reached 57 %. Moreover, Pt/W−S/Ti offered 22.5 times more glycerol conversion (90 %) than Pt/W/Ti (4 %) for the second run. The much higher activity of the Pt/W−S/Ti was ascribed to the better dispersion of Pt and WOx species and more Brønsted acid amount. The enhanced stability of Pt/W−S/Ti was attributed to its strong anti‐leaching ability after sulfate doping.