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Selective hydrogenolysis of glycerol to 1,3-propanediol over Pt-WOx/SAPO-34 catalysts
Molecular Catalysis ( IF 4.6 ) Pub Date : 2018-06-30 , DOI: 10.1016/j.mcat.2018.06.018
Guojun Shi , Jinyang Xu , Zhigang Song , Zhen Cao , Kai Jin , Sihao Xu , Xiaotian Yan

Selective catalytic hydrogenolysis of glycerol to 1,3-PDO is cost-effective for both production of the 1,3-PDO with an increasing industrial demand and valorization of the glycerol derived from biodiesel production, and both acid and metal are thought necessary for the catalysts for the reaction that proceeds by a dehydration-hydrogenation mode. Acidic mesoporous SAPO-34 was synthesized by a hydrothermal method and used to load Pt and WOx. The prepared Pt/SAPO-34 catalyst was active for glycerol hydrogenolysis due to its surface acidity and textural properties except for a low selectivity to 1,3-PDO. The WOx introduced on Pt/SAPO-34 markedly promoted glycerol conversion and the selectivity to 1,3-PDO. The content of WOx was found vital for the reaction, and the optimized catalytic performances were realized on the Pt-WOx/SAPO-34 catalyst with 20% WOx. The optimized content of WOx in the Pt-WOx/SAPO-34 catalyst was confirmed as non-stoichiometric and highly dispersed polymerized tungsten oxide species, and strongly interacted with the metallic platinum loaded. Accordingly, the metallic platinum was well dispersed on the WOx/SAPO-34. Moreover, the decoration of WOx enhanced the strength of surface acidity of the Pt/SAPO-34 catalysts in term of weak and moderate acid. Moreover, long reaction time, low reaction temperature and high reaction pressure facilitated the selective production of the desired 1,3-PDO from glycerol.



中文翻译:

在Pt-WOx / SAPO-34催化剂上甘油选择性氢解为1,3-丙二醇

甘油选择性催化氢解为1,3-PDO对​​于工业需求增加的1,3-PDO生产和生物柴油生产甘油的增值均具有成本效益,并且酸和金属均被认为是必需的。通过脱水-氢化模式进行的反应的催化剂。通过水热法合成酸性介孔SAPO-34,并用于负载Pt和WOx。所制备的Pt / SAPO-34催化剂对甘油的氢解具有活性,这是由于其表面酸度和质构性质,但对1,3-PDO的选择性低。在Pt / SAPO-34上引入的WOx显着促进了甘油的转化和对1,3-PDO的选择性。发现WOx的含量对反应至关重要,在含20%WOx的Pt-WOx / SAPO-34催化剂上实现了最佳的催化性能。Pt-WOx / SAPO-34催化剂中WOx的最佳含量被确认为非化学计量和高度分散的聚合氧化钨,并与负载的金属铂强烈相互作用。因此,金属铂很好地分散在WOx / SAPO-34上。此外,就弱酸和中等酸而言,WOx的装饰增强了Pt / SAPO-34催化剂的表面酸度强度。而且,长的反应时间,低的反应温度和高的反应压力促进了由甘油的选择性生产所需的1,3-PDO。并与负载的金属铂强烈相互作用。因此,金属铂很好地分散在WOx / SAPO-34上。此外,就弱酸和中等酸而言,WOx的装饰增强了Pt / SAPO-34催化剂的表面酸度强度。而且,长的反应时间,低的反应温度和高的反应压力促进了由甘油的选择性生产所需的1,3-PDO。并与负载的金属铂强烈相互作用。因此,金属铂很好地分散在WOx / SAPO-34上。此外,就弱酸和中等酸而言,WOx的装饰增强了Pt / SAPO-34催化剂的表面酸度强度。而且,长的反应时间,低的反应温度和高的反应压力促进了由甘油的选择性生产所需的1,3-PDO。

更新日期:2018-06-30
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