Promotion Effect of Al2O3 on Pt–WOx/SiO2 Catalysts for Selective Hydrogenolysis of Bioglycerol to 1,3-Propanediol in Liquid Phase
Promotion Effect of Al2O3 on Pt–WOx/SiO2 Catalysts for Selective Hydrogenolysis of Bioglycerol to 1,3-Propanediol in Liquid Phase
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DOI：
10.1007/s10562-020-03140-z
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发表时间：
2020-02
影响因子：
2.8
通讯作者：
Yuxin Liang;Guojun Shi;Kai Jin
中科院分区：
文献类型：
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作者：
Yuxin Liang;Guojun Shi;Kai Jin
摘要选择性氢解甘油制备1，3-丙二醇（1，3-PDO）被认为是生物质甘油价值提高和1，3-丙二醇需求增长的完美结合。采用Al（NO3）3·9 H2O浸渍SiO2凝胶，然后高温煅烧，SiO2和Al 2 O3之间的强烈相互作用使Al 2 O3均匀分散在SiO2基体表面。用Al 2 O3修饰的SiO2依次负载WOx和Pt，制得的Pt-WOx/SiO2-Al 2 O3催化剂的表面酸性显著增强，这是由于Al 2 O3修饰的载体与WOx结构域之间的强相互作用以及Al 2 O3引入的离子交换功能所致.通过改变Al 2 O3的含量，实现了催化剂的酸中心和金属中心的匹配，并使催化剂的甘油转化率和1，3-PDO选择性得到了大幅度的提高。图示摘要以Al 2 O3改性的SiO2为载体，制备的Pt-WOx催化剂在甘油氢解反应中的活性得到了显著提高。
AbstractSelective hydrogenolysis of bioglycerol to 1,3-propanedilo (1,3-PDO) is regarded as a perfect combination of a valorization of biomass-derived glycerol and an increasing demand for 1,3-propanediol. In this work, SiO2gel was impregnated by Al(NO3)3·9H2O followed by a calcination at a high temperature, and a strong interaction between SiO2and Al2O3led to a homogeneous dispersion of the Al2O3on the surface of the substrate SiO2. The Al2O3-decorated SiO2was used to load WOx and Pt sequentially and the resulting Pt–WOx/SiO2–Al2O3catalysts were found a markedly enhanced surface acidity due to a strong interaction between the Al2O3-modified support and the WOx domain as well as the introduced ion exchange functionality by Al2O3addition. A well-defined matching between the acidic and metallic sites was realized by turning the content of the Al2O3, and the glycerol conversion and 1,3-PDO selectivity were enhanced by a large margin on the optimized Pt–WOx/SiO2–Al2O3catalyst.Graphic AbstractA markedly improved reactivity in bioglycerol hydrogenolysis was realized using the Pt–WOx catalysts supported over Al2O3-modified SiO2.