Selective oxidation of glycerol to dihydroxyacetone using CeO2-ZrO2-Bi2O3-SnO2-supported platinum catalysts
Selective oxidation of glycerol to dihydroxyacetone using CeO2-ZrO2-Bi2O3-SnO2-supported platinum catalysts
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DOI：
10.1080/21870764.2020.1753915
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发表时间：
2020-04
影响因子：
2.3
通讯作者：
Naoyoshi Nunotani;Masanari Takashima;P. Choi;Y. Choi;N. Imanaka
中科院分区：
文献类型：
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作者：
Naoyoshi Nunotani;Masanari Takashima;P. Choi;Y. Choi;N. Imanaka
采用Pt/CeO 2-ZrO 2-Bi 2 O3-SnO 2/SBA-16（SBA-16：圣巴巴拉Amorphous No. 16）催化剂，考察了Bi 3+的引入及氧的释放和储存能力对甘油选择氧化制二羟基丙酮（DHA）的影响。在CeO 2-ZrO 2催化剂中引入Bi 3+或Sn 4 +/2+离子，可提高催化剂的释氧和储氧能力，从而提高甘油转化率。Bi ~（3+）的引入对DHA产率的提高有一定的影响，Bi ~（3+）的引入可能通过几何效应加速了甘油中仲羟基的选择性氧化。Pt/Ce0.64Zr0.16Bi0.15Sn0.05O2−δ/SBA-16的活性最高，表现出高的氧释放和储存能力以及高数量的Bi 3+离子，在30 °C的中等温度下在大气中反应4 h后，DHA产率增加到53%，甘油转化率（74%）和DHA选择性（72%）。
ABSTRACT The effects of the Bi3+ introduction and the oxygen release and storage abilities on selective oxidation of glycerol into dihydroxyacetone (DHA) were demonstrated using Pt/CeO2-ZrO2-Bi2O3-SnO2/SBA-16 (SBA-16: Santa Barbara Amorphous No. 16) catalysts. By introducing Bi3+ or Sn4+/2+ ions into the CeO2-ZrO2 promoter, the oxygen release and storage abilities were enhanced, which led to increased glycerol conversion. The improvement in the DHA yield was affected by the introduction of Bi3+, which might accelerate selective oxidation of a secondary hydroxy group in glycerol caused by the geometric effect. The highest activity was obtained for Pt/Ce0.64Zr0.16Bi0.15Sn0.05O2−δ/SBA-16, which showed high oxygen release and storage abilities and a high number of Bi3+ ions, with the DHA yield increasing to 53% and high rates of glycerol conversion (74%) and DHA selectivity (72%) after reaction at a moderate temperature of 30 °C for 4 h in atmospheric air.