Selective oxidation of glycerol to dihydroxyacetone using CeO2-ZrO2-Bi2O3-SnO2-supported platinum catalysts

• Published in: Journal of Asian Ceramic Societies Vol. 8; no. 2; pp. 470 - 475
• Main Authors: Nunotani, Naoyoshi, Takashima, Masanari, Choi, Pil-Gyu, Choi, Yeon-Bin, Imanaka, Nobuhito
• Format: Journal Article
• Language: English
• Published: Taylor & Francis 02.04.2020; Taylor & Francis Group
• Subjects: dihydroxyacetone; glycerol; Selective oxidation
• ISSN: 2187-0764
• DOI: 10.1080/21870764.2020.1753915

The effects of the Bi 3+ introduction and the oxygen release and storage abilities on selective oxidation of glycerol into dihydroxyacetone (DHA) were demonstrated using Pt/CeO 2 -ZrO 2 -Bi 2 O 3 -SnO 2 /SBA-16 (SBA-16: Santa Barbara Amorphous No. 16) catalysts. By introducing Bi 3+ or Sn 4+/2+ ions into the CeO 2 -ZrO 2 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 Bi 3+ , which might accelerate selective oxidation of a secondary hydroxy group in glycerol caused by the geometric effect. The highest activity was obtained for Pt/Ce 0.64 Zr 0.16 Bi 0.15 Sn 0.05 O 2−δ /SBA-16, which showed high oxygen release and storage abilities and a high number of Bi 3+ 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.