Structure–Activity Relationships of WOx-Promoted TiO2–ZrO2 Solid Acid Catalyst for Acetalization and Ketalization of Glycerol towards Biofuel Additives
作者:Mallesham Baithy、Deboshree Mukherjee、Agolu Rangaswamy、Benjaram M. Reddy
DOI:10.1007/s10562-021-03733-2
日期:2022.5
TiO2–ZrO2 solid acid catalyst was prepared and applied in the catalytic acetalization and ketalization of glycerol with carbonyl compounds to produce biofuel additives. The presence of WOx promoter and TiO2 remarkably improved the catalytic activity of ZrO2. Approximately, 100% glycerol conversion was evidenced with non-bulky aliphatic aldehydes and ketones like, propanol and cyclohexanone. The physical
摘要 制备了WO x促进的TiO 2 -ZrO 2固体酸催化剂,并将其应用于甘油与羰基化合物的催化缩醛化和缩酮化生产生物燃料添加剂。WO x助剂和TiO 2的存在显着提高了ZrO 2的催化活性。大约 100% 的甘油转化被非大体积脂肪醛和酮(如丙醇和环己酮)证明。WO x促进的TiO 2 -ZrO 2的物理表征揭示了 ZrO 2的四方晶相的较高形成,超过单斜。总表面酸度和布朗斯台德与路易斯酸性位点浓度之比分别通过 NH 3 -TPD 和吡啶化学吸附 FTIR 光谱测定。在 WO x促进的TiO 2 -ZrO 2催化剂表面上证明了明显更高浓度的路易斯酸性位点,约 213.29 μmol/gm 。催化活性研究揭示了表面路易斯酸性位点浓度与催化剂活性之间的直接相关性。这一重要观察表明路易斯酸性位点在该催化过程中的关键作用。WO x促进的TiO 2 –ZrO 2催化剂也相当稳定,在甘油与其他取代羰