Solvent-Free Production of Glycerol Carbonate from Bioglycerol with Urea Over Nanostructured Promoted SnO2 Catalysts
作者:Baithy Mallesham、Agolu Rangaswamy、Bolla Govinda Rao、Tumula Venkateshwar Rao、Benjaram M. Reddy
DOI:10.1007/s10562-020-03241-9
日期:2020.12
In this study nanostructured MoO3 and WO3 promoted SnO2 solid acid catalysts were explored for the production of glycerol carbonate via carbonylation of bioglycerol with urea. The investigated reference SnO2 and promoted catalysts were synthesized by fusion and wet-impregnation methods, respectively. The physicochemical properties of the prepared catalysts were thoroughly analyzed by XRD, Raman, BET
在这项研究中,纳米结构的 MoO3 和 WO3 促进的 SnO2 固体酸催化剂被探索用于通过生物甘油与尿素的羰基化生产碳酸甘油。所研究的参比 SnO2 和促进催化剂分别通过熔融和湿浸渍法合成。通过XRD、Raman、BET表面积、TEM、FTIR、吡啶吸附FTIR、NH3-TPD和XPS技术对制备的催化剂的理化性质进行了全面分析。从表征研究中发现,SnO2 与 MoO3 和 WO3 促进剂的结合导致显着的结构、质地和酸性特性。特别是,在 MoO3/SnO2 催化剂(~81.45 μmol g-1)上观察到大量酸性位点,其次是 WO3/SnO2(61.81 μmol g-1)和纯 SnO2(46.47 μmol g-1),在生物甘油与尿素的羰基化反应中起关键作用。添加MoO3和WO3促进剂后,SnO2的BET比表面积和氧空位显着提高。TEM 图像显示合成催化剂形成了直径约为 5-25 nm