Study on the Preparation and Catalytic Activities of SO4 2− Promoted Metal Oxide Solid Superacid Catalysts for Model Oil Desulfurization

Effect and mechanism of ultrasound on acid loading in the preparation of silicon-based sulfonic solid acids

“…Yang et al [29] prepared the superstrong solid acid SO 4 2- /ZrO 2 by an ultrasound-assisted impregnation method and found that ultrasound can refine the ZrO 2 carrier particles in the carrier's precipitation preparation and strengthen the carrier's binding and sulfonic acid in the impregnation process, thereby improving the acid loading effect. Zhang et al [30] found that the SO 4 2- /ZrO 2 -TiO 2 solid superacid prepared by the ultrasonic coprecipitation method has a larger specific surface area, good thermal stability, and higher catalytic activity than that obtained by the mechanical agitation precipitation method. To our knowledge, ultrasound technology has never been reported for preparing micron sized sulfonic acid solid acids.…”