Investigation on Desulfurization Performance of Cu-Mofs Catalyst Promoted by Phosphotungstic Acid

Abstract

Using Cu-MOFs as the carrier and phosphotungstic acid (HPW) as the active center, the HPW@Cu-MOF catalysts were prepared through hydrothermal synthesis. Mechanism and desulfurization performance of HPW@Cu-MOF catalysts were investigated. The results shown that Cu-MOFs have a large number of channels that can accommodate and limit HPW, which can effectively increase the load of HPW. HPW@Cu-MOF performs best at a reaction temperature of 200℃ and has an almost 100% oxidation efficiency. Adding HPW to Cu-MOFs enhances its specific surface area and pore volume, offering more acidic sites for SO2, improving catalytic oxidation rate, according to various structure characterizations (XRD, SEM, XPS, BET, etc.). Additionally, the desulfurization catalyst still shows better stability after 5 recycles, and the oxidation product has a high added value product.

Keywords: Cu-MOFs, hydrothermal synthesis, desulfurization catalyst, phosphotungstic acid