A Size-Matched Composite (CTA)3PW4@UiO-67 for the Ultra-Deep Desulfurization of Simulated Diesel: Design, Performance, and Reusability

Venturello-structured polyoxometalates (POMs) are effective homogeneous catalysts and confining POMs to size-matched metal-organic frameworks (MOFs) as heterogeneous catalyst is an effective way to improve their practical application. The appropriate pore and narrow window of pristine UiO-67 can not only enclose POMs in single molecule but also limit their leaching and can provide a suitable platform for the oxidation of most sulfur-containing organic compound. The composite (CTA) 3 PW 4 @UiO-67 was prepared by a facile in situ synthesis method, characterized by a variety of means and tested for desulfurization of multicomponent simulated diesel. The results prove that the active component (CTA) 3 PW 4 is effectively encapsulated, and the composite (CTA) 3 PW 4 @UiO-67 show remarkable desulfurization activity and excellent reusability. In addition, the kinetics and possible mechanism of the reaction were investigated. This work opens up a new idea for the design of “host-guest adapted” catalyst suitable for fuel desulfurization technology.