Metal-organic framework (UIO-66-NH2)-encapsulated peroxophosphotungstate (PW4) loaded on graphene oxide (GO) as catalyst for desulfurization of fuel

A composite PIALgUIO-66-NH2/GO was designed and prepared via facile in-situ synthesis method for catalytic oxidation desulfurization of fuel. The proper sizes (window size and pore size) of UIO-66-NH2 can effective sealing PW4 as monomolecular active component and prevent PW4 leaching during the reaction process. At the same time, the introduction of GO can improve the electron transfer of the catalyst. Characterization tests showed that the active component PW4 was successfully encapsulated with a loading amount of 0.19 mmol/g. The desulfurization results indicated that the PW4@UIO-66-NH2/GO has excellent catalytic activity, which can remove 99.9% sulfides in model fuel, and the activity did not decrease obviously after repeated use for ten times. The good activity and reusability of PW4@UIO-66-NH2/GO attributes to the introduction of GO and UIO-66-NH2. In addition, based on GC-MS and EPR results, a possible mechanism of desulfurization reaction was proposed.

Automated summary

A composite catalyst was designed and prepared for catalytic oxidation desulfurization of fuel via a simple in-situ synthesis method. The catalyst exhibited excellent catalytic activity and reusability, which was attributed to the introduction of GO and UIO-66-NH2. A possible mechanism of desulfurization reaction was proposed based on GC-MS and EPR results.