Self-assembly of poly ionic liquid−polyoxometalate on the surface of
graphene oxide applied for deep desulfurization
A series of polymer ionic liquid (PIL)-based polyoxometalate (POM) salt
is and synthesized through self-assembly method. Whereafter, supported
catalysts are prepared by adding graphene oxide during the self-assembly
process. The presence of polymer ionic liquid of hybrid not only can
increase the lipophilicity via abundant carbon chains, but also
immobilized the hybrid on the surface of GO through specific π-π
complexation, improving the stability during desulfurization process.
Two group materials are characterized and used as catalysts for the
removal sulfides in oil. By contrast, the supported catalyst has better
performance. Then, the response surface methodology is used to analyze
the influence of reaction conditions on removal thiophene and explore
the optimum conditions. And the maximum sulfur removal efficiency of T,
BT and DBT can achieve to 98.47, 99.98 and 99.28 %, respectively.
Besides, the catalyst can be easily recovered and reused without
significant decrease in activity after ten cycles.