Remarkable Catalytic Performance of Supported P-Mo-W Polyoxometalate by Green-Friendly Fiber for Ultra-Deep Oxidative Desulfurization

The global demand for sustainable and cleaner energy sources has driven more research on advanced desulfurization technologies from fossil fuels, in which oxidative deep desulfurization has become a hotspot. In this paper, the nucleation-controlled method was used to realize the uniform growth of porous amino metal–organic framework (MOF) on green-friendly cotton fibers (CF), and the pore structure and amino functional groups on MOF were beneficial to firmly anchor of P-Mo-W polyoxometalate (POM) active species. Thus, a kind of new supported P-Mo-W POM composite catalyst (POM@MIL-101@CF) has been obtained and exhibited excellent oxidative desulfurization performance for fuels. Under the optimal reaction conditions: T = 60°C, O/S = 7, two pieces of catalyst, the ODS efficiency of 0.5-POM@MIL-101@CF for DBT could reach 99.57%, with slight changes after more than 5 reuse times. Meanwhile, EPR experiments proved that ·O₂⁻ and ·OH radicals were both the main reactive substances, which promoted the remarkable catalytic desulfurization performance of POM@MIL-101@CF. Therefore, this kind of supported POM catalyst is simple to prepare and green-friendly in raw materials, as well as the strong binding between POM and CF with the bridging effects of MIL-101 makes it better adapt to the needs of actual industrial production and has a broad application prospect in practical desulfurization applications.