Lim Xian Bin, Ong Wee-Jun
School of Energy and Chemical Engineering, Xiamen University Malaysia, Selangor Darul Ehsan 43900, Malaysia.
Nanoscale Horiz. 2021 Jul 26;6(8):588-633. doi: 10.1039/d1nh00127b.
The ceaseless increase of pollution cases due to the tremendous consumption of fossil fuels has steered the world towards an environmental crisis and necessitated urgency to curtail noxious sulfur oxide emissions. Since the world is moving toward green chemistry, a fuel desulfurization process driven by clean technology is of paramount significance in the field of environmental remediation. Among the novel desulfurization techniques, the oxidative desulfurization (ODS) process has been intensively studied and is highlighted as the rising star to effectuate sulfur-free fuels due to its mild reaction conditions and remarkable desulfurization performances in the past decade. This critical review emphasizes the latest advances in thermal catalytic ODS and photocatalytic ODS related to the design and synthesis routes of myriad materials. This encompasses the engineering of metal oxides, ionic liquids, deep eutectic solvents, polyoxometalates, metal-organic frameworks, metal-free materials and their hybrids in the customization of advantageous properties in terms of morphology, topography, composition and electronic states. The essential connection between catalyst characteristics and performances in ODS will be critically discussed along with corresponding reaction mechanisms to provide thorough insight for shaping future research directions. The impacts of oxidant type, solvent type, temperature and other pivotal factors on the effectiveness of ODS are outlined. Finally, a summary of confronted challenges and future outlooks in the journey to ODS application is presented.
由于化石燃料的大量消耗导致污染案例不断增加，这使世界走向环境危机，并迫切需要减少有害的硫氧化物排放。随着世界向绿色化学迈进，由清洁技术驱动的燃料脱硫工艺在环境修复领域具有至关重要的意义。在新型脱硫技术中，氧化脱硫（ODS）工艺在过去十年中因其温和的反应条件和卓越的脱硫性能而受到广泛研究，并被誉为实现无硫燃料的后起之秀。这篇批判性综述强调了热催化ODS和光催化ODS在众多材料设计与合成路线方面的最新进展。这包括金属氧化物、离子液体、低共熔溶剂、多金属氧酸盐、金属有机框架、无金属材料及其杂化物的工程设计，以在形态、形貌、组成和电子态方面定制有利特性。将批判性地讨论ODS中催化剂特性与性能之间的本质联系以及相应的反应机理，以便为塑造未来研究方向提供全面的见解。概述了氧化剂类型、溶剂类型、温度和其他关键因素对ODS有效性的影响。最后，总结了ODS应用过程中面临的挑战和未来展望。
