Ultra Clean Fuel via Modified Ultrasound-Assisted Oxidative Desulfurization Process at Room Temperat

Shun Sheng Cheng, Ph.D
Golden Eagle Oil Refinery
North Salt Lake City, UT Abstract: Limitation of 15 ppm has been considered for the content of sulfur in diesel fuel due to the sulfur regulation by the EPA. However, ultra low sulfur diesel (ULSD) fuel has not been produced sufficiently by the current desulfurization technology. Various levels of sulfur content can be observed in different diesel fuels, for instance, Valley Oil (8000 ppm), F-76 (4200 ppm) and treated Valley Oil (500 ppm). In this regard, 99.9% removal efficiency in sulfur reduction can be demonstrated by solvent extraction, as well as solid adsorption, which is after the modified ultrasound assisted desulfurization process. Moreover, recycling of ionic liquid and acid catalyst which is usually contained in the spent aqueous phase can be achieved. Interestingly, high efficiency, as well as high selectivity can be exhibited. In the pilot study, unit containing treatment tank, pipeline system, as well as high shear mixer has been created for the development of practical application of a batch-type continuous flow system. In the development, appropriate time and mild condition were given during operations. The results show 99.9% desulfurization efficiency can be achieved by the process. Moreover, utilization of ionic liquid and acid catalyst had been done at a less extent by the pilot study, as compared to the batch study.

Location: Kaprielian Hall (KAP) - 209

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