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由于柴油加氢脱硫技术投资大、操作条件苛刻及污染严重等问题,氧化脱硫技术已成为研究热点。针对柴油H2O2氧化脱硫技术存在氧化剂价格高、柴油收率低和有含硫污水排放等技术经济问题,采用专用的柴油均相催化氧化脱硫催化剂TS-1和纯O2氧化剂,在高压反应釜中对直馏柴油进行催化氧化脱硫,可达到很好的脱硫效果且耗氧量少。实验结果表明,在150℃、0.8 MPa、反应时间60 min和m(催化剂)∶m(柴油)=1 500μg.g-1的条件下,可将柴油硫含量从2 217.2μg.g-1降到265μg.g-1,脱硫柴油硫含量符合欧洲Ⅱ类柴油标准(≤300μg.g-1),柴油收率达到95.2%。
Due to the large investment in diesel hydrodesulfurization technology, harsh operating conditions and serious pollution problems, oxidative desulfurization technology has become a research hotspot. In order to solve the technical and economic problems of diesel H2O2 oxidation desulfurization technology, such as high price of oxidant, low yield of diesel oil and emission of sulfur-containing sewage, special diesel homogeneous catalytic oxidative desulfurization catalyst TS-1 and pure O2 oxidant are used in high pressure autoclave Straight-run diesel for catalytic oxidation desulfurization, can achieve good desulfurization effect and less oxygen consumption. The experimental results show that under the condition of 150 ℃, 0.8 MPa, reaction time 60 min and m (catalyst): m (diesel) = 1 500μg.g-1, the sulfur content of diesel can be reduced from 2 217.2μg.g-1 To 265μg.g-1. The sulfur content of desulfurized diesel oil complies with the European Class II diesel standard (≤300μg.g-1) and the diesel yield reaches 95.2%.