传质助剂对柴油生物脱硫过程的影响

Effects of Transport Additives on Biodesulfurization of Diesel Oil

以从胜利油田被高含硫原油污染的土壤中筛选到的根癌土壤杆菌UP-3为研究对象,考察了模拟油体系中传质助剂对该菌株生物脱硫效果的影响,同时研究了在传质助剂存在条件下油水比、反应时间和硫含量对UP-3生物脱硫性能的影响。结果表明,该生物脱硫菌在脱除含硫化合物的同时不消耗其它烃类物质;传质助剂吐温80能够提高UP-3对模拟油中的脱硫率;吐温80存在时,UP-3在3d内可将模拟油(含硫量200mg/L)中98.01%的硫脱除;UP-3对柴油最高的脱硫率仅达到31.81%,需要进一步提高其对有机硫化物的脱硫活性。

Biodesulfurization of Agrobacterium tumefaciens UP-3, which was isolated from the soil contaminated by high sulfur oil, was investigated in model diesel oil. Effects of transport additives on biodesnlfurization of UP-3 were investigated. Other key factors, such as reaction time, ratio of oil to water and sulfur content, were also discussed under additives present. The results indicate that the bacterium can remove sulfur from model oil without decreasing other hydrocarbon content. Tween 80 can enhance the performance of biodesulfurization of the strain. When biodesulfurization conditions were selected as reaction time being 3 days, ratio of oil to water being 1：9, sulfur content being 200mg/L in model oil, the bacterium UP-3 could degrade 98.01% dibenzothiophene （DBT） of model oil with Tween 80 present. Since the bacterium can only remove 31.81% sulfur content in diesel oil, the performance of biodesulfurization needs to be further improved.