摘要
利用活性半焦对FCC柴油进行固定床吸附脱硫实验。按正交设计方法考察床层高径比、固定床温度、空速、催化剂种类和金属氧化物焙烧温度对脱硫率的影响。结果表明,各因素对脱硫率影响的大小顺序及最佳工艺条件为:空速(2 h-1)>床层高径比(7.5)>固定床温度(120℃)>催化剂种类(负载CuO)>焙烧温度(350℃)。考察了最佳工艺条件下活性半焦的脱硫性能,并对其600℃进行热再生三次。结果表明,最佳工艺条件下,脱硫剂脱硫率达55.95%,随脱硫时间的延长,脱硫剂新鲜样和再生样脱硫率均下降,随再生次数的增加,脱硫率降低,但降低缓慢。经新鲜样和再生样脱硫后,柴油产品收率均在81%以上,而油品总收率在93%以上。
Absorptive desulfurization of FCC diesel over activated semi-coke （AC）was studied in fixed bed reactor. The influence of different factors on the desulfurization efficiency was investigated by orthogonal test, including L/D of the bed, bed temperature, space velocity, catalyst and calcination temperature. The results showed that different factors affected the desulfurization efficiency in the following order： space velocity 〉 L/D of the bed 〉 bed temperature 〉 catalyst types 〉 calcination temperature. The opti- mum condition was obtained as follows ： LHSV 2 h ^- 1, L/D = 7.5, bed temperature 120℃, CuO/AC catalyst, calcination temperature 350 ℃. Desulfurization efficiency of 55.95% was attained over the activated semi-coke catalyst under the optimum condition. The spent semi-coke was regenerated for three cycles at 600 ℃. The desulfurization efficiency declined with time and slowly with regeneration cycles. Clean diesel yield of 81% and overall oil yield of over 93% were obtained.
出处
《工业催化》
CAS
2007年第1期24-28,共5页
Industrial Catalysis
关键词
柴油
半焦
吸附脱硫
diesel oil
semi - coke
absorptive desulfurization
