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采用气相色谱 原子发射光谱 (GC AED)联用技术对柴油中硫化物进行了定性定量研究 ,考察了柴油加氢脱硫处理前后硫化物的变化及不同柴油原料硫化物的分布情况。结果表明 ,1#柴油可定性出 33类硫化物 ,经加氢脱硫处理后 ,1 1#和 1 2 #样品硫含量可由 1497mg/L分别降到 16 5 1mg/L和 90 4mg/L ,平均脱除率为 89 0 %和94 0 %。其中噻吩或苯并噻吩的脱除率为 10 0 %;C1二苯并噻吩的脱除率为 90 0 %和 96 2 %;C2 二苯并噻吩的脱除率为 80 6 %和 91 7%;C3 二苯并噻吩的脱除率为 72 6 %和 84 4 %;C4 二苯并噻吩的脱除率为 79 0 %和 90 3%;C5或C6二苯并噻吩的脱除率为 5 8 4 %和 6 8 4 %;未知硫化物脱除率 95 7%和 97 9%。噻吩类脱除率视取代基的大小、个数和取代位置的不同脱除率不同 ;不同原料总硫和各种硫化物含量差别很大 ,应根据其硫化物的分布特点 ,有针对性地研制开发加氢脱硫的催化剂及选择合适的加工工艺。
The gas chromatography-atomic emission spectrometry (GC-AED) was used to qualitatively and quantitatively study sulfides in diesel oil. The changes of sulfides in diesel oil before and after diesel hydrodesulfurization and the distribution of sulfides in different diesel oils were investigated. The results showed that 33 sulfur compounds could be characterized in 1 # diesel oil. After hydrodesulfurization, the sulfur contents of 11 # and 12 # samples could be reduced from 1497 mg / L to 16 5 1 mg / L and 90 4 mg / L, respectively. The average The removal rates were 89 0% and 94 0%. Among them, the removal rate of thiophene or benzothiophene was 100%; the removal rates of C1 dibenzothiophene were 90 0% and 96 2%; the removal rates of C2 dibenzothiophene were 80 6% and 91 7% ; C3 dibenzothiophene removal rate of 72 6% and 84 4%; C4 dibenzothiophene removal rate of 79 0% and 90 3%; C5 or C6 dibenzothiophene removal rate of 5 8 4% and 684%; unknown sulfide removal 95 7% and 97 9%. Thiophene removal rate depending on the size of the substituent, the number of substitution sites and different removal rates; different raw materials, total sulfur and various sulfide content vary greatly, according to the distribution of its sulfide, targeted Research and development of hydrodesulfurization catalyst and select the appropriate processing technology.