关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">焦化汽油加氢装置, 预保护反应器, 精制油终馏点, 烃类组成, 蒸馏残余物, 硫化物类型, 噻吩硫, C9甲基苯并噻吩

Abstract: In response to the significant increase in the final boiling point of refined oil in the pre-protection reactor during the initial operation of a coking gasoline hydrogenation unit, a comparative analysis was conducted on the hydrogenation catalysts used in two cycles, and pilot tests were carried out. By analyzing the properties of oil products, hydrocarbon composition, and changes in sulfur compound structures, the reasons for the increase in the final boiling point of refined oil have been preliminarily understood. The results of the pilot test indicate that the increase in the final boiling point of refined oil in the pre-protection reactor can reach up to 22℃, which is a normal phenomenon. Compared to the feedstock, the content of monocyclic aromatic hydrocarbons and polycyclic aromatic hydrocarbons in the distillation residue of refined oil increased by more than 2.0 percentage points, and the content of benzothiophene in refined oil increased by more than twice. The generation of polycyclic aromatic hydrocarbons and large molecular sulfur-containing compounds are both reasons for the increase in the final boiling point of refined oil. Lower processing loads are more likely to lead to the formation of high boiling point heavy components. Therefore, the processing load of the pre-protection reactor in the coking gasoline hydrogenation unit should not be too low.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">coking gasoline hydrogenation unit, pre-protection reactor, final boiling point of refined oil, hydrocarbon composition, distillation residue, sulfur compound type, thiophene sulfur, C9 methylbenzothiophene