Objective The aim is to increase the aromatics content in the No.3 jet fuel produced by the diesel and wax oil mixed feed hydrocracking unit,so that it can meet the requirements of military No.3 jet fuel products.Methods The content of aromatics in No.3 jet fuel was increased by adjusting the following parameters:increasing the proportion of wax oil in the mixed raw material,increasing the oil density of the mixed raw material,reducing the temperature of the refining reactor bed,optimizing the temperature of the graded catalyst bed of the cracking reactor,and reducing the saturation depth of aromatics hydrogenation.Results Firstly,the aromatics content in jet fuel could be significantly increased by increasing the proportion of wax oil and the density of mixed raw material oil under constant treatment capacity.Secondly,under the condition of high diesel ratio raw material,by significantly reducing the temperature of the refining reactor bed,simultaneously reducing the bed temperature of the light oil catalyst,improving the bed temperature of the flexible and medium oil catalyst,the saturation depth of aromatics hydrogenation was reduced,the aromatics volume fraction in jet fuel products was greater than or equal to 8％,while ensuring the BMCI value of the tail oil was less than 13.Conclusions By increasing the wax oil proportion and mixed raw materials density to a specific value and reducing the bed temperature of the refined reactor and the saturation depth of aromatics hydrogenation,the target of aromatics volume fraction in jet fuel products greater than or equal to 8％can be achieved,which solves the problem of producing military No.3 jet fuel by diesel and wax oil mixed feed hydrocracking unit and has certain production guiding significance.
diesel and wax oil mixed feedhydrocrackingaromaticsmilitary No.3 jet fuel
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