Abstract

Catalysts of the second stage of hydrocracking are tested under different conditions, reducing the time required to reach the level of steady-state activity. Tests are performed on a laboratory testbench under conditions (temperature, pressure, and liquid hourly space velocity (LHSV)) close to industrial and typical of the second stage of hydrocracking. Introducing an additional preliminary stage at the start of tests at elevated temperatures and LHSVs while using a dimethyl disulfide solution in decane as a sulfiding mixture are shown to substantially reduce the time of experiment. Conditions of the preliminary stage that preserve the catalyst’s selectivity to diesel are selected.

中文翻译：

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加氢裂化第二阶段催化剂测试条件对达到稳态活性时间的影响

摘要

加氢裂化第二阶段的催化剂在不同条件下进行测试，减少了达到稳态活性水平所需的时间。测试在实验室测试台上进行，条件（温度、压力和液时空速 (LHSV)）接近工业条件和加氢裂化第二阶段的典型条件。在高温和 LHSV 测试开始时引入额外的预备阶段，同时使用癸烷中的二甲基二硫溶液作为硫化混合物，可以大大缩短实验时间。选择保持催化剂对柴油选择性的初级条件。