关键词: 二甲苯异构化, 催化剂, 异构化活性, 乙苯转化, 收率, 转化型工艺, 脱烷基型工艺

Abstract: Using iterative analysis algorithm, the influence on the operation of aromatics complex by catalyst performance under different process operating conditions is compared and analyzed. By adjusting the operation of the xylene isomerization reactor to control the catalyst performance, and the degree of influence of performance indicators such as isomerization activity (PX/X), ethylbenzene conversion (EBC) and yield on the circuit of the complex unit was independently investigated. The calculation results show that the composition and structure of the fresh feed have the greatest impact on the operating parameters such as the yield and load of the unit. The feedstockfrom disproportionationunitis generally better than that from the reformingunit. The EB conversion technologyis highlyadaptable to different feedstock. The EB dealkylation technology should be the first choice for disproportionation stream. The EB dealkylation process loop is more stable, and the three performances of the catalyst have a relatively small impact on the loop iteration results. In the investigated range, the loop fluctuation range is less than 3%. The EB conversion technology is liable to beaffected by the EBC activity of the catalyst, which has an impact of about 8% on various parameters of the unit, while the impact range of the PX/X is only 3%.

Key words: xylene isomerization, catalyst, isomerization activity, ethylbenzene conversion, yield, conversion technology, dealkylation technology