The effect of catalyst activity on a 900 000 ton y^–1 gasoline–diesel hydrotreating unit is analyzed on the basis of the integration of hydrotreating reactor and the heat exchanger network (HEN). The reactor’s inlet/outlet temperatures versus catalyst activity relation is identified on the basis of simulation and coupled with the composite curve. On the basis of this, a graphical method is proposed to integrate the hydrotreating reactor and the HEN, and analyze the effect of catalyst deactivation on the energy consumption of HEN. Three matching schemes are proposed for the HEN, and the variations of the heat exchange area along the catalyst deactivation are analyzed. The optimal matching scheme is identified with both operating cost and capital cost considered. For the studied gasoline–diesel hydrotreating unit, catalyst deactivation has a significant influence on the energy consumption, and the minimum heating utility consumption decreases from 2680 kW to 0 as the catalyst activity decreases from 0.9 to 0.44. The study shows that the heat exchange area of a heat exchanger changes significantly along catalyst activity, and its maximum area might appear at neither the highest nor the lowest catalyst activity. The proposed integration method can be applied to analyze the effect of catalyst deactivation efficiently.

中文翻译：

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催化剂失活对汽油-柴油加氢处理过程能耗的影响

催化剂活性对90万吨y ^{–1的影响}在加氢处理反应器和热交换器网络（HEN）集成的基础上，对汽油-柴油加氢处理装置进行了分析。反应器的入口/出口温度与催化剂活性之间的关系在模拟的基础上确定，并与复合曲线相结合。在此基础上，提出了一种图形化的方法将加氢处理反应器和HEN进行集成，并分析了催化剂失活对HEN能耗的影响。针对HEN提出了三种匹配方案，分析了换热面积随催化剂失活的变化。确定最佳匹配方案时要同时考虑运营成本和资本成本。对于所研究的汽油-柴油加氢处理装置，催化剂的失活对能量消耗有重大影响，当催化剂活性从0.9降低到0.44时，最小加热效用消耗从2680 kW降低到0。研究表明，换热器的换热面积随催化剂活性的变化而显着变化，并且其最大面积可能不会出现在最高或最低的催化剂活性上。所提出的积分方法可以有效地分析催化剂失活的效果。