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Multi-objective Operational Optimization of a Hydrotreating Process Based on Hydrogenation Reaction Kinetics
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-11-06 , DOI: 10.1021/acs.iecr.8b03379 Le Wu 1, 2 , Yuqi Wang 1, 2 , Lan Zheng 1, 2 , Xiaolong Han 1, 2 , Furong Hong 3
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-11-06 , DOI: 10.1021/acs.iecr.8b03379 Le Wu 1, 2 , Yuqi Wang 1, 2 , Lan Zheng 1, 2 , Xiaolong Han 1, 2 , Furong Hong 3
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Utility consumptions in hydrotreating (HDT) units are rapidly increasing because more heavy and sour crude oil are being processed to satisfy the increasing market demand of clean fuels, which then cause the direct and indirect emissions of CO2 and SO2. The environmental impacts of utilities should be considered when optimizing an HDT unit. A multi-objective optimization is proposed to reduce the operating cost and environmental impacts of utilities and products based on hydrogenation reaction kinetics. A cracked diesel HDT unit is adopted to illustrate the proposed model which is solved by ε-constrains method to obtain the Pareto fronts and three scenarios: minimum operating cost, minimum environmental impacts, and the best compromise. For all scenarios, increasing temperature and decreasing pressure can reduce both the operating cost and environmental impacts. The decreasing of sulfur content in product is at the expense of consuming more utilities. It is not always favorable when the sulfur content of the product is decreasing. Thus, there is an optimum desulfurization degree in the HDT unit when reducing the environmental impacts. Therefore, the environmental impacts of an HDT process, especially for the impacts of the production process, should not be ignored when optimizing an HDT process. The most efficient way to reduce both the operating cost and environmental impacts is to reduce the hydrogen consumption.
中文翻译：
基于加氢反应动力学的加氢工艺多目标操作优化
加氢处理（HDT）装置中的公用事业消耗正在迅速增加，因为正在处理更多的重质和高质原油以满足清洁燃料不断增长的市场需求，从而导致直接和间接排放CO 2和SO 2。优化HDT装置时，应考虑公用事业对环境的影响。基于加氢反应动力学，提出了一种多目标优化方法，以降低运营成本和对公用事业和产品的环境影响。采用裂化的柴油热重机组来说明所提出的模型，该模型通过ε约束方法求解，获得了帕累托前沿和三种情况：最小的运行成本，最小的环境影响和最佳的折衷方案。在所有情况下，提高温度和降低压力都可以降低运营成本和环境影响。产品中硫含量的降低是以消耗更多公用事业为代价的。当产品的硫含量降低时，并不总是有利的。因此，减少环境影响时，HDT装置的脱硫度最佳。因此，在优化HDT流程时，不应忽略HDT流程对环境的影响，尤其是对生产流程的影响。降低运营成本和环境影响的最有效方法是减少氢气消耗。
更新日期：2018-11-07
中文翻译：
基于加氢反应动力学的加氢工艺多目标操作优化
加氢处理（HDT）装置中的公用事业消耗正在迅速增加，因为正在处理更多的重质和高质原油以满足清洁燃料不断增长的市场需求，从而导致直接和间接排放CO 2和SO 2。优化HDT装置时，应考虑公用事业对环境的影响。基于加氢反应动力学，提出了一种多目标优化方法，以降低运营成本和对公用事业和产品的环境影响。采用裂化的柴油热重机组来说明所提出的模型，该模型通过ε约束方法求解，获得了帕累托前沿和三种情况：最小的运行成本，最小的环境影响和最佳的折衷方案。在所有情况下，提高温度和降低压力都可以降低运营成本和环境影响。产品中硫含量的降低是以消耗更多公用事业为代价的。当产品的硫含量降低时，并不总是有利的。因此，减少环境影响时，HDT装置的脱硫度最佳。因此，在优化HDT流程时，不应忽略HDT流程对环境的影响，尤其是对生产流程的影响。降低运营成本和环境影响的最有效方法是减少氢气消耗。
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