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Real Time Optimization of a Reactor–Separator–Recycle Process I: Steady State Modeling
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2018-09-07 , DOI: 10.1021/acs.iecr.8b00839
Vivek Kumar 1 , Nitin Kaistha 1
Affiliation  

Steady state real time optimization (RTO) of a reactor–separator–recycle process is studied. The reaction A + BC occurs in the reactor with the separator recycling unreacted A and B and recovering nearly pure C bottoms product. Two operating scenarios, Mode I (fixed throughput) and Mode II (maximum throughput), are considered. In Mode I, the column boil-up is minimized using available degrees-of-freedom (dofs). In Mode II, the dofs are optimized for maximizing throughput. It is shown that the reactor B composition set point is unconstrained and economically dominant in both Mode I and Mode II. Its optimum value is efficiently obtained by fitting a simple reaction kinetic model to the available plant flow and reactor composition data (current and past) and adjusting the separator tray section efficiencies to best fit the current temperature profile. Results show that RTO improves economic benefit by up to 10% over constant set point operation.

中文翻译:

反应器-分离器-循环过程的实时优化I:稳态建模

研究了反应堆-分离器-循环过程的稳态实时优化(RTO)。反应器A + BC发生在反应器中,分离器将未反应的AB循环,并回收几乎纯净的C底部产物。考虑了两种操作方案,即模式I(固定吞吐量)和模式II(最大吞吐量)。在模式I中,使用可用的自由度(dofs)最小化了柱沸腾。在模式II中,优化了自由度以最大化吞吐量。结果表明,反应器B在模式I和模式II中,合成设定点不受限制,并且在经济上占主导地位。通过将简单的反应动力学模型拟合到可用的工厂流量和反应器组成数据(当前和过去的数据),并调整分离器塔板部分的效率以最适合当前的温度曲线,可以有效地获得其最佳值。结果表明,相对于恒定的设定值运行,RTO可以将经济效益提高多达10%。
更新日期:2018-09-07
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