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首页> 外文期刊>Journal of natural gas science and engineering >Incorporating differential evolution (DE) optimization strategy to boost hydrogen and DME production rate through a membrane assisted single-step DME heat exchanger reactor
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Incorporating differential evolution (DE) optimization strategy to boost hydrogen and DME production rate through a membrane assisted single-step DME heat exchanger reactor

机译：通过膜辅助单步DME换热器反应器，采用差异演化（DE）优化策略来提高氢气和DME的生产率

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摘要

The present contribution aims to enhance dimethyl ether (DME) production rate as well as hydrogen as clean-burning fuels and versatile applications. In this regard, a thermally coupled membrane configuration (TCMDR), which is able to produce hydrogen and DME simultaneously, is proposed. Here, direct DME synthesis from syngas and cyclohexane dehydrogenation reaction are coupled and occur in the exothermic and endothermic compartments, respectively. The dehydrogenated product (hydrogen) is pushed through the wall of the third partition, which is a Pd/Ag membrane composite, in order to overcome the equilibrium constraints of dehydrogenation reaction. Moreover, the optimal operating conditions are sought by aid of differential evolution (DE) algorithm as a powerful optimization technique. During the optimization step, the sum of carbon monoxide and cyclohexane conversions along with the hydrogen mole fraction in the permeation side is considered as the objective function. Finally, the TCMDR behavior is examined based on the achievements during the optimization procedure and a one-dimensional steady-state heterogeneous model. The results show considerable DME enhancement in the TCMDR by 10.3% and 11.4% compared with the conventional direct DME synthesis reactor (CDR) and thermally coupled DME reactor (TCDR) arrangements and at the same time the amount of endothermic raw material drops about 120.3 kmol/h.
机译：本贡献旨在提高二甲醚（DME）的生产率以及氢气作为清洁燃烧的燃料和多种用途。在这方面，提出了一种能够同时产生氢和DME的热耦合膜构造（TCMDR）。在此，由合成气和环己烷脱氢反应进行的直接DME合成被耦合并分别在放热室和吸热室中发生。为了克服脱氢反应的平衡约束，将脱氢产物（氢）推入第三隔板的壁中，该第三隔板是Pd / Ag膜复合材料。此外，借助于微分进化（DE）算法作为一种强大的优化技术，寻求了最佳操作条件。在优化步骤中，一氧化碳和环己烷的转化总和以及渗透侧的氢摩尔分数被视为目标函数。最后，基于优化过程中的成果和一维稳态异质模型，检查了TCMDR行为。结果显示，与常规直接DME合成反应器（CDR）和热耦合DME反应器（TCDR）布置相比，TCMDR中的DME显着提高了10.3％和11.4％，同时吸热原料的量下降了约120.3 kmol /H。

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