The CO oxidative coupling with methyl nitrite (MN) to dimethyl oxalate (DMO) in syngas-based ethylene glycol (EG) process faces challenges in low conversion and capacity per unit. In this work, by using a rigorous reactor model and NSGA-II algorithm, Pareto solutions balancing production capacity and safety were obtained to compare thermal control schemes. Under the specified domain, the optimized co-current-flow scheme achieved a DMO yield of 1.0 g/(g∙h), surpassing the conventional isothermal-coolant scheme (0.55 g/(g∙h)), and even under conservative conditions, the co-current scheme achieves 43% enhancement in capacity. Subsequently, the dynamic behavior of co-current reactor was compared with the isothermal-coolant one in much depth on the conditions determined by optimization of both performance and sensitivity. The results show that the reactor with co-current scheme provides the operators with twice more time to rectify operational biases, and an alarm of the wrong-way behavior when GHSV and inlet temperature are changed.

中文翻译：

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并流热管理CO氧化偶联反应器优化及安全分析


在合成气乙二醇（EG）工艺中，CO 与亚硝酸甲酯（MN）氧化偶联生成草酸二甲酯（DMO）面临着低转化率和单位产能的挑战。在这项工作中，通过使用严格的反应堆模型和NSGA-II算法，获得了平衡产能和安全性的Pareto解来比较热控制方案。在指定范围内，优化的并流方案实现了 1.0 g/(g∙h) 的 DMO 产率，超过了传统的等温冷却剂方案 (0.55 g/(g∙h))，甚至在保守条件下也是如此，并流方案实现容量提升43%。随后，在性能和灵敏度优化确定的条件下，对并流反应堆与等温冷却反应堆的动态行为进行了深入的比较。结果表明，采用并流方案的反应器为操作员提供了两倍以上的时间来纠正操作偏差，并在 GHSV 和入口温度发生变化时发出错误行为警报。