通过严格模拟和详细优化评估利用二氧化碳生产碳酸二甲酯的工艺

IF 2.7 4区 环境科学与生态学 Q3 ENERGY & FUELS
Zhe Sun, Heyu Li, Yan Cao
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引用次数: 0

摘要

二氧化碳衍生碳酸二甲酯(DMC)的合成工艺变得非常精细,但在 DMC 蒸馏过程中能耗较高。本研究比较了变压蒸馏法和萃取蒸馏法的 DMC-MeOH 共沸物分离工艺,并以年总成本(TAC)最小为目标函数,优化了包括塔盘总数和混合液进料位置在内的关键操作参数。在此优化基础上,对不同蒸馏工艺进行了经济性评估,发现萃取蒸馏比变压蒸馏更经济。与原有的变压蒸馏和萃取蒸馏工艺相比,应用由萃取蒸馏升级而来的分壁蒸馏工艺可显著降低最低年总成本,降幅分别为 37.4% 和 10.7%。基于掐头技术对相关热交换网络进行优化后,其热公用设施和冷公用设施的能耗分别降低了 27.2% 和 25.9%。对 DMC 蒸馏过程进行的碳生命周期评估(LCA)显示,超过 50% 的能源和碳排放来自蒸汽消耗,减少蒸汽消耗可显著减少二氧化碳排放、能源消耗和最终成本。© 2024 化学工业协会和 John Wiley & Sons, Ltd. 保留所有权利。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of dimethyl carbonate production process from CO2 by rigorous simulation and detailed optimization

The CO2-derived dimethyl carbonate (DMC) synthesis process becomes greatly attentive but suffers high energy consumption in DMC distillation process. In this work, the DMC-MeOH azeotropes separation process by pressure swing distillation and extractive distillation was compared, and key operating parameters, including the total number of trays and the feeding position of the mixture liquid, were optimized with the minimum total annual cost (TAC) as the objective function. On the basis of this optimization, economic evaluation of different distillation processes was conducted, and it was found that extractive distillation was more economical than pressure swing distillation. The application of the dividing-wall distillation process upgraded by extractive distillation can significantly reduce the minimum annual total cost by 37.4% and 10.7% compared to the original pressure swing distillation and extractive distillation process, respectively. The optimization of relevant heat exchange network based on pinch technology resulted in energy consumption reduction by 27.2% and 25.9% for its hot and cold utilities, respectively. Carbon life cycle assessment (LCA) on the DMC distillation process revealed over 50% of energy as well as carbon emissions from steam consumption, whose reduction can significantly minimize CO2 emissions, energy consumption, and ultimate cost. © 2024 Society of Chemical Industry and John Wiley & Sons, Ltd.

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来源期刊
Greenhouse Gases: Science and Technology
Greenhouse Gases: Science and Technology ENERGY & FUELS-ENGINEERING, ENVIRONMENTAL
CiteScore
4.90
自引率
4.50%
发文量
55
审稿时长
3 months
期刊介绍: Greenhouse Gases: Science and Technology is a new online-only scientific journal dedicated to the management of greenhouse gases. The journal will focus on methods for carbon capture and storage (CCS), as well as utilization of carbon dioxide (CO2) as a feedstock for fuels and chemicals. GHG will also provide insight into strategies to mitigate emissions of other greenhouse gases. Significant advances will be explored in critical reviews, commentary articles and short communications of broad interest. In addition, the journal will offer analyses of relevant economic and political issues, industry developments and case studies. Greenhouse Gases: Science and Technology is an exciting new online-only journal published as a co-operative venture of the SCI (Society of Chemical Industry) and John Wiley & Sons, Ltd
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