Energetic–Environmental–Economic Assessment of Integrated Different Carbon Capture and Compression Processes for High CO2 Concentration Gas,ACS Sustainable Chemistry & Engineering

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Energetic–Environmental–Economic Assessment of Integrated Different Carbon Capture and Compression Processes for High CO2 Concentration Gas
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-11-15 , DOI: 10.1021/acssuschemeng.3c05757
Sensen Shi _{1,

2} , Shaojuan Zeng ₁ , Fei Chang ₃ , Haichuan Yin ₄ , Guoxiong Zhan ₅ , Yuanmeng Duan ₁ , Kaikai Li _{1,

2} , Yinge Bai ₁ , Xiangping Zhang _{1,

2,

4}

Affiliation

In this work, a novel energetic–environmental–economic assessment methodology for different processes integrating carbon capture and compression was proposed. It was found that for acquiring high-pressure liquid CO₂ products, the pressurized desorption (PD) process is better than conventional atmospheric desorption. Based on this, quantitative and comprehensive evaluation and comparison between PD and cryogenic distillation (CD) processes of CO₂ concentrations ranging from 50 to 90% were analyzed. The results indicated that the PD process is more energy-intensive than the CD process due to the high regeneration heat. Meanwhile, the green degree analysis results showed that the CD process exhibits an environmental superiority over the PD process when the CO₂ concentration exceeds 50%. According to the cost analysis, the CD process presents an almost exponential drop in the total capture cost (TCC) as the CO₂ content increases, but the PD process is insensitive. Moreover, we developed a TCC model, taking the feed gas composition and flow rates as variables. It can be seen that as the flow rates of the feed gas are less than 1800 kmol/h, the PD process is more cost-effective than the CD process over a wide range below 73.02% CO₂ composition, providing a quantitative method to guide the optimal process selection and design.

中文翻译：

高二氧化碳浓度气体综合不同碳捕获和压缩过程的能量-环境-经济评估

在这项工作中，提出了一种针对整合碳捕获和压缩的不同过程的新型能源-环境-经济评估方法。研究发现，加压解吸(PD)工艺在获取高压液态CO ₂产品方面优于常规常压解吸。在此基础上，对CO ₂浓度在50%~90%范围内的PD和深冷蒸馏（CD）工艺进行了定量综合评价和比较。结果表明，由于再生热较高，PD 过程比 CD 过程更耗能。同时，绿色度分析结果表明，当CO ₂浓度超过50%时，CD工艺比PD工艺表现出环境优势。根据成本分析，随着CO ₂含量的增加，CD过程的总捕集成本(TCC)呈指数下降，但PD过程不敏感。此外，我们开发了一个 TCC 模型，以原料气成分和流量为变量。可以看出，由于原料气流量小于1800 kmol/h，在CO ₂成分低于73.02%的大范围内，PD工艺比CD工艺更具成本效益，为指导提供了定量方法。最佳工艺选择和设计。

更新日期：2023-11-15

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