Energy and Economic Analysis of the Hydrothermal Reduction of CO2 into Formate,Industrial & Engineering Chemistry Research

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Energy and Economic Analysis of the Hydrothermal Reduction of CO2 into Formate
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-09-22 , DOI: 10.1021/acs.iecr.1c01961
Laura Quintana-Gómez _{1,

2} , Lidia Martínez ₁ , Daniel Román-González _{1,

2} , José Juan Segovia _{2,

3} , Ángel Martín _{1,

2} , Maria Dolores Bermejo _{1,

2}

Affiliation

In this work, the mass and energy balances and the economic analysis of a continuous process for the reduction of CO₂ (captured as NaHCO₃) into sodium formate using Zn as the reductant are studied. The reaction in hydrothermal media has the advantage of easily integrating the conversion system with the CO₂ capture process by absorption in basic solutions. The process conditions (pressure, Zn/NaHCO₃ molar ratio, and residence time) were theoretically optimized. A reaction temperature of 275 °C was selected, obtaining formate yields greater than 70%. A continuous process design was proposed based on available information and on our experimental experience in the process. Mass and energy balances were solved and the potential for an energy integration was studied. Additionally, both capital and operating costs for a plant treating 1000 kg/h of CO₂ were estimated. The cost calculated for transforming CO₂ was EUR 1.28/kg CO₂.

中文翻译：

CO2水热还原成甲酸盐的能源和经济分析

在这项工作中，研究了使用 Zn 作为还原剂将CO ₂（捕获为 NaHCO ₃）还原为甲酸钠的连续过程的质量和能量平衡以及经济分析。在水热介质中的反应具有通过在碱性溶液中吸收而将转化系统与 CO ₂捕获过程轻松集成的优点。工艺条件（压力，Zn/NaHCO ₃摩尔比和停留时间）在理论上进行了优化。选择 275 °C 的反应温度，获得大于 70% 的甲酸盐收率。根据现有信息和我们在该过程中的实验经验，我们提出了一种连续工艺设计。解决了质量和能量平衡问题，并研究了能量整合的潜力。此外，还估算了处理 1000 kg/h CO ₂的工厂的资本和运营成本。转化 CO _{2 的}计算成本为1.28 欧元/kg CO ₂。

更新日期：2021-10-06

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