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使用盐水进行反应性碳捕获:对潜在的来源,过程和产品的评估

Anya Dickinson-Cove¹, Erika La Plante², Yiming Liu³

¹Department of Civil & Environmental Engineering, University of California, Los Angeles, California, 90095, USA. jassby@ucla.edu.

Chemical Society reviews

|November 22, 2024

概括

使用盐水的反应性碳捕获为将二氧化碳 (CO2) 转化为有价值产品提供了一种经济高效的方法. 这种方法显示出大规模碳捕获的前景,尽管目前的市场限制.

科学领域:

环境科学环境科学
化学工程是化学工程的重要组成部分.
材料科学材料科学材料科学

背景情况:

反应式碳捕获 (RCC) 将二氧化碳的捕获和转化整合到一个单一步骤中,减少能源需求和成本.
盐水是RCC的一个有希望的媒介,因为它丰富,成本低,并且能够增强二氧化碳捕获和转化动力学.
盐水源可以提高二氧化碳含量,并为有价值的副产品形成提供必要的离子.

研究的目的:

审查和分类现有和新兴的利用盐水的活性碳捕获过程.
评估基于盐水的RCC对大规模碳捕获和封存的可行性.
确定基于盐水的RCC技术的局限性和未来研究方向.

主要方法:

用盐水捕获和转化二氧化碳的既定工业过程和新开发技术的文献综述.
将工艺分为电化学或化学定位类别的分类.
分析影响大规模应用可行性的因素,包括碳足迹,市场规模,能源需求和环境影响.

主要成果:

确定了使用盐水捕获和转化二氧化碳的20种新工艺和技术,以补充既有方法.
基于盐水的RCC工艺被分类为电化学和化学定位类型.
强调,虽然许多技术处于早期发展阶段,但副产品的市场规模是大规模碳捕获的主要限制.

结论:

基于盐水的RCC提供了显著的潜在好处,包括减少能源需求和产生有价值的副产品.
广泛采用的主要挑战是副产品市场规模和所需的碳捕获规模之间的不匹配.
这些技术可以通过将稳定,非危险的产品作为废物进行管理,从而适应碳封存,从而有可能克服市场限制.

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