Managed pathways for CO2 mineralisation: analogy with nature and potential contribution to CCUS-led reduction targets,Faraday Discussions

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Managed pathways for CO2 mineralisation: analogy with nature and potential contribution to CCUS-led reduction targets
Faraday Discussions ( IF 3.3 ) Pub Date : 2021-2-12 , DOI: 10.1039/d0fd00142b
Colin D Hills ₁ , Nimisha Tripathi , Paula J Carey

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The managed mineralisation of CO₂ on mineral substrates has significant potential to mitigate CO₂ emissions to atmosphere, using processes that are analogous to the formation of limestone in nature. High-temperatures and pressures or ambient conditions can be applied in processes that compare with the natural chemical, hydrothermal or biological formation of limestone. In the UK, recent policy developments recognise the potential of carbon utilisation and a reduction target of 40 Mt by 2030 has been set. In the present work, the analogies between natural and managed carbonate-production are briefly reviewed and the potential gains for mineralisation technology employing flue-gas as a direct source of CO₂ are presented. With reference to selected UK solid waste arisings, our high-level analysis indicates mineralisation is capable of permanently sequestrating 1.2 Mt per year of CO₂ in carbonated construction products. At a European level, nearly 7.8 Mt of CO₂ can be managed in the same way. If indicative indirect CO₂ savings are also considered, maximum total CO₂ reductions of up to 3 and 30 Mt per year are possible in the UK and Europe, respectively. In respect of the UK’s CCUS-led CO₂ reductions for the 8 years to 2030, our high-level assessment suggests that up to 24 Mt, representing 60% of the ‘target’, may be met by the mineralisation of selected industrial process residues.

中文翻译：

二氧化碳矿化的管理途径：与自然的类比和对 CCUS 主导的减排目标的潜在贡献

CO ₂在矿物基质上的受控矿化具有巨大的潜力，可以使用类似于自然界中石灰石形成的过程来减少向大气中排放的CO ₂。高温和高压或环境条件可以应用于与石灰石的天然化学、热液或生物形成相比的过程。在英国，最近的政策发展认识到碳利用的潜力，并设定了到 2030 年减少 40 公吨的目标。在目前的工作中，简要回顾了天然碳酸盐生产和管理碳酸盐生产之间的类比，以及采用烟道气作为 CO ₂直接来源的矿化技术的潜在收益被提出。参考选定的英国固体废物产生，我们的高级分析表明，矿化能够在碳酸化建筑产品中永久封存每年 1.2 公吨的 CO ₂。在欧洲层面，近 7.8 Mt 的 CO ₂可以用相同的方式进行管理。如果还考虑指示性间接 CO ₂减排量，则英国和欧洲的CO ₂总减排量可能分别高达每年 3 和 30 Mt。关于英国在 2030 年之前 8 年内由CCUS 主导的 CO ₂减排，我们的高级评估表明，通过选定工业过程残留物的矿化，最多可以实现 24 Mt，占“目标”的 60% .

更新日期：2021-02-12

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