To mitigate climate change, the reduction of anthropogenic CO₂ emissions is of paramount importance. CO₂ capture and storage has been identified as a promising short- to midterm solution, yet the underground storage of CO₂ faces often severe public resistance. In this regard, the conversion of the CO₂ captured into useful chemicals or fuels is an attractive alternative. Here, we propose and experimentally demonstrate a process that directly integrates CO₂ utilization into CO₂ capture allowing for the full conversion of the CO₂ captured and the selective production of a synthesis gas. The process is attractive both economically and from a process operation point of view as the coupled reactions are performed in a single reactor. The concentration of (unreacted) CO₂ in the off-gas is below 0.08%, demonstrating the almost full conversion of the CO₂ captured in a single, integrated step. Importantly, the process is demonstrated using a nonprecious metal catalyst and an inexpensive naturally occurring CO₂ sorbent, viz., limestone.

中文翻译：

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集成的CO ₂捕集和转化是一种高效的温室气体燃料处理方法

为了减轻气候变化，人为减少CO ₂排放至关重要。CO _2的捕集与封存已被认为是一种有前途的短期至中期解决方案，但是地下的CO ₂封存通常面临着严重的公众阻力。在这方面，将捕获的CO ₂转化为有用的化学品或燃料是一种有吸引力的选择。在这里，我们提出并通过实验证明了一种将CO ₂利用率直接整合到CO ₂捕集中的过程，从而可以完全转化CO ₂捕获并选择性生产合成气。由于偶联反应在单个反应器中进行，因此该方法在经济上和从工艺操作的角度都具有吸引力。废气中（未反应的）CO ₂的浓度低于0.08％，这表明在一个单一的集成步骤中捕获的CO ₂几乎完全转化。重要的是，使用非贵金属催化剂和廉价的天然存在的CO ₂吸附剂（即石灰石）证明了该方法。