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Combined heat and power generation with lime production for direct air capture

机译：热电联产与石灰生产相结合，可直接捕获空气

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摘要

Carbon capture and storage (CCS) has been shown to be the least cost-intensive option for decarbonisation of the power, heat, and industrial sectors. Importantly, negative-emission technologies, including direct air capture (DAC), may still be required after near-complete decarbonisation of the stationary emission sources. This study evaluates the feasibility of a novel polygeneration process for combined heat and power using a solid-oxide fuel cell, and lime production for DAC (CHP-DAC) that could contribute towards decarbonisation of the power, heat, and industrial sectors. Evaluation of the thermodynamic performance indicated that such process can achieve the total efficiency and effective electric efficiency of 65%(LHV) and 60(LHV), respectively, while removing CO2 from the air at a rate of 88.6 gCO(2)/kW(ch)h. With the total expenditure spread over a number of revenue streams, the product prices required for the CHP-DAC process to break even were found to be competitive compared to figures for the existing standalone technologies, even if there was no revenue from CO2 capture from the air. Moreover, the considered process was shown to be economically feasible, even under uncertainty. Hence, it can be considered as the carbon neutral polygeneration process for sustainable and affordable production of heat, power, and lime that is negative-emission ready.
机译：事实证明，碳捕集与封存（CCS）是电力，热力和工业部门脱碳中成本最低的选择。重要的是，在固定排放源几乎完全脱碳后，仍可能需要包括直接空气捕集（DAC）在内的负排放技术。这项研究评估了使用固体氧化物燃料电池的新型热电联产多联产工艺的可行性，以及用于DAC（CHP-DAC）的石灰生产，这可能会导致电力，热力和工业部门的脱碳。对热力学性能的评估表明，该工艺可实现总效率和有效电效率分别为65％（LHV）和60（LHV），同时以88.6 gCO（2）/ kW（ ch）h。由于总支出分布在许多收入流中，因此即使没有从二氧化碳捕集的二氧化碳中获得任何收入，CHP-DAC工艺达到收支平衡所需的产品价格也比现有独立技术的价格更具竞争力。空气。而且，即使在不确定的情况下，所考虑的过程也被证明在经济上是可行的。因此，可以将其视为碳中和的多联产过程，以可持续且负担得起的方式生产负热的热，电和石灰。

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