Preliminary cost evaluation of integrated aqueous ammonia capture with mineralisation using recyclable salts for distributed CCS

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Abstract

Carbon dioxide capture and storage by mineralization (CCSM), also known as ex-situ mineralization, is an important technology for industrial CCS. The integration of CO2 capture using aqueous ammonia with ex-situ mineralisation avoids stripping CO2 as pure gas from absorbents and compression of c, and therefore, potentially reduces the high energy consumption of capture. It was found that the solid liquid ratio has a large influence on the energy consumption cost. Therefore, in this study, two different solid liquid ratios values were used for evaluating the OPEX in terms of energy consumption, chemical costs and feedstock cost. The results show that the total cost to sequestering 1 t CO2 is 100 US$ and 119 US$ for the 50 and at 300 g/l case, respectivelt. Using low solid to liquid ratio (50 g/l) resulted in large streams in the process, and thus resulting in a high energy consumption. However, high solid to liquid ratio (300 g/l) decreases the dissolution and carbonation efficiencies.

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Wang, X., Maroto-Valer, M., Shiwang, G., & Shisen, X. (2013). Preliminary cost evaluation of integrated aqueous ammonia capture with mineralisation using recyclable salts for distributed CCS. In Energy Procedia (Vol. 37, pp. 2529–2535). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2013.06.135

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