Comparative analysis and impact assessment on the electricity price of traditional carbon capture methods and that of direct precipitation of CO2 with the addition of Ca(OH)2 in the scope of a case study in Shenzhen.

Abstract

With the dramatic increase in global temperature, carbon dioxide is one of the major culprits. Scholars are seeking ways to maintain or decrease the carbon emission level globally in modern days. Carbon Capture and Storage (CCS) addresses this issue, and mineralization of CCS turns out to be the most secure method because carbonate (CO3) produced out of mineralization is harmless and can be found in Earth crusts with abundance. Amine solutions are introduced to be incorporated into the CCS and can accelerate the conversion. However, the amine regeneration results in high operational costs and energy penalties in traditional methods. The addition of Ca(OH)2 can address this problem and has a conversion rate as high as 97.4%. This new method also makes fossil-fuel-based CCS more competitive. Future breakthroughs are still needed to make CCS cheaper and provide stable renewable energy supplies, enabling carbon neutrality to be more promising.