Operating Cost for CO2 Capture Process Using Aqueous Ammonia

In the present paper, we report the result of cost analysis associated with the operation of CO2 capture pilot facility using aqueous ammonia. The facility treating 1,000 Nm3/hr of BFG (blast furnace gas) is in operation with the production capacity of 10 t-CO2/d. From the pilot plant operation we found that the CO2 recovery was 90% and the purity of product CO2 was over 98%. Waste heat recovery system for steam generation was installed and integrated with the CO2 capture facility successfully. Operating cost analysis based on the running data of the facility has been performed based on the consumptions of steam, electricity, water, and chemical. Since the process uses waste heat recovery system, the majority of operating cost is the electricity consumption. Excluding the steam cost generated by the waste heat recovery system, the operating cost for the process was es timated under $20/t-CO2.