Energy Saving CO2 Absorption Process（ESCAP）

by Daisuke Hagiu

Publisher - Nippon Steel & Sumikin Engineering CO., LTD., Fukuoka, Japan

Category - General Novel

ESCAP (Energy Saving CO2 Absorption Process) has been developed as the most efficient energy cut-off chemical absorption process for carbon dioxide capture. In order to develop a high performance process, the test plants were placed near the blast furnace in a steel works to take in actual BFG (Blast Furnace Gas) and had been operated for about totally 9,000 hours in three years. As a result of the development, the new absorption process realized 43% reduction relative to the conventional process of heat energy consumption which occupies majority of CO2 recovery cost. In addition, we succeeded in lowering regeneration temperature than conventional. This result enabled to utilize waste heat at low temperature that was not utilized yet and to reduce the unit price of heat energy. Furthermore we added our original functionality to satisfy the production of high purity CO2, including beverages, etc., and commercialized as "ESCAP". The first commercialized plant was constructed in 2014, the source gas of which is HSG (Hot Stove Gas) of a steel works and product CO2 is utilized mainly for beverage and dry ice. In addition to these usages, ESCAP has many application for CO2 utilize or CO2 removal. At the end of this paper, new CO2 supply scheme by ESCAP is suggested and the cost merit of ESCAP to the conventional way is showed.

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