A new technique of carbon capture by ammonia with the reinforced crystallization at low carbonized ratio and initial experimental research

•A new technique of carbon capture by ammonia was put forward in this paper.•Aqueous ammonia mixed in alcohols was applied in this new technique.•Absorbent capacity could reach 1.64 kgCO2/kgNH3 by experiments.•Thermal energy for crystal regeneration was much less by estimation.

A new technique of carbon capture by ammonia with the reinforced crystallization was put forward in this paper in view of existing problems. Through the application of low concentration of ammonia with alcohols added in to reinforce crystallization process, ammonia escapes less, and the load capacity increases and at the same time, low energy consumption of regeneration could be achieved easily. By experiments and theoretical calculation, it was found that the absorbent capacity could reach 1.64 kgCO2/kgNH3, and ammonia escape at the outlet could be neglected. What's more, through rough estimation, thermal energy consumption for regeneration was only about 1/3 as much as that of conventional rich solution regeneration. In conclusion, the new technique is an improvement with great advantages for carbon capture by ammonia.