In response of such problems as ammonia escape

high regeneration energy

low absorption rate in the late stage of carbon capture by ammonia

this paper presents two kinds of reinforced crystallization technologies based on solventing-out

respectively called mixed absorbent process and reinforced crystallization of carbonized aqueous ammonia. Reinforcing crystallization of aqueous ammonia of low carbonization degree can maintain average absorption rate at a high level and regeneration by desorbing crystal product can save regeneration energy. Ammonia of low carbonization degree is chosen as absorbent

which can solve the ammonia escape problem to some extent. In the two kinds of processes

the common point is that regeneration by desorbing crystal product replaces recycling of carbonized aqueous ammonia and consequently saves regeneration energy. These two new processes all adopt semi-continuous bubbling reactor

and their process route

absorption rate

crystallization yield

characteristics of crystal product are compared.