Calcium based high temperature carbon dioxide absorbent

摘要

The present invention relates to a high temperature carbon dioxide absorbent and a method for producing the same which are regenerated to absorb carbon dioxide selectively after absorbing carbon dioxide from a high temperature mixed gas in the range of 450 to 800 ^o C including carbon dioxide. . Specifically, calcium oxide (CaO) is used as a carbon dioxide absorbing active material, and calcium aluminate (Ca ₁₂ Al _{14) is used} as an additive to secure the carbon dioxide absorption capacity and the carbon dioxide diffusion path during repeated carbon dioxide absorption and regeneration of the absorbent. It relates to a high temperature carbon dioxide absorbent using O ₃₃ ) and a method for producing the same. The high temperature carbon dioxide absorbent produced by mixing, drying, heat treatment, and then hydrating, drying, and heat treatment to dissolve the precursors of calcium oxide and calcium aluminate in water to have a uniform composition has a very high absorption capacity of carbon dioxide. It is not only high, but also has excellent stability in repetitive absorption of carbon dioxide and regeneration of the absorbent. Accordingly, the present invention relates to a high temperature carbon dioxide absorbent having a high stability and high carbon dioxide absorption capacity in repeated absorption / regeneration as listed above and a method for producing the same.;Carbon dioxide, absorption, high temperature absorber, calcium oxide, calcium aluminate