A sorbent composition, the preparation method thereof, and the process for removing sulfur oxides and nitrogen oxides in a flue gas by the sorbent composition

摘要

The present invention relates to a sorbent composition, the preparation method thereof, and the process for removing sulfur oxides and nitrogen oxides in a flue gas by the sorbent composition. The sorbent composition comprises a refractory inorganic oxide matrix, metal component I and metal component II, wherein said refractory inorganic oxide matrix has a specific surface area of more than 130 m2/g, said metal component I is selected from one or more element(s) of group IA and group IIA in the Periodic Table of Elements, and said metal component II is selected from one or more transition metal(s) of group IIB, group VIB, group VIIB, and group VIII in the Periodic Table of Element, and wherein said metal component II is present in at least two different valence-states, as characterized by the X-ray photoelectron spectroscopy. Compared with the prior art, the sorbent according to the present invention has a better property in removing sulfur and nitrogen substances, and has higher regeneration stability.