SO ADSORBENT MATERIAL, PRODUCTION METHOD AND USE THEREOF, AND METHOD FOR REMOVING SO FROM FLUE GAS CONTAINING SO Russian patent published in 2023 - IPC B01J20/22 B01J20/282 B01J20/32 B01J20/34 B01D53/02 B01D53/50 

FIELD: desulfurization.

SUBSTANCE: group of inventions relates to an SO₂ adsorbing material, a method for producing an SO₂ adsorbing material, the use of an SO₂ adsorbing material in the desulfurization area, and a method for removing SO₂ from flue gas containing SO₂. SO₂ adsorbing material is presented comprising carbonized organometallic skeletal material and sulphite deposited on carbonized organometallic skeletal material, and carbonized organometallic skeletal material is a carbonized material obtained by treatment of organometallic skeletal material with carbonization, whereas the introduced amount of sulphite is not more than 10 wt.% based on the total weight of the SO₂ absorbent material. In another embodiment, a method for producing an SO₂ absorbent material is provided, which comprises treating the organometallic framework material with carbonization to remove at least a portion of the metallic elements contained in the organometallic framework material to form a carbonized organometallic framework material; applying sulphite to the carbonized organometallic framework material to form an SO₂ absorbent material; wherein said carbonized organometallic framework material and said sulphite are used in such an amount that the amount of sulphite introduced does not exceed 10 wt% based on the total weight of the SO₂ absorbing material. The use of an SO₂ adsorbent material in a desulfurization field is also presented, and a method for removing SO₂ from an SO₂ containing flue gas is presented, including the step of bringing the SO₂ adsorbing material into contact with the SO₂ containing flue gas to be treated for adsorptive purification.

EFFECT: group of inventions provides SO₂ adsorbing material, which has excellent SO₂ adsorption capacity, excellent physical adsorption capacity in the presence of water vapor. In addition, the present SO₂ adsorbent material can be recycled and reused through desorption and regeneration, whereas the SO₂ adsorption capacity remains at a relatively high level after many adsorption-desorption cycles.

14 cl, 1 dwg, 3 tbl, 13 ex