CARBON-BASED CATALYST FOR FLUE GAS DESULPHURISATION AND METHOD OF PRODUCING SAID CATALYST AND USE THEREOF IN REMOVING MERCURY FROM FLUE GASES Russian patent published in 2012 - IPC B01J21/18 B01J27/08 B01J31/06 B01J33/00 B01J37/22 B01D53/48 B01D53/64 B01D53/86 

FIELD: chemistry.

SUBSTANCE: carbon-based catalyst for flue gas desulphurisation is brought into contact with flue gases containing at least gaseous SO₂, oxygen and water vapour so that gaseous SO₂ can react with oxygen and water vapour to form sulphuric acid which needs to be extracted. The inside of the pores of the catalyst are first moistened. Iodine, bromine or a compound thereof is introduced onto the surface of the carbon-based catalyst as a result of addition, ion exchange or deposition onto the support and water-repellent treatment is carried out. As a result of water-repellent treatment, the catalyst contains a resin which is characterised by limiting wetting angle with respect to water of 90° or more. The carbon-based catalyst can also be used as a mercury adsorbent for treating flue gases, which is meant to adsorb and remove mercury metal from flue gases containing mercury metal, gaseous SO₂, oxygen and water vapour.

EFFECT: degree of mercury removal reaches 100%, the catalyst retains stable activity on desulphurisation and removal of mercury during a long period of time without deterioration of properties.

15 cl, 1 tbl, 11 dwg, 14 ex