Purification of gas emissions from sulfur dioxide by means of activated granulated sorbent
Abstract
A catalytic chemisorption system based on Angren kaolin containing metal oxides has been developed intended for purification of gas emissions of industrial enterprises from the most dangerous atmospheric pollutants - sulfur dioxide and other volatile sulfur-containing compounds. The main components of the system are aluminium oxide (13–15% wt.) and iron(III) oxide (13–18% wt.). The system is used in the form of granules obtained by preliminary thermal-stream activation. The influence of temperature, time and pre-treatment with water and nitrogen vapors on the efficiency of sulfur dioxide extraction from gas emissions using the developed catalytic chemisorption system has been studied. The demonstrated possibility of applying polymetallic material of natural origin for cleaning gas emissions opens up new opportunities for using ash and slag based waste produced by metallurgical industrial enterprises, for the same purpose. This would make it possible to extract valuable metals from the waste, and also use the spent catalytic system for producing fertilizers or as a coagulant for wastewater treatment of the same enterprise. All these potential benefits could make the proposed technology almost completely wasteless.
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