Fibrous amino carboxylic sorbent for air purification from sulfur dioxide

Abstract

Fibrous amino carboxylic sorbent with cationic exchange capacity of 2.0 m-eq/g and anionic exchange capacity 4.2 m-eq/g has been prepared by new accelerating method from industrial polyacrylonitrile Nitron C fiber. Physical chemical and sorption properties of this material were investigated. It has been determined that: 1) polymer contains two kinds of anion exchange groups with different basicity; 2) swelling of ion exchanger have minimum at pH 9,5-10,0 ( W = 1,5 gН₂О/g); 3) critical relative humidity is ~ 65 %; 4) maximum sorption capacity on sulfur dioxide is ~ 2.5 m-eq/g; 5) length of mass transfer zone is 2.2 mm.