SEM-presentation of the sorption of NO x and ammonia on sepiolite papers

Abstract

The sorption of NOx and ammonia was performed on sepiolite paper, laboratory prepared from the mineral sepiolite and cellulose or glass fibers. It was found that nitric oxides are sorbed at room temperature; that, in the first adsorption-desorption cycles (desorption at 160 degrees C), a part of the oxides is il reversibly sorbed and the other part is physically reversibly sorbed, since the adsorbed and desorbed quantities of NOx are approximately constant during 30 cycles. Ammonia is only physically sorbed on the sepiolite in the paper, but after. saturation of the papers saturation with NOx, the sorbed quantity increases more than five times. Visualisation of some of the sorption products on the surface of the sepiolite paper is presented, in the form of SEM photographs.