Adsorption of sulfur dioxide on chemically modified natural clinoptilolite. Acid modification
作者： Stephen J. Allen , Emilia Ivanova , Bogdana Koumanova
DOI: 10.1016/J.CEJ.2009.04.063
关键词: Clinoptilolite 、 Adsorption 、 Inorganic chemistry 、 Hydrochloric acid 、 Aluminium 、 Sulfur dioxide 、 Charring 、 Saturation (chemistry) 、 Chromatography 、 Zeolite 、 Chemistry
摘要: Natural Bulgarian clinoptilolite from the south-eastern Rhodopes mountain was modified through treatment with hydrochloric acid various normality, both single and repeatedly, as well a charring of preliminary obtained NH4-form. The parameters concerning uptake ion-exchangeable cations (Ca2+, Na+ K+), aluminium natural material were calculated on basis chemical contents. highest extent removal attained in case NH4Cl solution, while deficiency established samples treated by solutions increasing concentration. Sulfur dioxide adsorption decationised dealuminised studied according to frontal-dynamic method. breakthrough curves, namely time, saturation time some statistical moments curve distribution, determined. dynamic capacities also specified. Comparing momentum values it that result zeolite low concentrated acid, diffusion resistance decreases because dominant exchange presenting exchangeable smaller size protons enlargement pores opening. Intensified dealuminisation observed when more are used. capacity is enhanced, probably due an increase total pore volume.
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