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Effects of Various Parameters on Removal of NO2 Gases in Fixed Beds by Adsorption on Sepiolite
Authors:Murathan  Atilla  Biçer  Ahmet  Alicilar  Ahmet  Murathan  Ayse
Institution:1. Engineering Architecture Faculty, Chemical Engineering Department, Gazi University, Maltepe, Ankara, Turkey
2. Turkish Standards Institute, Bakanliklar, Ankara, Turkey
Abstract:Removal of NO2 gases in fixed beds was investigatedby using brownish, whitish and regenerated whitish sepioliteand perlite as adsorbents. For this purpose, NO2 wasproduced by reaction of copper with nitric acid. The producedgas was mixed with air and the mixture was sent through a fixedbed. Studies were conducted using various gas flow rates,NO2 concentrations, packing sizes and heights of bed.Remaining NO2 within the gas mixture leaving the column,unadsorbed on packing, was further absorbed by passing itthrough a series of washing bottles, filled by a solution ofNaOH. At the end of the study, it was observed that theadsorption capacity of sepiolites, especially whitishsepiolite, was much higher than that of perlite. Additionally,it was seen that its adsorption capacity increased withincreasing bed height, particle size, NO2 concentrationand decreasing gas flow rate.
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