Effect of Inorganic Additives and Sintering Temperature on Adsorbents

Abstract

Magnesium silicate is a porous material with a large specific surface area and is easily adsorbed. In particular, it is widely used commercially because it is very effective for adsorbing Na+, K+ ions and other catalysts. However, if the powder is used as an adsorbent as is, there are disadvantages, in that the adsorbed material is easily lost during the adsorption action and becomes difficult to recover. In this study, magnesium silicate was used as an adsorbent to remove pollutants (CO2) from the atmosphere. In addition, in order to overcome the disadvantages of using a powder adsorbent material, an inorganic binder (clay) and a reinforcing agent (glass fiber) were added to prepare a molded article which imparted strength to the adsorbent material. Changes in the properties of the adsorbent were confirmed. Changes in the physicochemical properties of the adsorbed material according to the calcination temperature, from 400 to 800°C, were confirmed. In addition, it was confirmed that a molded body with 15 wt% inorganic binder and 4 wt% reinforcing agent had a specific surface area of about 87 m²/g and a strength of 4.63 N. The prepared molded article could adsorb about 0.41 mmol/g of CO2 at atmospheric pressure, confirming its potential use as a CO2 adsorbent.