Study of SO<sub>2</sub> Adsorption on Porous SiO<sub>2</sub> Particles Using a Micro-Reactor System

Abstract

Abstract:Immobilized ionic liquids (ILs) with high selective adsorption capacity of SO 2 from N 2 , on porous solid particles such as SiO 2 , has potential applications on SO 2 emission control. As the first step towards the establishment of a comprehensive model for SO 2 adsorption on supported IL, the performance of neat SiO 2 , the support material, was evaluated in this work. A series of adsorption/desorption breakthrough experiments were carried out using a micro-reactor system to investigate the effects of concentration, particle structure and temperature. Theoretical analyses of experimental observations were used to identify the adsorption mechanisms and relative importance of mass transfer processes.

A Study on the Ability of Nanomaterials to Adsorb NO and SO2 from Combustion Gases and the Effectiveness of Their Separation

“…For SiO 2 , the large volume of the pores, the specific surface, and the large functional mesoporous silica, which exhibits a framework texture of wormholes, made possible the physical sequestration of SO 2 in the adsorbent-material functionalized structure [63,64]. This type of adsorption follows Henry's law, being proportional to the internal surface area [65]. The adsorption was in accordance with the descriptions in the specialized literature, namely an interaction with the hydroxyl groups, a mechanism with two means of manifestation: (i) intermolecular, with the formation of a hydrogen bond between the functional group and the oxygen in SO 2 and (ii) intramolecular, forming SO 2 by two additional covalent O-S bonds [66].…”