Abstract
Thermally activated Palygorskite (Pg) has been found to be a good adsorbent material for ammonia (NH3) and sulfur dioxide (SO2). This research investigated the effect of thermal treatment on pore structure and surface acid–alkali properties of Pg through the adsorption–desorption of NH3 and SO2. The results showed that, up to 200°C, the adsorption of NH3 on Pg was significantly higher than SO2. This was due to NH3 being adsorbed in the internal surface of Pg and forming hydrogen bonds (H-bonds) with coordinated water. The increase in thermal treatment temperature from 150 to 550°C, showed a gradual decrease in the number of surface acid sites, while the number of surface alkaline sites increased from 200 to 400°C. The change of surface acidity–alkaline sites is due to the collapse of internal channels of Pg and desorption of different types of hydroxyls associated with the Pg structure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
