Preparation of perlite-based carbon dioxide absorbent

Area of Science:

• Chemical Engineering
• Materials Science
• Environmental Science

Background:

• Efficient carbon dioxide (CO2) capture is crucial for environmental remediation and industrial processes.
• Existing CO2 absorbents often face limitations in capacity, efficiency, or flow resistance.

Purpose of the Study:

• To develop and characterize a new, highly efficient CO2 absorbent.
• To evaluate its performance against commercial alternatives for gas analysis and purification.

Main Methods:

• Preparation of a novel absorbent composite containing sodium hydroxide, expanded perlite, and an acid-base indicator.
• Testing of absorption efficiency, capacity, flow resistance, and colorimetric indication.
• Comparative analysis with commercially available CO2 absorbents.

Main Results:

• The developed absorbent achieved CO2 concentrations as low as 3.3 parts per billion (volume/volume).
• It demonstrated a high absorption capacity, capturing at least 35% of its weight in CO2.
• The absorbent exhibited significantly lower flow resistance compared to commercial products, alongside sharp color indication.

Conclusions:

• The new composite material presents a highly efficient and effective solution for CO2 absorption.
• Its low flow resistance and clear indication make it advantageous for gas analysis and purification applications.