The removal of carbon dioxide from biogas or flue gases can be achieved through adsorption separation technologies. The aim of this work is the characterization and classification of some non-synthetic zeolites that could be used as carbon dioxide adsorbents, considering the physical properties of their crystalline structure, the adsorption equilibrium, and the saturation time. The tested material is tuff. The CO2 adsorption capacity of each sample is measured with a small-scale laboratory unit. The adsorption isotherm is obtained from experimental data. Breakthrough curves are determined for different flow rates using a mixture of CO2 and a negligibly adsorbed gas (N2). Porosity, pore size distribution, and specific surface area are obtained with mercury intrusion porosimetry. Results show that natural zeolites are a promising alternative to synthetic zeolites in pressure swing adsorption (PSA) processes for CO2 removal.
Adsorption Properties of Tuff for Carbon Dioxide Removal
AQUINO, ANDREA;BONAMENTE, EMANUELE;BURATTI, Cinzia;COTANA, Franco;ROSSI, Federico;FILIPPONI, MIRKO;
2016
Abstract
The removal of carbon dioxide from biogas or flue gases can be achieved through adsorption separation technologies. The aim of this work is the characterization and classification of some non-synthetic zeolites that could be used as carbon dioxide adsorbents, considering the physical properties of their crystalline structure, the adsorption equilibrium, and the saturation time. The tested material is tuff. The CO2 adsorption capacity of each sample is measured with a small-scale laboratory unit. The adsorption isotherm is obtained from experimental data. Breakthrough curves are determined for different flow rates using a mixture of CO2 and a negligibly adsorbed gas (N2). Porosity, pore size distribution, and specific surface area are obtained with mercury intrusion porosimetry. Results show that natural zeolites are a promising alternative to synthetic zeolites in pressure swing adsorption (PSA) processes for CO2 removal.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
