The Diffusion Behavior of CO2 Adsorption from a CO2/N2 Gas Mixture on Zeolite 5A in a Fixed-Bed Column
Atmosphere
; 13(4):513, 2022.
Article
Dans Anglais
| ProQuest Central | ID: covidwho-1809676
ABSTRACT
The objective of this research was to investigate the behavior and conditions for CO2 adsorption using a mixture of CO2/N2 over a fixed-bed column of zeolite 5A. The study was performed with a variation in gas composition of CO2/N2 as a 20/80, 50/50, and 80/20 volume %, the adsorption temperatures as 298, 333, and 373 K and the total feed flow rates as 1, 2, and 4 L/h under 100 kPa pressure. The Bohart–Adams, Yoon–Nelson, and Thomas models were used to predict the breakthrough behavior of CO2 adsorption in a fixed column. Furthermore, the adsorption mechanism has been investigated using the kinetics adsorption of pseudo-first-order, pseudo-second-order, Boyd model, and intraparticle model. Increasing the CO2 composition of a gas mixture resulted in a high CO2 adsorption capacity because of the high partial pressure of CO2. The capacity of CO2 adsorption was decreased with increasing temperature because of physical adsorption with an exothermic reaction. The CO2 adsorption capacity was also decreased with increasing feed flow rates with inadequate time for CO2 adsorbates diffusion into the pores of the adsorbent before exiting the packed bed. The CO2 adsorption by zeolite 5A confirmed that the physical adsorption with intraparticle diffusion was the rate-controlling step of the whole process.
Meteorology; porous materials; zeolite 5A; carbon dioxide; nitrogen; adsorption; Feed composition; Flow rates; Packed beds; Adsorbates; Air pollution; Ratios; Diffusion; Zeolites; Energy consumption; Climate change; Industrial plant emissions; Efficiency; COVID-19; Membrane separation; Zeolite; Gas composition; Greenhouse gases; Partial pressure; Gas mixtures; Medical research; Coronaviruses; Feed; Mathematical models; Adsorbents; Exothermic reactions; Emissions; Kinetics; Capacity; Research methodology; Pandemics; Diffusion rate; Flue gas; Flow velocity
Texte intégral:
Disponible
Collection:
Bases de données des oragnisations internationales
Base de données:
ProQuest Central
langue:
Anglais
Revue:
Atmosphere
Année:
2022
Type de document:
Article
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