CO2 adsorption using TiO2 composite polymeric membranes: A kinetic study

Sarah Hafeez, X Fan, Arshad Hussain, C F Martin

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

CO2 is the main greenhouse gas which causes global climatic changes on larger scale. Many techniques have been utilised to capture CO2. Membrane gas separation is a fast growing CO2 capture technique, particularly gas separation by composite membranes. The separation of CO2 by a membrane is not just a process to physically sieve out of CO2 through the controlled membrane pore size. It mainly depends upon diffusion and solubility of gases, particularly for composite dense membranes. The blended components in composite membranes have a high capability to adsorb CO2. The adsorption kinetics of the gases may directly affect diffusion and solubility. In this study, we have investigated the adsorption behaviour of CO2 in pure and composite membranes to explore the complete understanding of diffusion and solubility of CO2 through membranes. Pure cellulose acetate (CA) and cellulose acetate-titania nanoparticle (CA-TiO2) composite membranes were fabricated and characterised using SEM and FTIR analysis. The results indicated that the blended CA-TiO2 membrane adsorbed more quantity of CO2 gas as compared to pure CA membrane. The high CO2 adsorption capacity may enhance the diffusion and solubility of CO2 in the CA-TiO2 composite membrane, which results in a better CO2 separation. The experimental data was modelled by Pseudo first-order, pseudo second order and intra particle diffusion models. According to correlation factor R2, the Pseudo second order model was fitted well with experimental data. The intra particle diffusion model revealed that adsorption in dense membranes was not solely consisting of intra particle diffusion.
Original languageEnglish
Pages (from-to)163-171
Number of pages9
JournalJournal of Environmental Sciences
Volume35
Early online date9 Jul 2015
DOIs
Publication statusPublished - 1 Sep 2015

Fingerprint

Polymeric membranes
Composite membranes
membrane
Membranes
adsorption
Adsorption
Cellulose
kinetics
Kinetics
Gases
cellulose
Solubility
acetate
solubility
gas
Sieves
Greenhouse gases
Pore size
acetylcellulose
Titanium

Keywords

  • Global warming
  • Cellulose acetate
  • Gas adsorption
  • Pseudo order models
  • CO2
  • TiO2

Cite this

CO2 adsorption using TiO2 composite polymeric membranes : A kinetic study. / Hafeez, Sarah ; Fan, X; Hussain, Arshad; Martin, C F.

In: Journal of Environmental Sciences, Vol. 35, 01.09.2015, p. 163-171.

Research output: Contribution to journalArticle

Hafeez, Sarah ; Fan, X ; Hussain, Arshad ; Martin, C F. / CO2 adsorption using TiO2 composite polymeric membranes : A kinetic study. In: Journal of Environmental Sciences. 2015 ; Vol. 35. pp. 163-171.
@article{0ae566d3a1c148558536615cb0085368,
title = "CO2 adsorption using TiO2 composite polymeric membranes: A kinetic study",
abstract = "CO2 is the main greenhouse gas which causes global climatic changes on larger scale. Many techniques have been utilised to capture CO2. Membrane gas separation is a fast growing CO2 capture technique, particularly gas separation by composite membranes. The separation of CO2 by a membrane is not just a process to physically sieve out of CO2 through the controlled membrane pore size. It mainly depends upon diffusion and solubility of gases, particularly for composite dense membranes. The blended components in composite membranes have a high capability to adsorb CO2. The adsorption kinetics of the gases may directly affect diffusion and solubility. In this study, we have investigated the adsorption behaviour of CO2 in pure and composite membranes to explore the complete understanding of diffusion and solubility of CO2 through membranes. Pure cellulose acetate (CA) and cellulose acetate-titania nanoparticle (CA-TiO2) composite membranes were fabricated and characterised using SEM and FTIR analysis. The results indicated that the blended CA-TiO2 membrane adsorbed more quantity of CO2 gas as compared to pure CA membrane. The high CO2 adsorption capacity may enhance the diffusion and solubility of CO2 in the CA-TiO2 composite membrane, which results in a better CO2 separation. The experimental data was modelled by Pseudo first-order, pseudo second order and intra particle diffusion models. According to correlation factor R2, the Pseudo second order model was fitted well with experimental data. The intra particle diffusion model revealed that adsorption in dense membranes was not solely consisting of intra particle diffusion.",
keywords = "Global warming, Cellulose acetate , Gas adsorption, Pseudo order models, CO2, TiO2",
author = "Sarah Hafeez and X Fan and Arshad Hussain and Martin, {C F}",
note = "Acknowledgments This work was supported by Higher Education Commission (HEC) Pakistan. We also thank the Institute of Materials and Process University of Edinburgh UK, UK Royal Academy of Engineering, Royal Society of Edinburgh and School of Chemical and Materials Engineering, NUST, Islamabad, Pakistan.",
year = "2015",
month = "9",
day = "1",
doi = "10.1016/j.jes.2015.04.019",
language = "English",
volume = "35",
pages = "163--171",
journal = "Journal of Environmental Sciences",
issn = "1001-0742",
publisher = "Chinese Academy of Sciences",

}

TY - JOUR

T1 - CO2 adsorption using TiO2 composite polymeric membranes

T2 - A kinetic study

AU - Hafeez, Sarah

AU - Fan, X

AU - Hussain, Arshad

AU - Martin, C F

N1 - Acknowledgments This work was supported by Higher Education Commission (HEC) Pakistan. We also thank the Institute of Materials and Process University of Edinburgh UK, UK Royal Academy of Engineering, Royal Society of Edinburgh and School of Chemical and Materials Engineering, NUST, Islamabad, Pakistan.

PY - 2015/9/1

Y1 - 2015/9/1

N2 - CO2 is the main greenhouse gas which causes global climatic changes on larger scale. Many techniques have been utilised to capture CO2. Membrane gas separation is a fast growing CO2 capture technique, particularly gas separation by composite membranes. The separation of CO2 by a membrane is not just a process to physically sieve out of CO2 through the controlled membrane pore size. It mainly depends upon diffusion and solubility of gases, particularly for composite dense membranes. The blended components in composite membranes have a high capability to adsorb CO2. The adsorption kinetics of the gases may directly affect diffusion and solubility. In this study, we have investigated the adsorption behaviour of CO2 in pure and composite membranes to explore the complete understanding of diffusion and solubility of CO2 through membranes. Pure cellulose acetate (CA) and cellulose acetate-titania nanoparticle (CA-TiO2) composite membranes were fabricated and characterised using SEM and FTIR analysis. The results indicated that the blended CA-TiO2 membrane adsorbed more quantity of CO2 gas as compared to pure CA membrane. The high CO2 adsorption capacity may enhance the diffusion and solubility of CO2 in the CA-TiO2 composite membrane, which results in a better CO2 separation. The experimental data was modelled by Pseudo first-order, pseudo second order and intra particle diffusion models. According to correlation factor R2, the Pseudo second order model was fitted well with experimental data. The intra particle diffusion model revealed that adsorption in dense membranes was not solely consisting of intra particle diffusion.

AB - CO2 is the main greenhouse gas which causes global climatic changes on larger scale. Many techniques have been utilised to capture CO2. Membrane gas separation is a fast growing CO2 capture technique, particularly gas separation by composite membranes. The separation of CO2 by a membrane is not just a process to physically sieve out of CO2 through the controlled membrane pore size. It mainly depends upon diffusion and solubility of gases, particularly for composite dense membranes. The blended components in composite membranes have a high capability to adsorb CO2. The adsorption kinetics of the gases may directly affect diffusion and solubility. In this study, we have investigated the adsorption behaviour of CO2 in pure and composite membranes to explore the complete understanding of diffusion and solubility of CO2 through membranes. Pure cellulose acetate (CA) and cellulose acetate-titania nanoparticle (CA-TiO2) composite membranes were fabricated and characterised using SEM and FTIR analysis. The results indicated that the blended CA-TiO2 membrane adsorbed more quantity of CO2 gas as compared to pure CA membrane. The high CO2 adsorption capacity may enhance the diffusion and solubility of CO2 in the CA-TiO2 composite membrane, which results in a better CO2 separation. The experimental data was modelled by Pseudo first-order, pseudo second order and intra particle diffusion models. According to correlation factor R2, the Pseudo second order model was fitted well with experimental data. The intra particle diffusion model revealed that adsorption in dense membranes was not solely consisting of intra particle diffusion.

KW - Global warming

KW - Cellulose acetate

KW - Gas adsorption

KW - Pseudo order models

KW - CO2

KW - TiO2

U2 - 10.1016/j.jes.2015.04.019

DO - 10.1016/j.jes.2015.04.019

M3 - Article

VL - 35

SP - 163

EP - 171

JO - Journal of Environmental Sciences

JF - Journal of Environmental Sciences

SN - 1001-0742

ER -