Formulation, adsorption performance, and mechanical integrity of triamine grafted binder-based mesoporous silica pellets for CO2 capture

Abstract

This work explored the formation of mesoporous silicas pellets using a range of bentonite and colloidal silica (LUDOX) fractions, aiming to optimise the binder composition that minimises any deteriorating effects on adsorption performance, while providing adequate mechanical integrity. Thermogravimetric analysis, scanning electron microscopy, and dynamic mechanical analysis were used to structurally characterise the pellets. Further, CO 2 adsorption isotherms of synthesised pellets, pre and post triamine grafting, were measured. Bentonite was found to be an effective single binder that forms mechanically strong pellets and retains up to 85% of CO 2 capacity of the base adsorbent. In the presence of LUDOX, pellet hardness was lower, and led to the largest decrease in CO 2 capacity. Formulation with 25% bentonite was found to provide pellets with post triamine functionalisation CO 2 capacity equivalent to powder SBA-15, at an amine efficiency of 0.41 mol CO 2/mol, while minimising pore blockage and maintaining a compressive strength of 1.5 MPa.

Publication DOI: https://doi.org/10.1016/j.powtec.2021.07.033
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences
Additional Information: © 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: Adsorption,Amine grafting,Bentonite binder,Carbon capture,Pellet formation,SBA-15,Chemical Engineering(all)
Full Text Link:
Related URLs: https://linking ... 032591021006173 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-11
Published Online Date: 2021-07-16
Accepted Date: 2021-07-13
Authors: Wadi, Basil
Mahomed, Anisa (ORCID Profile 0000-0002-3719-7543)
Bai, Yang
Osatiashtiani, Amin (ORCID Profile 0000-0003-1334-127X)
Manovic, Vasilije
Nabavi, Seyed Ali

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Version: Accepted Version

Access Restriction: Restricted to Repository staff only until 16 July 2022.

License: Creative Commons Attribution Non-commercial No Derivatives


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