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Aminopropyl-functionalised silicas as high capacity CO2 adsorbents

conference contribution
posted on 2004-01-01, 00:00 authored by G P Knowles, J V Graham, Seamus DelaneySeamus Delaney, A L Chaffee
Tether loadings and CO2 adsorption capacities are typically reported on a mass or volume basis. However, to understand molecular level phenomena at the gas-solid interface, it is helpful to compare capacities on a surface area basis. Tether loadings and CO2 adsorption capacities were determined to substrates of varied morphology and levels of hydration. Materials prepared from high surface area HMS gave higher N contents and CO2 adsorption capacities per unit mass, yet lower loadings per square nanometer relative to materials prepared from the lower surface area silica gel 40. Longer reaction times led to improved capacities on a unit surface area basis. However, reducing the level of hydration or the average pore diameter of the substrate (within the range examined) did not affect loading capacity.

History

Event

American Chemical Society. Meeting (2004 : 228th : Philadelphia, Pennsylvania)

Volume

227

Issue

1

Publisher

American Chemical Society

Location

Philadelphia, Pennsylvania

Start date

2004-08-22

End date

2004-08-26

ISSN

0065-7727

Language

eng

Publication classification

EN.1 Other conference paper

Title of proceedings

ACS National Meeting Book of Abstracts

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