Jump to main content
Jump to site search


The CO2 capturing ability of cellulose dissolved in NaOH(aq) at low temperature

Abstract

Herein, we explore the intrinsic ability of cellulose dissolved in NaOH(aq) to reversibly capture CO2. The stability of cellulose solutions differed significantly when adding CO2 prior or after the dissolution of cellulose. ATR-IR spectroscopy on cellulose regenerated from the solutions, using ethanol, revealed the formation of a new carbonate species, likely to be cellulose carbonate. To elucidate the interaction of cellulose with CO2 on a molecular level, 13C NMR was recorded on methyl α-D-glucopyranoside (MeO-Glcp), a model compound, dissolved in NaOH(aq), which showed a difference in chemical shift when CO2 was added prior or after dissolution of MeO-Glcp, this without a change in pH. The uptake of CO2 was found to be more than twice as high when CO2 was added to a solution after the dissolution of MeO-Glcp. Taken together, a mechanism for the observed CO2 capture is proposed, involving the formation of an intermediate cellulose carbonate upon reaction of a cellulose alkoxide with CO2. The intermediate was observed as a captured carbonate structure only in regenerated samples, while its corresponding NMR peak in solution was absent. The reason for this is plausibly a rather fast hydrolysis of the carbonate intermediate by water, leading to the formation of CO32-, and thus increased capture of CO2. The potential of using carbohydrates as CO2 capturing agents in NaOH(aq) is shown to be simple and resource effective in terms of capturing and regeneration of the CO2.

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Apr 2018, accepted on 13 Jun 2018 and first published on 14 Jun 2018


Article type: Paper
DOI: 10.1039/C8GC01092G
Citation: Green Chem., 2018, Accepted Manuscript
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    The CO2 capturing ability of cellulose dissolved in NaOH(aq) at low temperature

    M. Gunnarsson, D. Bernin, Å. Östlund and M. Hasani, Green Chem., 2018, Accepted Manuscript , DOI: 10.1039/C8GC01092G

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements