Chemisorption of air CO2 on cellulose: an overlooked feature of the cellulose/NaOH(aq) dissolution system
Artikel i vetenskaplig tidskrift, 2017

A natural abundance of the air CO2 in NaOH(aq) at low temperature was investigated in terms of cellulose-CO2 interactions upon cellulose dissolution in this system. An organic superbase, namely 1,8-diazabicyclo[5.4.0]undec-7-ene, DBU, known for its ability to incorporate CO2 in carbohydrates, was employed in order to shed light on this previously overlooked feature of NaOH(aq) at low temperature. The chemisorption of CO2 onto cellulose was investigated using spectroscopic methods in combination with suitable regeneration procedures. ATR-IR and NMR characterisation of regenerated celluloses showed that chemisorption of CO2 onto cellulose during its dissolution in NaOH(aq) takes place both with and without employment of the CO2-capturing superbase. The chemisorption was also observed to be reversible upon addition of water: CO2 desorbed when water was used as regenerating agent but could be preserved when instead ethanol was used. This finding could be an important parameter to take into consideration when developing processes for dissolution of cellulose based on this system.

NaOH(aq)

Cellulose

NMR

Chemisorption

ATR-IR

DBU

CO2

Dissolution

Författare

Maria Gunnarsson

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

Hans Theliander

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

Wallenberg Wood Science Center (WWSC)

Merima Hasani

Chalmers, Kemi och kemiteknik, Kemiteknik, Skogsindustriell kemiteknik

Wallenberg Wood Science Center (WWSC)

Cellulose

0969-0239 (ISSN)

Vol. 24 6 2427-2436

Drivkrafter

Hållbar utveckling

Styrkeområden

Building Futures

Ämneskategorier

Annan kemi

DOI

10.1007/s10570-017-1288-8

Mer information

Senast uppdaterat

2018-08-27