Publication
Selective hydrolysis of wheat straw hemicellulose using high-pressure CO2 as catalyst
| dc.contributor.author | Relvas, F. | |
| dc.contributor.author | Morais, Ana Rita C. | |
| dc.contributor.author | Lukasik, Rafal M. | |
| dc.date.accessioned | 2016-03-14T16:52:22Z | |
| dc.date.available | 2016-03-14T16:52:22Z | |
| dc.date.issued | 2015 | |
| dc.description.abstract | The processing of wheat straw using high-pressure CO2–H2O technology was studied with the objective to evaluate the effect of CO2 as catalyst on the hydrothermal production of hemicellulose-derived sugars either as oligomers or as monomers. Also, the reduction of the crystallinity of the cellulose-rich fraction was assessed. Over a range of reaction conditions (0 to 50 bar of initial CO2 pressure and 0 to 45 minutes of holding time, at T ¼ 180 C), the addition of CO2 to water-based processes led to the in situ formation of carbonic acid, which allowed us to obtain a higher dissolution of wheat straw hemicellulose. Furthermore, this approach led to a xylo-oligosaccharide (XOS) rich fraction, yielding 79.6 g of XOS per 100 g of the initial xylan content (at 50 bar of initial CO2 pressure and 12 min of residence time) while the water-only process gave only 70.8 g of XOS per 100 g of initial xylan content. Furthermore, for higher pressures of CO2, a decrease in oligosaccharide content was found and was counterbalanced by production of monomer sugars, achieving a maximum of 5.7 g L1 at the severest condition. | pt_PT |
| dc.identifier.citation | Relvas, F.; Morais, A.R.; Bogel-Lukasik, R. - Selective hydrolysis of wheat straw hemicellulose using high-pressure CO2 as catalyst. In: RSC Advances, 2015, Vol. 5, p. 73935-73944 | pt_PT |
| dc.identifier.doi | 10.1039/c5ra14632a | pt_PT |
| dc.identifier.issn | 2046-2069 | |
| dc.identifier.uri | http://hdl.handle.net/10400.9/2882 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | The Royal Society of Chemistry | pt_PT |
| dc.relation.publisherversion | http://dx.doi.org/10.1039/c5ra14632a | pt_PT |
| dc.subject | Hydrolysis | pt_PT |
| dc.subject | Lignocellulosic residues | pt_PT |
| dc.subject | Hemicellulose | pt_PT |
| dc.subject | Wheat Straw | pt_PT |
| dc.title | Selective hydrolysis of wheat straw hemicellulose using high-pressure CO2 as catalyst | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 73944 | pt_PT |
| oaire.citation.startPage | 73935 | pt_PT |
| oaire.citation.volume | 5 | pt_PT |
| person.familyName | Morais | |
| person.familyName | Lukasik | |
| person.givenName | Ana | |
| person.givenName | Rafal | |
| person.identifier.orcid | 0000-0002-3216-1533 | |
| person.identifier.orcid | 0000-0002-7805-5744 | |
| person.identifier.rid | J-9490-2013 | |
| person.identifier.rid | A-6315-2011 | |
| person.identifier.scopus-author-id | 6506737268 | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |
| relation.isAuthorOfPublication | 205ab6f0-709e-43f1-aa97-b01ebb62ac4e | |
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| relation.isAuthorOfPublication.latestForDiscovery | 6a7fdbd9-7961-407e-88d0-15d175ea711d |