Please use this identifier to cite or link to this item:
https://doi.org/10.1016/j.jaap.2013.07.010
DC Field | Value | |
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dc.title | Influence of selected mineral acids and alkalis on cellulose pyrolysis pathways and anhydrosaccharide formation | |
dc.contributor.author | Shaik, S.M. | |
dc.contributor.author | Sharratt, P.N. | |
dc.contributor.author | Tan, R.B.H. | |
dc.date.accessioned | 2014-10-09T06:51:26Z | |
dc.date.available | 2014-10-09T06:51:26Z | |
dc.date.issued | 2013-11 | |
dc.identifier.citation | Shaik, S.M., Sharratt, P.N., Tan, R.B.H. (2013-11). Influence of selected mineral acids and alkalis on cellulose pyrolysis pathways and anhydrosaccharide formation. Journal of Analytical and Applied Pyrolysis 104 : 234-242. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jaap.2013.07.010 | |
dc.identifier.issn | 01652370 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/89232 | |
dc.description.abstract | The primary/initial thermal degradation pathway is via intermolecular transglycosylation reactions within the glucose monomers of cellulose. Formation of liquid tar from cellulose can also occur via β-elimination. Under this mechanism, volatile acids (e.g. carboxylic acids) formed from the initial cellulose decomposition are able to attack the remaining cellulose as Bronsted acids thus catalysing heterolytic (ring-opening) reactions. Here, we have studied the effects of acids (H2SO4, H3PO 4, H3BO3) and alkalis (Ca(OH)2, NH4OH) on the yields of levoglucosan and its derivatives (levoglucosenone, 1,4:3,6-dianhydro-α-d-glucopyranose, 1,6-anhydro-β-d-glucofuranose). It was found that the acids generally decreased the total amount of anhydrosaccharides whilst cellulose infused with the alkalis had increased anhydrosaccharide yields. The results indicate that the β-elimination pathway was catalysed by the presence of acidic species (e.g. H+ ions). The extent of cellulose conversion via the β-elimination pathway was dependant on the amount and strength of acid infused within the cellulose matrix. However, the β-elimination route could also be suppressed or controlled by the introduction of a neutralising species (e.g. OH- ions). © 2013 Elsevier B.V. All rights reserved. | |
dc.description.uri | http://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.jaap.2013.07.010 | |
dc.source | Scopus | |
dc.subject | Biomass | |
dc.subject | Cellulose | |
dc.subject | Levoglucosan | |
dc.subject | Levoglucosenone | |
dc.subject | Pyrolysis | |
dc.subject | Transglycosylation | |
dc.type | Article | |
dc.contributor.department | CHEMICAL & BIOMOLECULAR ENGINEERING | |
dc.description.doi | 10.1016/j.jaap.2013.07.010 | |
dc.description.sourcetitle | Journal of Analytical and Applied Pyrolysis | |
dc.description.volume | 104 | |
dc.description.page | 234-242 | |
dc.description.coden | JAAPD | |
dc.identifier.isiut | 000327904300029 | |
Appears in Collections: | Staff Publications |
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