Osatiashtiani, A;
Puértolas, B;
Oliveira, CCS;
Manayil, JC;
Barbero, B;
Isaacs, M;
Michailof, C;
... Wilson, K; + view all
(2017)
On the influence of Si:Al ratio and hierarchical porosity of FAU zeolites in solid acid catalysed esterification pretreatment of bio-oil.
Biomass Conversion and Biorefinery
, 7
(3)
pp. 331-342.
10.1007/s13399-017-0254-x.
Preview |
Text (Published article)
Osatiashtiani2017_Article_OnTheInfluenceOfSiAlRatioAndHi.pdf - Published Version Download (1MB) | Preview |
Preview |
Text (Supplementary information)
13399_2017_254_MOESM1_ESM.pdf Download (928kB) | Preview |
Abstract
A family of faujasite (FAU) zeolites with different Si:Al ratio, and/or hierarchical porosity introduced via post-synthetic alkaline desilication treatment, have been evaluated as solid acid catalysts for esterification pretreatments of pyrolysis bio-oil components. Acetic acid esterification with aliphatic and aromatic alcohols including methanol, anisyl alcohol, benzyl alcohol, p-cresol and n-butanol was first selected as a model reaction to identify the optimum zeolite properties. Materials were fully characterised using N2porosimetry, ICP, XRD, XPS, FT-IR, pyridine adsorption, NH3TPD, In-situ ATR and inverse gas chromatography (IGC). IGC demonstrates that the surface polarity and hence hydrophobicity of FAU decreases with increased Si:Al ratio. Despite possessing a higher acid site loading and acetic acid adsorption capacity, high Al-content FAU possess weaker acidity than more siliceous catalysts. Esterification activity increases with acid strength and decreasing surface polarity following the order FAU30>FAU6>FAU2.6. The introduction of mesoporosity through synthesis of a hierarchical HFAU30 material further enhances esterification activity through improved acid site accessibility and hydrophobicity. Methanol was the most reactive alcohol for esterification, and evaluated with HFAU30 for the pretreatment of a real pyrolysis bio-oil, reducing the acid content by 76% under mild conditions.
| Type: | Article |
|---|---|
| Title: | On the influence of Si:Al ratio and hierarchical porosity of FAU zeolites in solid acid catalysed esterification pretreatment of bio-oil |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1007/s13399-017-0254-x |
| Publisher version: | https://doi.org/10.1007/s13399-017-0254-x |
| Language: | English |
| Additional information: | Open Access: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
| Keywords: | Esterification, Bio-oil, Pyrolysis, Heterogeneous catalysis |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10053358 |
Archive Staff Only
 |
View Item |
