Publication
Oxygenated biofuels from butanol for diesel blends: synthesis of the acetal 1,1-dibutoxyethane catalyzed by amberlyst-15 Ion-exchange resin
| dc.contributor.author | Graça, Nuno S. | |
| dc.contributor.author | Pais, Luís S. | |
| dc.contributor.author | Silva, Viviana M.T.M. | |
| dc.contributor.author | Rodrigues, Alírio | |
| dc.date.accessioned | 2011-05-31T11:53:19Z | |
| dc.date.available | 2011-05-31T11:53:19Z | |
| dc.date.issued | 2010 | |
| dc.description.abstract | The synthesis of 1,1-dibutoxyethane or acetaldehyde dibutylacetal was studied in a batch reactor by reacting butanol and acetaldehyde in a liquid phase, using Amberlyst-15 as the catalyst. The reaction equilibrium constant was experimentally determined in the temperature range 20-40 °C at 6 atm, where Ka = 0.00959 exp[1755.3/T (K)]. The standard properties of the reaction at 298.15 K were estimated: ΔH° = -14.59 kJ mol-1, ΔG° = -3.07 kJ mol-1, and ΔS° = -38.64 J mol-1 K-1. Kinetic experiments were performed in the temperature range 10-50 °C at 6 atm. A two-parameter kinetic law based on a Langmuir-Hinshelwood rate expression, using activity coefficients from the UNIFAC method, was used. The kinetic parameters are kc = 2.39 E9 exp[-6200.9/T (K)] (mol gcat -1 min-1) and ks,D = 2.25 E-4 exp[3303.1/T (K)]. The activation energy of the reaction is 51.55 kJ mol-1. This work is an important step for further implementation of an integrated reaction-separation process, such as a simulated moving-bed reactor. | por |
| dc.identifier.citation | Graça, N.S.; Pais, L.S.; Silva, V.M.T.M.; Rodrigues, A.E. (2010). Oxygenated biofuels from butanol for diesel blends: synthesis of the acetal 1,1-dibutoxyethane catalyzed by amberlyst-15 Ion-exchange resin. Industrial Engineering Chemistry Research. ISSN 0888-5885. 49, p. 6763-6771. | por |
| dc.identifier.doi | 10.1021/ie901635j | |
| dc.identifier.eissn | 1520-5045 | |
| dc.identifier.issn | 0888-5885 | |
| dc.identifier.uri | http://hdl.handle.net/10198/4779 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.subject | Biofuels | por |
| dc.subject | Acetal 1,1-dibutoxyethane | por |
| dc.subject | Simulated moving bed reactor | por |
| dc.title | Oxygenated biofuels from butanol for diesel blends: synthesis of the acetal 1,1-dibutoxyethane catalyzed by amberlyst-15 Ion-exchange resin | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 6771 | por |
| oaire.citation.startPage | 6763 | por |
| oaire.citation.title | Industrial and Engineering Chemistry Research | por |
| person.familyName | Pais | |
| person.givenName | Luís S. | |
| person.identifier.ciencia-id | 421E-0CCD-A84F | |
| person.identifier.orcid | 0000-0002-3000-2862 | |
| person.identifier.scopus-author-id | 6603930478 | |
| rcaap.rights | openAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | c6d25534-8487-45b1-90af-d350f4e3ac55 | |
| relation.isAuthorOfPublication.latestForDiscovery | c6d25534-8487-45b1-90af-d350f4e3ac55 |