Journal
CHEMCATCHEM
Volume 9, Issue 12, Pages 2250-2261Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201601480
Keywords
acidity; alcohols; basicity; Guerbet; strontium; hydroxyapatite; ethanol; butanol
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Funding
- European Union [241718]
- Fonds Europeen de Developpement Regional (FEDER)
- CNRS
- Region Nord Pas-de-Calais
- Ministere de l'Education Nationale de l'Enseignement Superieur et de la Recherche
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The Guerbet reaction of ethanol to heavier products was performed over a series of extensively characterized Sr-substituted hydroxyapatites (HAPs) with different (Ca+Sr)/P ratios, and thus different structural, textural, and acid-base properties. The acid-base properties were correlated with the reactivity of the solids and an optimal ratio between the amount of acid and basic sites was determined (ca. 4), whereas the ethanol conversion was mainly depending on the specific surface area of the solids. The stoichiometric 100 mol% Sr-substituted sample (SrAp-100) was especially efficient in higher alcohols production, which can be illustrated by a total alcohol selectivity (76.4%) higher than that of all the other solids at a 13% ethanol isoconversion.
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