Publikationsdatum:
2012-11-09
Beschreibung:
In this work, the esterification of oleic acid (OA) with methanol (MOH) using layered heterogeneous catalysts under various reaction conditions to produce biodiesel was studied. The zinc hydroxy nitrate salt Zn 5 (OH) 8 (NO 3 ) 2 · 2H 2 O (abbreviated Zn-N) and zinc hydroxy acetate Zn 5 (OH) 8 (CH 3 COO) 2 · 4H 2 O (abbreviated Zn-A), which have a layered structure, were synthesized (chemical precipitation) and characterized. Tests for the selection of reaction conditions that maximize the yield to methyl esters were performed. The variables considered were temperature, OA:MOH molar ratio and catalyst loading, selecting the study intervals within the range of feasible operating conditions for the catalysts. The layered solid Zn-A was seen to be more active than Zn-N for the esterification of OA. When working at 140°C, 1:30 OA:MOH molar ratio and catalyst loading of 3% w/w, conversions of 87.0 and 73.4% were obtained for Zn-A and Zn-N, respectively.
Print ISSN:
1748-1317
Digitale ISSN:
1748-1325
Thema:
Energietechnik
,
Maschinenbau
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