Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich.
mehr Informationen...
Production of biodiesel from Jatropha curcas L. oil
Ist Teil von
Computers & chemical engineering, 2009-05, Vol.33 (5), p.1091-1096
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2009
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A two-step process consisting of pre-esterification and transesterification was developed to produce biodiesel from crude
Jatropha curcas L. oil. The free fatty acids (FFAs) in the oil were converted to methyl esters in the pre-esterification step using sulfuric acid or solid acid prepared by calcining metatitanic acid as catalysts. The acid value of oil was reduced from the initial 14
mg-KOH/g-oil to below 1.0
mg-KOH/g-oil in 2
h under the conditions of 12
wt% methanol, 1
wt% H
2SO
4 in oil at 70
°C. The conversion of FFAs was higher than 97% at 90
°C in 2
h using 4
wt% solid acid and a molar ratio of methanol to FFAs of 20:1. Phospholipid compounds were eliminated during pre-esterification and a separate degumming operation was unnecessary. The yield of biodiesel by transesterification was higher than 98% in 20
min using 1.3% KOH as catalyst and a molar ratio of methanol to oil 6:1 at 64
°C.