Silica-supported guanidine catalyst for continuous flow biodiesel production

Balbino, João Marcio; Menezes, Eliana Weber de; Benvenutti, Edílson V.; Cataluña, Renato; Ebeling, Günter; Dupont, Jaı̈rton

doi:10.1039/c1gc15727b

Cited by 41 publications

(16 citation statements)

References 35 publications

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“…Secondly, a series of organic bases have been investigated for this conversion, and the results are shown in Table 1. The results demonstrate that DBU is the best catalyst (95.2 % yield, Table 1, entry 1), while only 90.0 % and 86.6 % of yield were obtained when 1,1,3,3‐tetramethylguanidine12c, 15 (entry 2), and 1,5,7‐triazabicyclo[4.4.0]dec‐5‐ene (entry 3) were used as a catalyst, respectively. After analysis triethylamine and triethylenediamine were shown to be not ideal catalysts for the transesterification of triglyceride, as only very low yields of FAMES were achieved under identical conditions (Table 1, entry 4, 5).…”

Section: Resultsmentioning

confidence: 99%

Phase‐switching Homogeneous Catalysis for Clean Production of Biodiesel and Glycerol from Soybean and Microbial Lipids

Cao

Xie

et al. 2012

ChemCatChem

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Section: Resultsmentioning

confidence: 99%

Phase‐switching Homogeneous Catalysis for Clean Production of Biodiesel and Glycerol from Soybean and Microbial Lipids

Cao

Xie

et al. 2012

ChemCatChem

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“…The activation energy (Ea) and pre‐exponential factor (A) for the same reaction have been calculated by following the Arrhenius model as given in equation .

\ln normalk = - E_{a} / italicRT + \ln A,

…”

Section: Resultsmentioning

confidence: 99%

One‐pot solvent‐free transformation of natural triglycerides to ester and amide derivatives over CaO@KC nanostructured catalysts

2020

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Summary In the present report, the fatty acid alkyl esters and fatty acid amides were synthesized from natural triglycerides by highly selective solvent‐free one‐step methods using 3.5‐CaO@KC‐400 nanocrystals as a heterogeneous catalyst. A modified wetness chemical impregnation method was used to prepared potassium carbonate‐doped CaO, ZnO, and MgO nanocrystals. The prepared 3.5‐CaO@KC‐400 nanocrystals were found as the most efficient heterogeneous catalyst (5%, w/w) for amidation (6:1 M ratio of diethanolamine/oil, 110°C) and transesterification (12:1 M ratio of methanol/oil, 65°C) of waste cooking oil and took 30 minutes for the completion of both the reactions. The 3.5‐CaO@KC‐400 nanocrystals were found to be efficient at room temperature also and reused for 10 reaction cycles for both reactions. The pseudo‐first‐order kinetic model was applied and the first‐order rate constant was calculated as 0.15 minute−1 and 0.103 minute−1 for the amidation and transesterification reactions of waste cooking oil, respectively.

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“…Conversions up to 98 % were obtained for soybean oil methanolysis at 353 K for 3 h. This catalytic system was transposed to a semi-pilot scale in a continuous-flow reactor and resulted in 44 % conversion. The calculated activation energy of the methanolysis in this continuous system indicated that the reaction is probably under mass-transfer limitations [37].…”

Section: Catalysismentioning

confidence: 89%