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Biodiesel from Citrullus colocynthis oil: sulfonic-ionic liquid-catalyzed esterification of a two-step process.

Ali Elsheikh Y, Hassan Akhtar F - ScientificWorldJournal (2014)

Bottom Line: Based on the results, 3.6 wt% of DSIMHSO4, methanol/CCO molar ratio of 12 : 1, and 150 °C offered a final FFA conversion of 95.4% within 105 min.A 98.2% was produced via second KOH-catalyzed step in 1.0%, 6 : 1 molar ratio, 600 rpm, and 60 °C for 50 min.This new two-step catalyzed process could solve the corrosion and environmental problems associated with the current acidic catalysts.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical and Materials Engineering, King Abdulaziz University, P.O. Box 344, Rabigh, Saudi Arabia.

ABSTRACT
Biodiesel was prepared from Citrullus colocynthis oil (CCO) via a two-step process. The first esterification step was explored in two ionic liquids (ILs) with 1,3-disulfonic acid imidazolium hydrogen sulfate (DSIMHSO4) and 3-methyl-1-sulfonic acid imidazolium hydrogen sulfate (MSIMHSO4). Both ILs appeared to be good candidates to replace hazardous acidic catalyst due to their exceptional properties. However, the two sulfonic chains existing in DSIMHSO4 were found to increase the acidity to the IL than the single sulfonic chain in MSIMHSO4. Based on the results, 3.6 wt% of DSIMHSO4, methanol/CCO molar ratio of 12 : 1, and 150 °C offered a final FFA conversion of 95.4% within 105 min. A 98.2% was produced via second KOH-catalyzed step in 1.0%, 6 : 1 molar ratio, 600 rpm, and 60 °C for 50 min. This new two-step catalyzed process could solve the corrosion and environmental problems associated with the current acidic catalysts.

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Related in: MedlinePlus

Conversion of FFA versus reaction time. The reaction conditions were 12 : 1 methanol/CCO molar ratio, 3.6 wt% DSIMHSO4, 150°C, and 600 rpm.
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fig11: Conversion of FFA versus reaction time. The reaction conditions were 12 : 1 methanol/CCO molar ratio, 3.6 wt% DSIMHSO4, 150°C, and 600 rpm.

Mentions: The results are displayed in Figure 11 and showed the variation of optimal parameters versus time. In this part, to establish the effect of reaction time on FFA conversion, experiments were carried out at different times ranging from 30 to 180 min in the presence of 3.6 wt% DSIMHSO4 catalyst at a reaction temperature 150°C, methanol/CCO molar ratio of 12 : 1, and agitation rate of 600 rpm.


Biodiesel from Citrullus colocynthis oil: sulfonic-ionic liquid-catalyzed esterification of a two-step process.

Ali Elsheikh Y, Hassan Akhtar F - ScientificWorldJournal (2014)

Conversion of FFA versus reaction time. The reaction conditions were 12 : 1 methanol/CCO molar ratio, 3.6 wt% DSIMHSO4, 150°C, and 600 rpm.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4060741&req=5

fig11: Conversion of FFA versus reaction time. The reaction conditions were 12 : 1 methanol/CCO molar ratio, 3.6 wt% DSIMHSO4, 150°C, and 600 rpm.
Mentions: The results are displayed in Figure 11 and showed the variation of optimal parameters versus time. In this part, to establish the effect of reaction time on FFA conversion, experiments were carried out at different times ranging from 30 to 180 min in the presence of 3.6 wt% DSIMHSO4 catalyst at a reaction temperature 150°C, methanol/CCO molar ratio of 12 : 1, and agitation rate of 600 rpm.

Bottom Line: Based on the results, 3.6 wt% of DSIMHSO4, methanol/CCO molar ratio of 12 : 1, and 150 °C offered a final FFA conversion of 95.4% within 105 min.A 98.2% was produced via second KOH-catalyzed step in 1.0%, 6 : 1 molar ratio, 600 rpm, and 60 °C for 50 min.This new two-step catalyzed process could solve the corrosion and environmental problems associated with the current acidic catalysts.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical and Materials Engineering, King Abdulaziz University, P.O. Box 344, Rabigh, Saudi Arabia.

ABSTRACT
Biodiesel was prepared from Citrullus colocynthis oil (CCO) via a two-step process. The first esterification step was explored in two ionic liquids (ILs) with 1,3-disulfonic acid imidazolium hydrogen sulfate (DSIMHSO4) and 3-methyl-1-sulfonic acid imidazolium hydrogen sulfate (MSIMHSO4). Both ILs appeared to be good candidates to replace hazardous acidic catalyst due to their exceptional properties. However, the two sulfonic chains existing in DSIMHSO4 were found to increase the acidity to the IL than the single sulfonic chain in MSIMHSO4. Based on the results, 3.6 wt% of DSIMHSO4, methanol/CCO molar ratio of 12 : 1, and 150 °C offered a final FFA conversion of 95.4% within 105 min. A 98.2% was produced via second KOH-catalyzed step in 1.0%, 6 : 1 molar ratio, 600 rpm, and 60 °C for 50 min. This new two-step catalyzed process could solve the corrosion and environmental problems associated with the current acidic catalysts.

Show MeSH
Related in: MedlinePlus