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Catalysts derived from waste sources in the production of biodiesel using waste cooking oil

Paper ID Volume ID Publish Year Pages File Format Full-Text
55242 47044 2012 5 PDF Available
Title
Catalysts derived from waste sources in the production of biodiesel using waste cooking oil
Abstract

Catalysts fully derived from waste materials in order to make sustainable chemical reactions have been a recent topic of interest. Calcined (900 °C, 2 h) calcium oxide (CaO) sourced from waste mud crab shells and cockleshells were mixed in a 1:1 mass ratio to be used for transesterification of waste cooking oil (WCO) at 5 wt.% catalyst and a methanol to oil molar ratio of 13:1 for 3 h at methanol refluxing temperature to give 98% conversion. Then, boiler ash (BA) from agricultural waste was used to transesterify WCO at 3 wt.% catalyst and a methanol to oil molar ratio of 15:1 for 0.5 h at methanol refluxing temperature to give 89% conversion. In order to reduce the reaction time (for CaO-catalyzed reaction) and to increase the conversion (for BA-catalyzed reaction) various amounts of BA were added to 5 wt.% of mixed CaO and optimized using Central Composite Design (CCD). The optimized conditions predicted by CCD were found to be 3.39 wt.% boiler ash, with a reaction time of 32.3 min and a conversion of 99.5%. The predicted results agree with the experimental results (3 wt.% boiler ash, reaction time of 30 min with 99% conversion).

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (208 K)Download as PowerPoint slideHighlights► Mixed CaO (mud crab and cockle shells 1:1 mass ratio) gives 98% methyl esters conversion at 5 wt.% catalyst concentration; 13:1 methanol to oil molar ratio and 3 h reaction time. ► Boiler ash gives 89% methyl esters conversion at 3 wt.% catalyst concentration; 15:1 methanol to oil molar ratio and 0.5 h reaction time. ► Mixture of 3 wt.% boiler ash and 5 wt.% mixed CaO gives 99% conversion in 0.5 h at 15:1 methanol:oil molar ratio. ► The conditions were optimized using Central Composite Design (CCD).

Keywords
Mud crab shell; Cockleshell; Boiler ash; Transesterification; Waste cooking oil
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Catalysts derived from waste sources in the production of biodiesel using waste cooking oil
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 190, Issue 1, 1 August 2012, Pages 117–121
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us