Journal
BIORESOURCE TECHNOLOGY
Volume 151, Issue -, Pages 207-213Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.10.046
Keywords
Crab shell; Eggshell; Calcium oxide; Biodiesel
Funding
- Fundacao Cearense de Apoio ao Desenvolvimento Cientifico e Tecnologico (FUNCAP)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) - DGU [216/12]
- Bioinorganic Laboratory (UFC-Chemical)
- X-rays Laboratory (UFC-Physical)
- Polymer Laboratory (LAPOL-UFC-Chemical)
- Core Technology of the State of Ceara (NUTEC)
- Universidad de Malaga (UMA)
- Ministerio de Economia y Competitividad [CTQ2012-37925-C03-03]
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The catalytic activities of calcium oxide obtained from natural sources (crab shell and eggshell) were characterized and evaluated in the transesterification of vegetable oil. These catalysts are mainly composed of calcium carbonate, which is partially converted into CaO after calcination (900 degrees C for 2 h). The catalysts have some advantages, such as abundant occurrence, low cost, porous structure, and nontoxic. The materials were characterized by XRD, FTIR, TG/DTG, CO2-TPD, XPS, SEM, and BET methods. The thermal treatment produces small particles of CaCO3 and CaO that are responsible for the catalytic activity. The conversion from triglycerides to methyl ester was not observed in transesterification carried out using natural crab shell and eggshell. Under optimized reaction conditions, the conversions to Y-FAME using the calcined catalysts were: crab shell (83.10 +/- 0.27 wt.%) and eggshell (97.75 +/- 0.02 wt.%). These results, showed that these materials have promising viability in transesterification for biodiesel production. (C) 2013 Elsevier Ltd. All rights reserved.
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