Catalytic activity of cobalt and cerium catalysts supported on calcium hydroxyapatite in ethanol steam reforming

• Published in: Polish journal of chemical technology Vol. 18; no. 3; pp. 59 - 67
• Main Authors: Dobosz, Justyna, Hull, Sylwia, Zawadzki, Mirosław
• Format: Journal Article
• Language: English
• Published: De Gruyter Open 01.09.2016; Sciendo
• Subjects: cerium; cobalt; ethanol steam reforming; hydrogen production; hydroxyapatite
• ISSN: 1899-4741; 1899-4741
• DOI: 10.1515/pjct-2016-0049

In this paper, Co,Ce/Ca (PO (OH) catalysts with various cobalt loadings for steam reforming of ethanol (SRE) were prepared by microwave-assisted hydrothermal and sol-gel methods, and characterized by XRD, TEM, TPR-H , N adsorption-desorption measurements and cyclohexanol (CHOL) decomposition tests. High ethanol conversion (close to 100%) was obtained for the catalysts prepared by both methods but these ones prepared under hydrothermal conditions (HAp-H) ensured higher hydrogen yield (3.49 mol H /mol C OH) as well as higher amount of hydrogen formed (up to 70%) under reaction conditions. The superior performance of 5Co,10Ce/HAp-H catalyst is thought to be due to a combination of factors, including increased reducibility and oxygen mobility, higher density of basic sites on its surface, and improved textural properties. The results also show a significant effect of cobalt loading on catalysts efficiency in hydrogen production: the higher H yield exhibit catalysts with lower cobalt content, regardless of the used synthesis method.