FT-IR study of rockrose and of char and activated carbon

Autor: Vicente Gómez-Serrano, C. Valenzuela-Calahorro, A. Perez-Florindo, J. Pastor-Villegas, C.J. Durán-Valle
Rok vydání: 1996
Předmět:
Zdroj: Journal of Analytical and Applied Pyrolysis. 36:71-80
ISSN: 0165-2370
DOI: 10.1016/0165-2370(95)00921-3
Popis: Fourier transform-infrared spectroscopy was used in the study of rockrose (Cistus ladaniferus, L.) and of rockrose chars and activated carbons. Chars were prepared by heating the starting material between 200 and 1000 °C in nitrogen. Also, a sample was obtained at 600 °C in the atmosphere of the products of the thermal decomposition of rockrose. This charred product was used in the preparation of activated carbons. It was heated at 800 °C in air, CO2 or steam to 40% burn-off. The presence of oxygen groups and of olefinic and aromatic structures was detected in rockrose. The heat treatment of rockrose in the range 300–500 °C produced the most significant changes in the chemical structure of the material. Olefinic CC bonds and ether structures increased first in the chars and then the aromatic structure developed. Above 500 °C, the oxygen groups decreased with the temperature increase. The charring method of rockrose also influenced markedly the chemical structure of the chars. The use of a greater mass of sample slowed down the pyrolysis of rockrose. The activated carbons possessed aromatic CC bonds and oxygen groups.
Databáze: OpenAIRE
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