Structural and Textural Properties of Pyrolytic Carbon Formed within a Microporous Zeolite Template

Autor:	Ljubisa Radovic, Tomas Cordero Alcántara, Juan José Rodríguez Jiménez, Jose Rodriguez-Mirasol, Saken Abdimomyn
Rok vydání:	1998
Předmět:	Thermogravimetric analysis Materials science General Chemical Engineering chemistry.chemical_element General Chemistry Microporous material Molecular sieve Adsorption chemistry Chemical engineering Materials Chemistry Organic chemistry Pyrolytic carbon Zeolite Pyrolysis Carbon
Zdroj:	Chemistry of Materials. 10:550-558
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm970552p
Popis:	A new class of pyrolytic carbon materials has been prepared by chemical vapor infiltration of a microporous zeolite powder followed by removal of the zeolitic substrate. A wide-pore Y zeolite was used as the substrate for the pyrolytic carbon, and propylene was used as the carbon precursor. The structure and porous texture of the resulting carbons were examined by X-ray diffraction, scanning and transmission electron microscopy, and by adsorption of N2 at 77 K and CO2 at 273 K. Carbon reactivity studies were performed by both nonisothermal and isothermal thermogravimetric analysis. Under the present conditions of chemical vapor infiltration (800−850 °C, 2.5 vol % C3H6, 1 atm of N2), high-surface-area microporous carbons, with wide microporosity, well-developed mesoporosity and high adsorption capacity were obtained. The carbon yield and the apparent surface area of the carbon increased with increasing propylene pyrolysis temperature. The morphology of the carbons was very similar to that of the zeolite te...
Databáze:	OpenAIRE
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