ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Single Coal Char Particle Combustion in the Carbon Dioxide Atmosphere

R. Žajdlík, J. Markoš, Ľ. Jelemenský, and B. Remiarová

Department of Chemical and Biochemical Engineering, Faculty of Chemical Technology, Slovak University of Technology, SK-812 37 Bratislava

E-mail: markos@cvt.stuba.sk

Received: 19 May 2000

Abstract: The combustion of single coal char particle in carbon dioxide atmosphere was studied. In experiments, brown coal from coal mine Cígeľ (Slovakia) has been used. The combustion was monitored using the TGA method. The experimental equipment allowed to study the mass of the particle and temperatures inside of the particle and on its geometrical surface. Time dependences of these parameters were measured during combustion in different gas mixtures of carbon dioxide and argon (5—100 vol. % of CO₂) and in the temperature range 800—1300ºC. For some samples, the properties such as pore size distribution, specific surface area, and porosity were determined by the mercury porosimetry and the nitrogen sorption method. The results showed that coal char particle combustion proceeded via a homogeneous mechanism. The microstructure properties of a partially combusted particle showed an important increase in the specific surface area compared to the original coal char particle, which was mainly formed by micropores. Such partially combusted particle can be used as a cheep adsorbent.

Full paper in Portable Document Format: 546ba467.pdf

Chemical Papers 54 (6b) 467–472 (2000)