Author/Authors :
M. Heidari Department of Chemical Engineering - Tarbiat Modares University, Tehran, Iran , S. S. Hosseini Department of Chemical Engineering - Tarbiat Modares University, Tehran, Iran , M. R. Omidkhah Department of Chemical Engineering - Tarbiat Modares University, Tehran, Iran , M. Razzaghi Kashani Department of Chemical Engineering - Tarbiat Modares University, Tehran, Iran , S. A. Ghadimi Department of Petrochemicals Synthesis - Iran Polymer and Petrochemical Institute, Tehran, Iran
كليدواژه :
Carbon nanoparticle , Gas separation , Phenolic resin , Adsorption equilibrium , Kinetics
چكيده لاتين :
Adsorptive-carbon nanoparticles are synthesized through pyrolysis of phenolic resin precursor up to final temperature of 700 °C and being ball-milled into fine particles. Effect of operating temperature on sorption and diffusion coefficients of carbon dioxide and methane gases are examined over the temperature range from 5 to 45°C. Adsorption isotherms are fitted with the Langmuir model and kinetic uptake rate measurement are used for determination of diffusion coefficients. Long-time solution of Fick’s law for a spherical particle is applied for interpretation of uptake experiments. Heat of sorption and activation energy of diffusion as well as solubility and diffusivity selectivity are reported. With increasing temperature a decrease in sorption and increase in diffusion coefficiens occur. SEM micrograph of carbon nanoparticle indicate that average carbon particle size is about 60 nanometer but particles tends to agglomerate. The analysis of the obtained results from uptake study revealed that agglomeration of nanoparticles and formation of particles with bigger radius limited the application of uptake rate measurement for driving diffusion coefficients.
