Authors: Nisar J., Khan M.S., Ali G., Shah A., Khan R.A., Shah F., Sirajuddin, Sherazi S.T.H., Iqbal M.
Author Affiliations: Nisar, J., National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan; Khan, M.S., National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan; Ali, G., National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar, 25120, Pakistan; Shah, A., Department of Chemistry, College of Science, University of Bahrain, Sakhir, 32038, Bahrain, Department of Chemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan; Khan, R.A., Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan; Shah, F., Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, Pakistan; Sirajuddin, HEJ Research Institute of Chemistry, ICCBS, University of Karachi, Karachi, 75270, Pakistan; Sherazi, S.T.H., National Centre of Excellence in Analytical chemistry, University of Sind, Jamshoro, Pakistan; Iqbal, M., Department of Chemistry, University of Lahore, Lahore, Pakistan
Publication Date: 2019
Summary: In this study four catalysts (ƴ –Alumina, α- Alumina, silica gel and silica ppt) with different physicochemical characteristics were tested for the pyrolysis of polystyrene (PS) under inert atmosphere in the temperature range 200-650 °C at heating rate 5 °C/min. The silica gel a mesoporous catalyst, with a greater pore size and surface area was found to be the most active materials in terms of reduction in maximum temperature. The ƴ –Alumina catalyst also shows good result because of the acidic sites, surface area, and pores size, however, its degradation effect is less than silica gel. The effect of α- Alumina catalyst on the pyrolysis of PS is less pronounced due to its small surface area, pore size and lack of acidic sites on its surface. The effects of these catalysts show that surface area, number of acidic sites and pore size were observed as the key factors for effective degradation of polymers. © 2019 Chemical Society of Pakistan. All rights reserved.
Eshan2020-11-28T19:32:43+00:00
