Effect of Residence Time and Chemical Activation on Pyrolysis Product from Tires Waste

Abstract

In this study, active carbon produced from tires waste using pyrolysis was investigated. As tires were made predominantly from the petroleum product rubber, they have a high heating value, as well as high volatile content and medium sulfur content. Those properties make them excellent candidates for pyrolysis, which can be used to recover energy and by-products. Pyrolysis has been conducted until the temperature of 750 °C and holds in residence time variation of 5, 60, and 120 min after oil and gas completely produced. Char was produced via pyrolysis then activated by chemical activation using NaCl solution for 24 hours followed by drying at the temperature of 100 °C for 1 hour. Activated carbon as pyrolysis product then analyzed using Scanning Electron Microscope, BET analysis and N₂ adsorption analysis. It was observed that the pore size of the resulting carbon generally increases as increasing of residence time. In addition, increasing residence time also resulted in enhanced higher porosity development after chemical activation using NaCl as high as 2.19 nm with BET surface area of 28.19 m²/g. The formation of pores with an average diameter of pore 8 µm was observed on the carbon surface.