Treatment of pyrolysis gas product of waste thermoplastic by adsorption process

Within the scope of this study, it is aimed to minimize the environmental damage by focusing on gas products that are economically insignificant and exhibit toxic properties while exhibiting alternative approaches for the evaluation of pyrolysis by-products. With the experimental studies carried out in this direction, pyrolysis processes of HDPE, LDPE and PP type plastic wastes were carried out at target temperatures of 500, 600 and 700 ° C, respectively. The solid product (char) obtained from these pyrolysis processes was subjected to the activation procedure and compared with activated carbon (AC), the most important adsorbent in the literature. Then, the adsorption efficiency of this adsorbent obtained from the pyrolysis of the related plastic type was investigated by analytical methods. At the end of the study, in the adsorption of the pyrolysis gas product; For HDPE, LDPE and PP pyrolysis, yields of 60-80%, 40-90% and 40-80% were obtained, respectively, for target temperatures. In the adsorption columns formed from pyrolysis char, HDPE-type activated char adsorbed with the highest efficiency in the holding of pyrolysis gases were toluene, styrene and ethylbenzene at 500, 600 and 700 °C, respectively. In LDPE, these components were pentane, octane and benzene, respectively, while for the PP type, they were toluene, styrene and styrene, respectively. When an evaluation was made with the results of the BET analysis, an 18-fold increase in HDPE and a 20-fold increase in LDPE was observed at the surface area of char species compared to their non-activation state with the activation method. With this thesis study, an alternative way to the use of char, which is one of the by-products emerging after the disposal of plastic wastes by pyrolysis method, was provided, while the treatment of pyrolytic gas, which is another pyrolysis product and known toxic properties, was provided by adsorption method.