Research on comparative study on the conversion of waste plastic materials to liquid hydrocarbons through catalytic Pyrolysis

Abstract

This research involves the application of pyrolysis has been viewed as an efficient means for the proper disposal of waste plastics in the environment amongst others. In this research, the influence of two catalysts namely; Zeolite and Titanium (IV) oxide are examined. Zeolite as a catalyst has obtained approval due to its ability to ensure the production of liquid hydrocarbons when applied in the pyrolysis of waste plastics. It has also been used a bench mark to determine the effectiveness of other catalyst in producing liquid hydrocarbons. Whereas, Titanium (IV) oxide which is known for its many applications in paints, pharmaceuticals and cosmetics is another catalyst which is used in catalytic pyrolysis of waste plastics for the first time. Titanium (IV) oxide has several appealing properties such as its mesoporous structure, mechanical resistance and high stability which are some of the reasons which prompted its use. This comparative study between this two catalysts were done at the same time in order to monitor the changes in temperature and other reaction conditions. The waste plastics used in this research were low density polyethylene and polypropylene. Positive results were gotten as the liquid hydrocarbons were formed. In the experimental phase, various ratios were used and all were to maximise catalyst consumption. Again, it was proved that Zeolite has a strong effect in the characteristics and distribution of pyrolysis products. Titanium (IV) oxide also produced good results but the better results are seen with its combination with polypropylene.