Comparative Study of Hydrogen Thermal Decompostion Characteristics According to Space Velocity Using Combustible Waste Plastics

Abstract

This Study using combustibe waste plastic compared the pyrolysis Characteristics according to GHSV and the performance of various catalysts for hydrogen production reactor. pyrolysis synthetic oil and synthetic gas (H<sub>2</sub>/CO) of waste plastic are produced using a gasification reactor in a lab scale. HDPE, PP, PS, among the main components of waste plastic were selected as a sample. It was possible to produce high value added hydrogen by producing hydrogen and crude oil through the catalytic reforming reaction that is improved the pyrolysis in vapor. The production of crude oil without catalysts was high at 70.2 wt% and among oil with more 18 hydrocarbons wax’s hydrocarbons accounted for 70.47%. On the other hand in the case of producing crude oil using a catalyst the amount decreased, but the hydrocarbon percentage of increased C<sub>5</sub>~C<sub>14</sub>. As a result of the pyrolysis of each of the catalysts determined according to the GHSV. 10,000 hr-1, 8,000 hr-1, 5,000 hr-1, amount of synthetic oil produced in the case of the GHSV was higher than the other two conditions, but the hydrocarbon of C<sub>5</sub>~C<sub>14</sub> was 30~40%. Based on this it was confirmed that the caloric value of the pyrosis crude oil was up to 11.583 kcal/kg and the pyrolysis oil yield was 58%. In a lab-scale in ternal circulating pyolysis gasification reactor waste plastic is pyrolyzed into catalysts, heat and material resins pyrolyzed into catalysts, heat and material resins at isothermal temperature to produce plastic products such as PS, PE, PP and phthalate.