Catalytic Synthesis of Carbon Nanotubes and Hydrogen Gas from Waste Plastics Using LaNiO3 Perovskite Catalyst

Using waste plastic syngas to prepare carbon nanotubes (CNTs) and hydrogen-rich gas is a clean and efficient recycling method for waste plastics, and it is very important to find out how to improve its yield and quality. In this work, CNTs and hydrogen-rich gas were prepared by LaNiO 3 perovskitetype catalysts from waste plastic syngas model compound in laboratory. The LaNiO 3 catalysts, carbon nanotubes and gas fractions produced at different temperatures were characterized and compared with the supported catalyst Ni/ZSM-5. The main conclusions were as follows: 650 °C catalytic temperature had maximum carbon nanotubes yield of 5.84 g CNTs /g Catalyst and H 2 content of 44 Vol.%, which was 4.44 times the carbon nanotubes yield from the Ni/ZSM-5 catalyst at the same temperature case. A bottom growth pattern of carbon nanotubes produced on the LaNiO 3 catalyst was observed by high resolution transmission electron microscopy (HRTEM). The X-ray crystal diffractometer (XRD) analysis revealed that the interaction force between Ni and the carrier was stronger in LaNiO 3 than that of the Ni/ZSM-5 catalyst, resulting in two different growth patterns of carbon nanotubes. The present experiments probe that the LaNiO 3 catalysts have a greater prospect of application in the preparation of CNTs and hydrogen-rich gas from waste plastic syngas.