A Novelty Catalytic Reforming of Tire Pyrolysis Oil for Rich-Hydrogen Syngas

Abstract

Pyrolysis oil and pyrolysis char from the side wall rubber under the atmosphere and high pressure have been reported with poor quality. In this research, the influence of two-layer catalysts on the catalytic reforming syngas distribution derived from side wall rubber pyrolysis oil (SWRO) were explored. The side wall rubber pyrolysis char (SWRC) as a catalyst and carrier support was the first-layer catalyst, and the calcined bottom ash (CBA) from oil sludge combustion was the secondary catalyst. Different testing and analysis methods including BET, XRD, SEM, and Raman were employed to characterize the properties of catalysts before and after experiment. The SWRC contained a rich pore structure to provide active sites for the cracking of SWRPO. Steam was used as an activator to activate SWRC and improve the concentration of CO and H2 in catalytic reforming syngas. To enhance the H2 concentration in the syngas, both nickel and CBA were used as additional activate components of SWRC. Consequently, the yield and LHV of syngas increased from 0.05 g·goil-1 and 2.03 kJ·g-1 to 0.42 g·goil-1 and 11.32 kJ·g-1, respectively. The H2 concentration increased from 20.38 vol.% to 44.68 vol.% in syngas with two-layer catalysts. The yield of carbon deposit increased to 0.57 g·goil-1. The lifetime of two-layer catalysts reached 17 h with a stability conversion process of SWRPO.

Keywords: Catalytic reforming, Pyrolysis char, Pyrolysis oil, Nickel, Bottom ash.