Co-deoxy-liquefaction of willow leaves and waste tires for high-caloric fuel production

摘要

Sulfur is widely present in waste tires and causes difficulty to recycle waste tires as a fuel, while removal of oxygen in biomass is an important premise for its effective utilization. In this study, high caloric fuel (HCF) was prepared by co-deoxy-liquefaction of willow leaves and waste tires. The influence of mixing ratio (0-100%) and temperature (300-500 degrees C) on the product yields and chemical compositions of HCF were investigated. Results showed that the HCF obtained at 400 degrees Cwith mixing ratio of 80/20 (willow leaves : waste tires, m/m) possessed the highest HHV (45.52 MJ/kg), highest alkane content (56.24%) and lowest oxygen content (1.79%). Preliminary analysis of mechanisms indicated that co-deoxy-liquefaction of the mixture inhibited the formation of liquid sulfur compounds, with much of the S element being eliminated from waste tires in the form of SO2, thus improving the quality of the HCF. Experiments also suggested that the overall efficiency of the deoxy-liquefaction of biomass and the desulfur-liquefaction of waste tires were both enhanced by adding waste tires to biomass. So, co-deoxy-liquefaction of biomass and waste tires presents a promising way of producing high caloric fuel with high quality in the future.