Abstract−Waste tyres have become a grave concern as their accumulation is aggregating every year. Not only the size of waste tyre has to be reduced, but also some useful energy has to be recovered out of it as the world badly requires energy from alternate sources. Pyrolysis is one such method to extract energy potential products from waste tyres. It is extensively used to generate carbon black (solid product), tyre-oil (liquid product) and syngas (gas product) from waste tyres. In that connection, this article discusses the effect of various parameters on the product composition of pyrolysis of waste tyres. The current usage of pyrolysis products and their typical characteristics are also discussed in this critique. Of late, extraction of high value added products, such as activated carbon from carbon black, and limonene from tyre-oil is gaining attention. The article also throws some light on the application and generation routes of activated carbon and limonene from waste tyres.

Fast pyrolysis experiments of larch sawdust were conducted in a conical spouted‐bed reactor to study the influences of reaction temperature, inlet gas velocity, feeding rate, and particle size on the product yield and pyrolysis oil quality. For the first time, the optimal conditions were determined for various pyrolysis operations of such reactor to increase the yield and quality of pyrolysis oil. The results demonstrate that the biomass particle size, reaction temperature, biomass feeding rate, and inlet gas velocity all affected the quality and yield of the pyrolysis oil, in this order.

No abstract

In this study, the hydrodynamics of the conical spouted bed reactor was examined to find out stable spouting regime and appropriate gas residence time. And the effects of pyrolysis reaction temperature for the production of the bio‐oil in a conical spouted bed reactor were scrutinized by fast pyrolysis experiment. Stable hydrodynamic operating ranges were identified by evaluation of the pressure drop curve and RMS analysis. The yield of the bio‐oil reached a maximum of 50.8 wt % at reaction temperature of 500°C, while the yield of the char decreased as the reaction temperature increased. Also, the yield of the non‐condensable gas increased when the reaction temperature increased. The water content of the bio‐oil was lowest, 26.1wt %, at 500°C, and the high heating value was highest, 18.4 MJ/kg, at 500°C. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 685–689, 2017

AbstractsThe biomass resources is one of promising ways to solve energy exhaustion issues and global warming issues at the same time. To evaluate domestic biomass resources potential such as agricultural wastes, forestry wastes, livestock wastes and municipal solid wastes, statistics data from various organizations were collected and analyzed in this study. Also, space energy densities of each districts in Korea were calculated and analyzed. The results from the evaluation of biomass energy potential and space energy densities in Korea might be useful to estimate the availability of biomass energy conversion processes and to choice a appropriate process to convert domestic biomass into energy.