Development of Intensive Hot Syngas Clean-up System for Biomass Gasification

Abstract

Gasification is one of the most efficient ways to generate energy from biomass and carbon containing solid waste. Gasification of biomass produces syngas usually consisting of CO, H-2, CH4, CO2, N-2, H2O gases. However, besides these gases, syngas also includes pollutants such as particulates and tar. In order to utilize product syngas in an internal combustion engines and turbines, the final produced gas must be purified from these unwanted pollutants. In this study, an intensified and integrated syngas cleanup system, which consists of a sintered metal filter resistant to high temperatures to remove particulates and catalyst bed in order to remove tar, was designed and developed. Metal filters have diameters of 10 mu m and made of 316 L stainless steel properties. On the other hand, honeycomb-shaped nickel-based catalyst is used for tar cracking. This system was placed in the gas outlet of the fixed bed gasification reactor operated under hot gas conditions and at a fuel supply flow rate of 100 kg / h. The wood chip as biomass feedstock was chosen as the gasification raw material. The parameters that affects the cleaning of the produced syngas in the integrated syngas clean-up system and gas cleaning efficiency (particulates and tar concentration) were examined and the system was optimized accordingly. The average particulate matters amount of 0.2 g/m(n)(3) and the average amount of tar 15 g/m(n)(3) after intensive filter system. The results showed that the treated gas is not yet at a level that can be used in gas applications. Experiments still continue to better results.