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Removal and Conversion of Tar in Syngas from Woody Biomass Gasification for Power Utilization Using Catalytic Hydrocracking
School of Environmental Science and Spatial Informatics, China University of Mining and Technology (CUMT), Xuzhou 221008, China
Institute of Energy and Environmental Technology e.V. (IUTA), Duisburg 47229, Germany
* Author to whom correspondence should be addressed.
Received: 27 June 2011; in revised form: 4 August 2011 / Accepted: 4 August 2011 / Published: 12 August 2011
Abstract: Biomass gasification has yet to obtain industrial acceptance. The high residual tar concentrations in syngas prevent any ambitious utilization. In this paper a novel gas purification technology based on catalytic hydrocracking is introduced, whereby most of the tarry components can be converted and removed. Pilot scale experiments were carried out with an updraft gasifier. The hydrocracking catalyst was palladium (Pd). The results show the dominant role of temperature and flow rate. At a constant flow rate of 20 Nm3/h and temperatures of 500 °C, 600 °C and 700 °C the tar conversion rates reached 44.9%, 78.1% and 92.3%, respectively. These results could be increased up to 98.6% and 99.3% by using an operating temperature of 700 °C and lower flow rates of 15 Nm3/h and 10 Nm3/h. The syngas quality after the purification process at 700 °C/10 Nm3/h is acceptable for inner combustion (IC) gas engine utilization.
Keywords: biomass gasification; tar conversion; catalytic hydrocracking
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Huang, J.; Schmidt, K.G.; Bian, Z. Removal and Conversion of Tar in Syngas from Woody Biomass Gasification for Power Utilization Using Catalytic Hydrocracking. Energies 2011, 4, 1163-1177.
Huang J, Schmidt KG, Bian Z. Removal and Conversion of Tar in Syngas from Woody Biomass Gasification for Power Utilization Using Catalytic Hydrocracking. Energies. 2011; 4(8):1163-1177.
Huang, Jiu; Schmidt, Klaus Gerhard; Bian, Zhengfu. 2011. "Removal and Conversion of Tar in Syngas from Woody Biomass Gasification for Power Utilization Using Catalytic Hydrocracking." Energies 4, no. 8: 1163-1177.