The Concept, Design and Performance of a Novel Rotary Kiln Type Air-Staged Biomass Gasifier

Huiyuan Shi, Wen Si and Xi Li
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Huiyuan Shi: Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
Wen Si: College of Information and Computer Science, Shanghai Business School, Shanghai 200235, China
Xi Li: Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China

Energies, 2016, vol. 9, issue 2, 1-18

Abstract: Tar formation is the main bottleneck for biomass gasification technology. A novel rotary kiln type biomass gasification process was proposed. The concept design was based on air staging and process separation. This concept was demonstrated on a pilot scale rotary kiln reactor under ambient pressure and autothermic conditions. The pilot scale gasifier was divided into three different reaction regions, which were oxidative degradation, partial oxidation and char gasification. A series of tests was conducted to investigate the effect of key parameters. The results indicate that under optimum operating conditions, a fuel gas with high heat value of about 5500 kJ/Nm 3 and gas production rate of 2.32 Nm 3 /kg could be produced. Tar concentration in the fuel gas could be reduced to 108 mg/Nm 3 (at the gasifier outlet) and 38 mg/Nm 3 (after gas conditioning). The cold gas efficiency and carbon conversion rate reached 75% and 78%, respectively. The performance of this gasification system shows considerable potential for implementation in distributed electricity and heat supply projects.

Keywords: biomass gasification; air staged; rotary kiln; partial oxidation; energy balance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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