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Energies 2016, 9(2), 67; doi:10.3390/en9020067

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

1,†,* , 2,†
and
1
1
Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
2
College of Information and Computer Science, Shanghai Business School, Shanghai 200235, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Tariq Al-Shemmeri
Received: 5 November 2015 / Revised: 28 December 2015 / Accepted: 12 January 2016 / Published: 22 January 2016
(This article belongs to the Special Issue Advances in Biomass for Energy Technology)
View Full-Text   |   Download PDF [4595 KB, uploaded 22 January 2016]   |  

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/Nm3 and gas production rate of 2.32 Nm3/kg could be produced. Tar concentration in the fuel gas could be reduced to 108 mg/Nm3 (at the gasifier outlet) and 38 mg/Nm3 (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. View Full-Text
Keywords: biomass gasification; air staged; rotary kiln; partial oxidation; energy balance biomass gasification; air staged; rotary kiln; partial oxidation; energy balance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shi, H.; Si, W.; Li, X. The Concept, Design and Performance of a Novel Rotary Kiln Type Air-Staged Biomass Gasifier. Energies 2016, 9, 67.

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