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Research Papers: Energy Systems Analysis

Experimental Study on Autothermal Cyclone Air Gasification of Biomass

[+] Author and Article Information
Yijun Zhao

School of Energy Science and Engineering,
Harbin Institute of Technology,
92, Xidazhi Street,
Harbin 150001, Heilongjiang, China

Dongdong Feng

School of Energy Science and Engineering,
Harbin Institute of Technology,
92, Xidazhi Street,
Harbin 150001, Heilongjiang, China
e-mail: 08031175@163.com

Zhibo Zhang, Shaozeng Sun, Hongwei Che

School of Energy Science and Engineering,
Harbin Institute of Technology,
92, Xidazhi Street,
Harbin 150001, Heilongjiang, China

Jiyi Luan

School of Mechanical Engineering,
Jiamusi University,
148, Xuefu Street,
Jiamusi 154007, Heilongjiang, China

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received June 19, 2017; final manuscript received October 28, 2017; published online November 28, 2017. Assoc. Editor: Gongnan Xie.

J. Energy Resour. Technol 140(4), 042001 (Nov 28, 2017) (7 pages) Paper No: JERT-17-1298; doi: 10.1115/1.4038383 History: Received June 19, 2017; Revised October 28, 2017

Cyclone gasification technology is commonly used for biomass fuels with small particle sizes, such as rice husks and wood chips. This paper explored the effects of gasification intensity and equivalence ratio on the performance characteristics of an autothermal cyclone gasifier. Increasing the gasification intensity caused the syngas' heating value, the cold gasification efficiency and the carbon conversion rate to increase to a maximum for an intensity of 885.24 kg/(m2 h) before then decreasing as the gasification intensity was further increased. Increasing the equivalence ratio from 0.23 to 0.32 increased the overall temperature of gasifier, decreased the tar content (from 6.84 to 4.96 g/N·m3), and increased the carbon conversion rate (from 47.2% to 62.3%). Increasing the equivalence ratio to 0.26 also increased the syngas' heating value to its maximum of 4.25 MJ/N·m3, which then decreased with further increases in equivalence ratio. A similar trend was observed for the gasification efficiency, which ranged from 30% to 37%. From these tests, a gasification intensity of 885.24 kg/(m2 h) and an equivalence ratio of 0.26 appeared optimal for the autothermal cyclone air gasification of biomass process studied here.

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Figures

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Fig. 1

Schematic diagram of an autothermal cyclone air gasifier

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Fig. 4

Gasifier temperature profile for different gasification intensities

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Fig. 3

Typical temperature profile for starting up of autothermal cyclone gasifier

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Fig. 2

Schematic diagram of experimental autothermal cyclone gasifier system

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Fig. 7

Carbon conversion and cold gasification efficiency for different equivalence ratios

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Fig. 5

Gasifier temperature profile for different equivalence ratios

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Fig. 6

Syngas heating value and tar content for different equivalence ratios

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