High-temperature air/steam-blown gasification of coal in a pressurized spout-fluid bed

Journal Article · Wed Mar 15 04:00:00 EST 2006 · Energy and Fuels

DOI:https://doi.org/10.1021/ef050233h· OSTI ID:20741015

Xiao, Rui; Zhang, Mingyao; Jin, Baosheng; Huang, Yaji; Zhou, Hongcang ^[1]

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1. Southeast University, Nanjing (China). Key Laboratory of Clean Coal Power Generation and Combustion Technology of Ministry of Education

The concept of high-temperature air/steam-blown gasification technology for converting coal into low-caloric-value gas for power generation is proposed and evaluated experimentally. Preliminary experiments are performed in a 0.1 MW thermal input pressurized spout-fluid bed gasifier. The influences of the gasifying agent preheat temperature, the gasification temperature and pressure, the equivalence ratio, the ratio of steam-to-coal on gas composition, gas higher heating value, carbon conversion, and cold gas efficiency are examined. The experimental results prove the feasibility of high-temperature air/steam-blown gasification process. The gas heating value is increased by 23%, when the gasifying agent temperature is increased from 300 to 700 C. For the operation conditions studied, the results show that gasification temperature is the most important factor influencing coal gasification in the spout-fluid bed. The gasifier performance is improved at elevated pressure mainly due to the better fluidization in the reactor. The operating parameters of the equivalence ratio and the ratio of steam-to-coal exist at optimum operating range for a certain coal gasification process. 21 refs., 10 figs., 4 tabs.

• OSTI ID: 20741015
• Journal Information: Energy and Fuels, Journal Name: Energy and Fuels Journal Issue: 2 Vol. 20; ISSN ENFUEM; ISSN 0887-0624
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL GASIFICATION
GAS GENERATORS
PARAMETRIC ANALYSIS
PRESSURIZATION