Experimental study on gasification of bituminutesous coal char with CO2 catalysed by CaO

The effects of CaO under normal pressure and CaO soaked in ammonia on the isothermal gasification of Jinjie bituminous coal char-CO2 are studied on the self-built fixed-bed experimental bench with analytical pure CaO as the precursor. The experimental results show that the gasification activity of J...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2019-10, Vol.354 (1), p.12036
Main Authors: Suo, X L, Song, Y, Sheng, J G
Format: Article
Language:English
Subjects:
Ammonia
Bituminous coal
Calcium oxide
Carbon dioxide
Catalysts
Coal
Gasification
Saturation
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Summary:The effects of CaO under normal pressure and CaO soaked in ammonia on the isothermal gasification of Jinjie bituminous coal char-CO2 are studied on the self-built fixed-bed experimental bench with analytical pure CaO as the precursor. The experimental results show that the gasification activity of Jinjie coal char increases with the increase of Ca addition. The load saturation is 5% at 780°C gasification temperature, and the load saturation are 3% at 810°C, 850°C and 900°C. Adding 3% CaO coal char can reduce the gasification temperature by 120°C, and reduce the coal char conversion rate to 95% by 85 min at 900°C gasification temperature. After soaking in ammonia water, the gasification activity of coal char and the gasification activity of coal char added with CaO catalyst are increased to different degrees. At 850°C, the increase of K value and Rm reach the maximum when CaO catalyzes coal char gasfication by ammonia immersion, which are 49.7% and 35.9%, respectively.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/354/1/012036