Hydrogen production by steam-gasification of petroleum coke using concentrated solar power—III. Reactor experimentation with slurry feeding
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Date
2007-06
Publication Type
Journal Article
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yes
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Abstract
We report on the experimental evaluation of a 5 kW solar chemical reactor for the steam-gasification of petcoke, carried out in a high-flux solar furnace. A petcoke-water slurry was continuously injected into a solar cavity-receiver to create a vortex flow directly exposed to concentrated solar radiation. For a nominal reactor temperature of 1500 K, a water-petcoke molar ratio of 4.8, and a residence time of 2.4 s, the maximum degree of petcoke conversion was 87%. Typical syngas composition produced was 62% H2, 25% CO, 12% CO2, and 1% CH4. The solar energy conversion efficiency-defined as the portion of solar energy absorbed as chemical energy and sensible heat-attained 17%. The effect of varying the particle size (range 8.5-200 μ m) and slurry stoichiometry (range 2.1-6.3) on the degree of chemical conversion and energy conversion efficiency was examined.
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published
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Journal / series
Volume
32 (8)
Pages / Article No.
992 - 996
Publisher
Elsevier
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Subject
Solar; Gasification; Slurry; Carbonaceous materials; Hydrogen
Organisational unit
03530 - Steinfeld, Aldo (emeritus) / Steinfeld, Aldo (emeritus)