HYDROGEN PRODUCTION BY STEAM-GASIFICATION OF PETROLEUM COKE USING CONCENTRATED SOLAR POWER - REACTOR EXPERIMENTATION WITH SLURRY FEEDING

摘要

We report on the experimental evaluation of a 5 kW solar chemical reactor for the steam-gasification of petcoke, carried out at PSFs 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 residence time of 2.4 s, and a water-petcoke molar ratio of 4.8, the maximum degree of petcoke conversion was 87%. Typical syngas composition produced was 62% H{sub}2, 25% CO, 12% CO{sub}2, and 1% CH{sub}4. The 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 urn) and slurry stoichiometry (range 2.1-6.3) on the degree of chemical conversion and energy conversion efficiency was examined.