Fluidized bed gasification characteristics of Devonian oil shale char

✍ Scribed by Aurora M. Rubel; Thomas L. Robl; Scott D. Carter

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 899 KB
• Volume: 69
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(90)90010-n

✦ Synopsis

A Kentucky oil shale char was gasified in a fluid bed reactor. The effects of mean solid residence time (MSRT), bed temperature, and steam and CO2 partial pressure were studied. Carbon reactions during gasification were found to be dependent on all three parameters. The steam/char reaction was the dominant primary gasification reaction. The CO,/char reaction did not proceed significantly under the conditions studied and CO/CO, ratio was dependent on the steam partial pressure. Sulphur removal was less dependent on temperature and steam partial pressure and was essentially complete by 1800 s MSRT. Nearly complete sulphur conversion was the result of both thermal decomposition and steam reaction with pyrrhotite. Conversions of 80-85% sulphur and 7&75% carbon (raw shale basis) were obtained for combined pyrolysis/gasification. The implications of the results for the development of a retorting process for Devon& shales-are discussed.