Oil And Gas Yields From Devonian Oil Shale In The 50 Lb Hr Kentort Ii Process Demonstration Unit Initial Results

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ISBN 13 :
Total Pages : 336 pages
Book Rating : 4.:/5 (873 download)

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Download or read book The Development of an Integrated Multistaged Fluid-bed Retorting Process. Final Report, September 1990--August 1994 written by and published by . This book was released on 1995 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This summarizes the development of the KENTORT II retorting process, which includes integral fluidized bed zones for pyrolysis, gasification, and combustion of oil shale. Purpose was to design and test the process at the 50-lb/hr scale. The program included bench- scale studies of coking and cracking reactions of shale oil vapors over processed shale particles to address issues of scaleup associated with solid-recycle retorting. The bench-scale studies showed that higher amounts of carbon coverage reduce the rate of subsequent carbon deposition by shale oil vapors onto processed shale particles; however carbon-covered materials were also active in terms of cracking and coking. Main focus was the 50-lb/hr KENTORT II PDU. Cold-flow modeling and shakedown were done before the PDU was made ready for operation. Seven mass-balanced, steady-state runs were completed within the window of design operating conditions. Goals were achieved: shale feedrate, run duration (10 hr), shale recirculation rates (4:1 to pyrolyzer and 10:1 to combustor), bed temperatures (pyrolyzer 530°C, gasifier 750°C, combustor 830°C), and general operating stability. Highest oil yields (up to 109% of Fischer assay) were achieved for runs lasting ≥ 10 hours. High C content of the solids used for heat transfer to the pyrolysis zone contributed to the enhanced oil yield achieved.