A comparison of fluidized bed pyrolysis of oil sand from Utah, USA, and Alberta, Canada

Autor: Ho-Jung Ryu, Jaehyeok Park, Dal-Hee Bae, Jong-Seon Shin, Dowon Shun
Rok vydání: 2017
Předmět:
Zdroj: Korean Journal of Chemical Engineering. 34:3125-3131
ISSN: 1975-7220
0256-1115
DOI: 10.1007/s11814-017-0233-8
Popis: Characterization and thermal pyrolysis of oil sand was conducted. The experiment was performed on Circle Cliffs, Utah, U.S.A. and the results were compared with the data from Alberta, Canada. The reaction character identified by TGA was dual mode of vaporization of light hydrocarbon and thermal cracking of high molecular hydrocarbon. The pyrolysis experiment was performed in a 2 kg/h capacity fluidized bed externally heated by electricity. The process variables investigated were a temperature range of 723-923 K, fluidization gas velocity of 1.5-2 times of the minimum fluidization velocity, solid retention time of 15-30 minutes, and average particle size of 435 microns. The results of TGA and elemental analysis of bitumen provided necessary information regarding maximum liquid yield from the pyrolysis prior to pyrolysis experiment. The oil yield was maximum at 823 K. The yield of liquid was not exceeding the weight percent of maltenes in original bitumen. The optimum reaction condition should be fast vaporization of light hydrocarbon and minimizing thermal cracking of high molecular hydrocarbon. To maximize the liquid yield, fast heating and vaporization of oil sand bitumen and then the rapid removal of the vaporized product from the heating zone is recommended, i.e., operation in a fluidized bed reactor.
Databáze: OpenAIRE
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