Experimental Study of Low-Temperature Shale Combustion and Pyrolysis Under Inert and Noninert Environments
- Wei Chen (Soochow University) | Yu Zhou (Soochow University) | Weigang Yu (Soochow University) | Leilei Yang (China University of Petroleum, Beijing)
- Document ID
- Society of Petroleum Engineers
- SPE Production & Operations
- Publication Date
- February 2020
- Document Type
- Journal Paper
- 178 - 187
- 2020.Society of Petroleum Engineers
- permeability, pore, shale, combustion, pyrolysis
- 6 in the last 30 days
- 97 since 2007
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In this study, shale samples were heated under inert and noninert environments to increase the permeability of the shale. The nanoscale pore structure changes under combustion and pyrolysis [air, nitrogen (N2), carbon dioxide (CO2), and argon (Ar)] conditions were investigated. It was found that pore diameters increased under all the gas environments. Pore diameters increased more significantly under air environment compared with other gas conditions. However, the diameters of the shale particles remained almost constant during combustion. Moreover, gases emitted from the shale during the combustion and pyrolysis process were investigated using thermogravimetric analysis coupled to Fourier-transform infrared spectroscopy (TGA-FTIR). Finally, scanning electron microscopy (SEM) images showed larger pores on the surfaces of the combusted and pyrolyzed shale samples.
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