Structural characterization of Green River oil-shale at high-pressure using pair distribution function analysis and small angle x-ray scattering.
The compression behavior of a silicate-rich oil shale from the Green River formation in the pressure range 0.0-2.4 GPa was studied using in situ high pressure X-ray pair distribution function (PDF) measurements for the sample contained within a Paris-Edinburgh cell. The real-space local structural information in the PDF, G(r), was used to evaluate the compressibility of the oil shale. Specifically, the pressure-induced reduction in the medium- to long-range atom distances (6-20 {angstrom}) yielded an average sample compressibility corresponding to a bulk modulus of ca. 61-67 GPa. A structural model consisting of a three phase mixture of the principal crystalline oil shale components (quartz, albite and Illite) provided a good fit to the ambient pressure PDF data (R 30.7%). Indeed the features in the PDF beyond 6 {angstrom}, were similarly well fit by a single phase model of the highest symmetry, highly crystalline quartz component.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); Chevron Energy Technology Co.
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 982340
- Report Number(s):
- ANL/CSE/CP-60562; TRN: US201013%%1018
- Resource Relation:
- Conference: American Chemical Society Spring 2008 National Meeting and Exposition of the American Chemical Society; Apr. 6, 2008 - Apr. 10, 2008; New Orleans, LA
- Country of Publication:
- United States
- Language:
- ENGLISH
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