The development of porosity in Pittsburgh No. 8 char as studied using contrast matching small angle neutron scattering
Conference
·
OSTI ID:214676
- Univ. of Strathclyde, Glasgow (United Kingdom); and others
Contrast matching small angle neutron scattering has been used to investigate the development of porosity in Pittsburgh No. 8 coal char during gasification in air at 673K. Deuterated toluene contrast matches very well with polycrystalline graphite carbon. Scattering from the contrast matched ungasified sample shown that there is very little closed porosity in the ungasified sample. It is shown that scattering from the dry sample is due to interparticle effects. Subtraction of the contrast matched scattering and the interparticle scattering from the overall scattering of samples gives information about open porosity. It is shown that microporosity is produced in the initial stages of gasification of Pittsburgh No. 8 char followed by the creation of a pore system with a broader range of sizes. This picture is shown to agree qualitatively with 77K nitrogen adsorption isotherms.
- OSTI ID:
- 214676
- Report Number(s):
- CONF-950801--
- Country of Publication:
- United States
- Language:
- English
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