Catalyst accessibility in high volatile bituminous coal: Quarterly report
Technical Report
·
OSTI ID:6265284
We are making use of an EPR technique developed in this lab to determine the pore size and number distribution in high volatile bituminous coal using nitroxide spin probes of different sizes, shapes and reactivity. We reported that (1) the reactive site distribution as determined by spin probes measuring approximately 0.6 nm in diameter varies from coal seam to coal seam, (2) the detected acid and phenolic sites in Black Creek Coal (Alabama) and Illinois No. 6 (Argonne Premium Coal Samples Program) exceed the detected amine sites by approximately an order of magnitude, (3) for Mary Lee (Alabama) and Illinois No. 5 (PSOC-699), there are more amine than acid or phenolic sites while Black Creek coal has the greatest number of reactive acid and phenolic sites, and (4) the possibility of a spin probe to be hydrogen bonded in a coal pore was shown not to be an important process for incorporating spin probes in Mary Lee and Black Creek Coal while only a slight factor in samples of Illinois No. 5 (PSOC-699) and Illinois No. 6 (Argonne Premium Coal Program); the number of swellable pores containing spin probes with reactive substituents exceeded those pores containing only hydrogen-bonded spin probes by one to two orders of magnitude. We have begun a study of the number, size, and reactive site distribution for Pittsburgh No. 8 coal from the Argonne Premium Coal Program and PSOC-311 coal (No. 6 seam, Fruitland, New Mexico) from the Penn State Coal Sample Bank. We already have a rather extensive set of spin probe data for Illinois No. 6 coal samples.
- Research Organization:
- Alabama Univ., University (USA). Dept. of Chemistry
- DOE Contract Number:
- FG22-86PC90502
- OSTI ID:
- 6265284
- Report Number(s):
- DOE/PC/90502-4; ON: DE88000629
- Country of Publication:
- United States
- Language:
- English
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