Chemical vapor deposition: Stable carbons from low-rank coals
Conference
·
OSTI ID:274150
CVD was used to increase the oxidative stability of activated carbons. Activated carbons prepared from Gascoyne lignite (North Dakota) by thermal or KOH activation were subjected to BCl{sub 3} in He at 727 C with or without benzene for alimited period of time followed by annealing in He at 900 C for 3 days. Untreated and acid-washed coal samples were used to assess the effect of minral matter in the coal on the boron coating. The oxidative stability of the boron-modified carbons was determined from the decomposition curves obtained from TGA. Modification of the as-received, KOH-treated carbon yielded oxidatively stable carbons up to an initial temperature of 520 , compared to 350 C for the starting material. Similar results were obtained for the carbonized Gascoyne lignite. Sulfurous acid washing of the Gascoyne significantly enhanced the thermal stability (600 C) of the boron-modified carbon.
- Research Organization:
- North Dakota Univ., Grand Forks, ND (United States). Energy and Environmental Research Center
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC21-93MC30097
- OSTI ID:
- 274150
- Report Number(s):
- DOE/MC/30097--96/C0706; CONF-960807--8; ON: DE96013193
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemical vapor deposition: Stable carbons from low-rank coals
Task 5.4 -- Stable and supercritical chars. Semi-annual report, January 1--June 30, 1995
Ruthenium tetroxide oxidation of low-rank coals
Journal Article
·
Mon Dec 30 23:00:00 EST 1996
· Preprints of Papers, American Chemical Society, Division of Fuel Chemistry
·
OSTI ID:430323
Task 5.4 -- Stable and supercritical chars. Semi-annual report, January 1--June 30, 1995
Technical Report
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:650107
Ruthenium tetroxide oxidation of low-rank coals
Conference
·
Mon Dec 31 23:00:00 EST 1984
·
OSTI ID:6323193