Chemical vapor deposition: Stable carbons from low-rank coals

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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 ... continued below

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8 p.

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Sharma, R.K.; Kulas, R.W. & Olson, E.S. July 1, 1996.

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Description

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.

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8 p.

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OSTI as DE96013193

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  • 212. national meeting of the American Chemical Society (ACS), Orlando, FL (United States), 25-30 Aug 1996

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  • Other: DE96013193
  • Report No.: DOE/MC/30097--96/C0706
  • Report No.: CONF-960807--8
  • Grant Number: FC21-93MC30097
  • Office of Scientific & Technical Information Report Number: 274150
  • Archival Resource Key: ark:/67531/metadc664325

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Office of Scientific & Technical Information Technical Reports

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  • July 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • May 2, 2016, 1:23 p.m.

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Sharma, R.K.; Kulas, R.W. & Olson, E.S. Chemical vapor deposition: Stable carbons from low-rank coals, article, July 1, 1996; Grand Forks, North Dakota. (digital.library.unt.edu/ark:/67531/metadc664325/: accessed October 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.