Influence of K2CO3 catalyst on rate of hydrogen gasification of carbon black

Hossein Zoheidi, Dennis J. Miller

Research output: Contribution to journalArticle

  • 4 Citations

Abstract

Kinetic rate measurements of the hydrogen gasification of a graphiticed carbon black at 865°C and 500 psig hydrogen are reported for K2CO3 loadings of 0, 1, 5 and 10 wt. %. Potassium loss was measured during reaction; surface area and catalyst loading of residual samples were measured after experiment. A twentyfold increase in gasification rate at 50%-70% conversion is observed upon addition of 10 wt. % K2CO3. Specific reaction rate is approximately constant in the presence of 5% and 10% catalyst but decreases for the uncatalyzed sample. These results, as well as the results of experiments in which the carbon is first degassed, support the postulate that surface oxygen is the primary catalytic entity in the hydrogen gasification and that K2CO3 merely stabilizes and provides additional oxygen on the surface.

LanguageEnglish (US)
Pages265-271
Number of pages7
JournalCarbon
Volume25
Issue number2
DOIs
StatePublished - 1987

Profile

Soot
Carbon Monoxide
Carbon black
Gasification
Hydrogen
Catalysts
Oxygen
Reaction rates
Potassium
Carbon
Experiments
Kinetics
potassium carbonate

Keywords

  • Carbon black
  • gasification catalysis
  • hydrogen
  • potassium
  • potassium carbonate

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Influence of K2CO3 catalyst on rate of hydrogen gasification of carbon black. / Zoheidi, Hossein; Miller, Dennis J.

In: Carbon, Vol. 25, No. 2, 1987, p. 265-271.

Research output: Contribution to journalArticle

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abstract = "Kinetic rate measurements of the hydrogen gasification of a graphiticed carbon black at 865°C and 500 psig hydrogen are reported for K2CO3 loadings of 0, 1, 5 and 10 wt. {\%}. Potassium loss was measured during reaction; surface area and catalyst loading of residual samples were measured after experiment. A twentyfold increase in gasification rate at 50{\%}-70{\%} conversion is observed upon addition of 10 wt. {\%} K2CO3. Specific reaction rate is approximately constant in the presence of 5{\%} and 10{\%} catalyst but decreases for the uncatalyzed sample. These results, as well as the results of experiments in which the carbon is first degassed, support the postulate that surface oxygen is the primary catalytic entity in the hydrogen gasification and that K2CO3 merely stabilizes and provides additional oxygen on the surface.",
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AB - Kinetic rate measurements of the hydrogen gasification of a graphiticed carbon black at 865°C and 500 psig hydrogen are reported for K2CO3 loadings of 0, 1, 5 and 10 wt. %. Potassium loss was measured during reaction; surface area and catalyst loading of residual samples were measured after experiment. A twentyfold increase in gasification rate at 50%-70% conversion is observed upon addition of 10 wt. % K2CO3. Specific reaction rate is approximately constant in the presence of 5% and 10% catalyst but decreases for the uncatalyzed sample. These results, as well as the results of experiments in which the carbon is first degassed, support the postulate that surface oxygen is the primary catalytic entity in the hydrogen gasification and that K2CO3 merely stabilizes and provides additional oxygen on the surface.

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