What is it about?
New three-phase diagram for carbon is proposed. Quantitative description of gas-solid carbon equilibrium conditions is critically evaluated for filamentous carbon. Series of C-H-O ternary diagrams with boundary lines are constructed for carbon deposition either as graphite or nanotubes, CNTs. Allowing for CNTs in carbon deposition leads to significant lowering of the critical carbon content in the reformates in temperatures from 500°C upward.
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Why is it important?
Allowing for CNTs in carbon deposition leads to significant lowering of the critical carbon content in the reformates in temperatures from 500°C upward as compared to graphite with the maximum shifting up the deposition boundary O/C values by about 17% and 28%, respectively, at 1 and 10 bar.
Perspectives
In the next papers, that analysis is applied to C-H-O reformates of light hydrocarbons resulting from the catalycic partial oxidation, wet (with H2O) or dry (with CO2) reforming.
Zdzislaw Jaworski
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
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This page is a summary of: On thermodynamic equilibrium of carbon deposition from gaseous C-H-O mixtures: updating for nanotubes, Reviews in Chemical Engineering, January 2017, De Gruyter,
DOI: 10.1515/revce-2016-0022.
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