A new kinetic model for the NO-carbon reaction

Y. H. Li, L. R. Radovic, G. Q. Lu, V. Rudolph

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48 Scopus citations

Abstract

The kinetics of the NO-carbon reaction was studied by thermogravimetric analysis (TGA). The reactivity as a function of carbon conversion was systematically investigated through characterization of the pore structure and carbon active site evolution during reaction. Total surface area measured by CO2 adsorption at 273 K gives a relatively constant normalized reactivity over a wide range of carbon conversions. The carbon active surface area (ASA) and unoccupied active surface area (UASA) were estimated from low-temperature NO chemisorption capacities. Large amounts of stable C-O complexes are found to form during the reaction. Results show that ASA or UASA measured in this way do not represent the reactive surface area under gasification conditions. A new kinetic model is introduced by taking into account the contributions from different carbon-oxygen surface complexes during reaction, based on the recently proposed unified kinetic scheme of Yang and coworkers.

Original languageEnglish (US)
Pages (from-to)4125-4136
Number of pages12
JournalChemical Engineering Science
Volume54
Issue number19
DOIs
StatePublished - Jun 25 1999

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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