Diagnostics of carbon gasification by Raman microprobe spectroscopy

E. Bar-Ziv, A. Zaida

Research output: Contribution to journalArticlepeer-review

Abstract

The use of Raman microprobe spectroscopy to determine the influence of heat treatment on the evolution of reactivity and morphology of carbons (petroleum coke (PC) and South African coal (SA)) was studied. Samples of the untreated carbons and carbons that were heat treated in nitrogen at 500°-2000°C for different times were subjected to TGA and Raman microprobe spectroscopy. Mineral matter had negligible impact on Raman spectra. Since the Raman scattering depth was a few tens of nonometers, a carbon layer larger than that coated mineral matters. There was a good correlation between gasification reactivity and Raman properties for samples of the two carbons that were heated up to 1200°C for 30 min holding time. In this range of heat treatment conditions, the ratio between the intensity of the low and high wavenumbers correlated well with both O2 and CO2 char gasification reactivity. Minor changes in Raman properties were detected for more intense heat treatments despite further reactivity loss corresponding to such treatments. Original is an abstract.

Original languageEnglish
Pages (from-to)85
Number of pages1
JournalInternational Symposium on Combustion Abstracts of Accepted Papers
Issue numberA
StatePublished - 1 Jan 2000
Event28th International Symposium on Combustion - Edinburgh, United Kingdom
Duration: 30 Jul 20004 Aug 2000

ASJC Scopus subject areas

  • General Engineering

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