TY - JOUR
T1 - Diagnostics of carbon gasification by Raman microprobe spectroscopy
AU - Bar-Ziv, E.
AU - Zaida, A.
N1 - Funding Information:
We would like to thank Oded Navon, from the Hebrew University of Jerusalem, for enabling us to use the Raman spectrometer. We also acknowledge Tsachi Livneh for useful discussions. The assistance of Mr. Sabato Masi in performing TGA experiments is gratefully acknowledged. This research was partially supported by a grant from Israel Science Foundation, no. 239/98.
PY - 2000/1/1
Y1 - 2000/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0033664399&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0033664399
SP - 85
JO - International Symposium on Combustion Abstracts of Accepted Papers
JF - International Symposium on Combustion Abstracts of Accepted Papers
IS - A
T2 - 28th International Symposium on Combustion
Y2 - 30 July 2000 through 4 August 2000
ER -