The early stages of the combustion of pulverized coal at high temperatures II: Measurements of the size and composition of the resulting char

1990 ◽  
Vol 80 (2) ◽  
pp. 170-182 ◽  
Author(s):  
N.C. Beck ◽  
A.N. Hayhurst
Keyword(s):  
High Temperatures ◽  
Pulverized Coal ◽  
Early Stages

Spectroscopic Observation of Chemical Species From High-Temperature Air Pulverized Coal Combustion

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Nelfa Desmira ◽  
Takuya Nagasaka ◽  
Kimihito Narukawa ◽  
Akira Ishikawa ◽  
Kuniyuki Kitagawa ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperatures ◽  
Flame Temperature ◽  
Chemical Species ◽  
Emission Spectra ◽  
Video Camera ◽  
Spectroscopic Observation ◽  
Pulverized Coal ◽  
In Situ Monitoring ◽  
Lean Combustion

In situ monitoring of chemical species from the combustion pulverized coal in high-temperature air is examined using several different spectroscopic diagnostic at different equivalence ratios. Two-dimensional (2D) distributions of flame temperature were obtained using a thermal video camera. The experimental results showed the temperatures to range from low to 1400 °C under various conditions of fuel-lean, stoichiometric, and fuel-rich. The highest temperature and flame stability were obtained under fuel-lean combustion condition. The chemical species generated from within the combustion zone were analyzed from the spontaneous emission spectra of the flame in the Ultraviolet–visible (UV-Vis) range. The spatial distribution of NO, OH, and CN were identified from the spectra. The 2D distribution of emission intensity visualized and recorded for NO, OH, and CN revealed high-temperatures close to the root of the flame that rapidly dispersed radially outward to provide very high temperatures over a much larger volume at further downstream locations of the flame.

Study of the early stages of Cr/4H-SiC(11-20) interface formation and its behavior at high temperatures

2008 ◽  
Vol 5 (12) ◽  
pp. 3744-3747 ◽  
Author(s):  
I. Dontas ◽  
S. Karakalos ◽  
S. Ladas ◽  
S. Kennou
Keyword(s):  
High Temperatures ◽  
Interface Formation ◽  
Early Stages
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