TITLE:
Effect of Atmosphere on Volatile Emission Characteristic in Oxy-Fuel Combustion
AUTHORS:
Le Wu, Shihe Chen, Jia Luo
KEYWORDS:
Oxy-Fuel Combustion; O2/CO2 Atmosphere; Volatile Emission; Gasification Reaction
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.2,
March
29,
2013
ABSTRACT:
A new type of power supply which was called oxy-fuel combustion power
plant was introduced to reduce greenhouse
gasses emission. In this paper the volatile emission characteristic of pulverized
coal is studied under air atmosphere and oxy-fuel atmosphere. Combustion experiments of Datong
bituminous coal were carried out in a wire mesh reactor at heating rates of 1 K/s, 10 K/s and 1000 K/s respectively
under air and O2/CO2 atmosphere conditions in order to investigate
the volatile emission characteristic. The concentrations of volatile (mainly CO
and CH4) emission were on-line measured by infrared gas analyzer. It
was indicated that the concentrations of CO and CH4 in O2/CO2 atmosphere were higher than those in air. The direct oxidation of carbon and gasification
reaction between carbon and CO2 are the main causes of the
increased amount of CO. The higher concentration of CO2 also results
in the increased amount of CH4 in O2/CO2 conditions.