Pollutant control through staged combustion of pulverized coal. Technical progress report, January--April 1978

Technical Report · Thu Jun 01 04:00:00 EDT 1978

DOI:https://doi.org/10.2172/6317260· OSTI ID:6317260

Wendt, J. O.L.; Lee, J. W.; Glass, J. W.

A 2Kg/h pulverized-fuel, plane-flame combustor was used to determine time-resolved NO profiles under fuel-rich and staged combustion conditions. Seven solid fuels, including two coal chars, were investigated. Results show that at all fuel-rich conditions NO is formed rapidly and then is slowly destroyed. The peak NO value and the rate of destruction are strong functions of coal composition and stoichiometry. Under staged combustion conditions, NO may increase or decrease at the staging point depending on the fuel and on the quantity of NO formed in the first stage. Use of artificial oxidants confirmed that the NO formed in the first and second stages consisted of fuel NO. Heterogeneous formation and reduction of NO during char combustion was modeled by a two-reaction scheme. Heterogeneous reduction was less than first order in NO and had an activation energy of 47 kcal/mole. The roles of devolatilization and homogeneous reactions are discussed in the light of the data presented.

• Research Organization: Arizona Univ., Tucson (USA). Coll. of Mines
• OSTI ID: 6317260
• Report Number(s): FE-1817-5
• Country of Publication: United States
• Language: English

Related Subjects

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& High-Temperature Chemistry
AIR POLLUTION CONTROL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL
COMBUSTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
THERMOCHEMICAL PROCESSES
YIELDS