Trace Species in Combustion Gases: The Formation of Sodium Metaborate
Abstract
The equilibrium constant for the reaction NaCl(g) + HBO2(g) = NaBO2(g) + HCl(g) is determined to be, Kp = 2.50 (1980 deg K). Sodium vapor and boron trichloride (BCl3) are reacted in a hydrocarbon-air flame contained in a tunnel burner. Conditions are such that the concentrations of HBO2 and HCl are equal to the total flows of boron and chlorine. The concentration of unreacted sodium is found by line absorption, using an experimentally determined absorption coefficient. The relative contribution of NaCl and NaBO2 to the chemically combined sodium concentration can be assessed by removing the direction proportionality between chlorine and boron flows. This is done by adding chlorine, beyond that present in the BCl3. The H-atom concentration is also required, and is inferred from the intensity of the 2pi to 2sigma(0,0) OH-band.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1964
- Accession Number
- AD0619492
Entities
People
- David Fleischer