PEAK FLAMMABILITY LIMITS OF HYDROGEN-SULFIDE, CARBON-DIOXIDE, AND AIR FOR UPWARD PROPAGATION

The minimum concentrations of carbon dioxide, to prevent the combustion of any concentration of hydrogen sulfide in air, called the peak concentration, have been determined at 20, 100, and 150 °C. They are 34.9 ± 0.2, 40.2 ± 0.6, and 40.7 ± 0.8% carbon dioxide in air, respectively. The effects of carbon dioxide have been shown to be purely thermal up to stoichiometry. For fuel-rich mixtures, however, the carbon dioxide also acts as a weak oxidant. © 1979, American Chemical Society. All rights reserved.