Solid-phase Oxidation Research Articles

Nitrogen oxides (NOx) influence on sulfite oxidation and scaling in lime/limestone flue gas desulfurization (FGD) systems

Experiments were conducted to determine the influence of nitrogen oxides on the solid phase oxidation of sulfite to sulfate in slaked lime slurries from lime/limestone scrubbing systems. Nitric oxide is observed to act as an inhibitor and nitrogen dioxide as a promoter of the oxidation of sulfite. Nitric oxide present at the same concentration as nitrogen dioxide is unable to inhibit the oxidative influence of the latter. At a mole ratio of 12:1, the promotive action of nitrogen dioxide is offset, and the total oxidation is no greater than it would be without the presence of nitric oxide. Oxidation inhibition merits consideration as a way to avoid sulfate scaling in such scrubbing systems. (1 diagram, 1 graph, 6 references, 1 tables)

Kinetic parameters of solid phase oxidation of polypropylene inhibited by 2,4,6-tri-tert.butylphenol

Kinetic parameters were derived for low temperature solid phase oxidation of PP inhibited by 2,4,6-tri-tert.butylphenol. An analysis was made of the effect of reaction (−7) on kinetics of oxidation of polyolefins (hydrocarbons) inhibited by phenols subject to steric hindrance.