Thermal decomposition of selected chlorinated hydrocarbons during gas combustion in fluidized bed

<p>Abstract</p> <p>Background</p> <p>The process of thermal decomposition of dichloromethane (DCM) and chlorobenzene (MCB) during the combustion in an inert, bubbling fluidized bed, supported by LPG as auxiliary fuel, have been studied. The concentration profiles of C₆H₅CI, CH₂Cl₂, CO₂, CO, NO_x, COCl₂, CHCl₃, CH₃Cl, C₂H₂, C₆H₆, CH₄ in the flue gases were specified versus mean bed temperature.</p> <p>Results</p> <p>The role of preheating of gaseous mixture in fluidized bed prior to its ignition inside bubbles was identified as important factor for increase the degree of conversion of DCM and MCB in low bed temperature, in comparison to similar process in the tubular reactor.</p> <p>Conclusions</p> <p>Taking into account possible combustion mechanisms, it was identified that autoignition in bubbles rather than flame propagation between bubbles is needed to achieve complete destruction of DCM and MCB. These condition occurs above 900°C causing the degree of conversion of chlorine compounds of 92-100%.</p

Kinetics and Mechanisms of the Oxidation of Gaseous Sulfur Compounds

The problems associated with global climate change in general, and acid rain in particular, have led to a great deal of research on the atmospheric and combustion chemistry of sulfur. Developments over the last decade have led to significant progress in our understanding of the kinetics and mechanisms of the atmospheric oxidation chemistry of natural and anthropogenic sulfur. Rather less effort, however, has been placed on developing an understanding of sulfur combustion kinetics; the emphasis of mitigation research has instead been placed on removal of sulfur from fuels or development of scrubbing techniques to remove SO2 from stack gases