Reduction of Sulfur Dioxide Using Microwave Discharge Techniques.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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Sulfur dioxide concentrations were reduced in a microwave discharge to investigate a possible system for industrial environmental application. An 85 watt, 2450 MHz microwave power generator and resonance cavity were used to sustain the discharge in a low pressure system. Static discharge tests were conducted with the time duration of discharge varied to determine the dependence of SO2 reduction on molecular residence time in the discharge. The reduction of pure SO2 in the discharge resulted in the formation of SO3 and elemental sulfur. The net reductions of SO2 was unacceptable for industrial applications, leading to discharge investigations of SO2 in mixtures with selected additive gases. Carbon dioxide CO2 and Ethylene C2H4 were found to be effective in improving the net reduction of SO2 in short-period 5-20 sec discharges. Ethylene acted as an oxygen scavenger. Carbon dioxide acted as an oxygen donator. Results of the investigation indicated that the reduction of SO2 concentrations by means of a microwave discharge process has possibilities for industrial applications.
- Physical Chemistry