Sulfur dioxide conversion
Abstract
Abstract A MULTI-STAGE METHOD FOR CATALYTIC CONVERSION OF SO2 TO SO2 WHICH CAN UTILIZE A HIGH CONCENTRATION OF SO2 IN THE FEED GAS AND WHICH IS CAPABILE OF PRODUCING A HIGH SO2 CONCENTRATION IN THE PRODUCT GAS IS PROVIDED. THE PROCESS INVOLVES DISTRIBUTING A PORTION OF THE FEED GAS TO EACH OF A SERIES OF CATALYTIC CONVERTERS, AND MIXING SUCH PORTION AT EACH STAGE WITH THE OFF-GAS FROM THE PRECEDING STAGE. SOME OXYGEN FOR THE PROCESS MAY BE SUPPLIED IN ADMIXTURE WITH THE FEED GAS, AND THE REMAINDER IS ADMIXED WITH THE PORTION OF FEED GAS DELIVERED TO THE FIRST CONVERTER STAGE. THE FEED GAS AND AIR SUPPLIED TO THE FIRST STAGE, AND THE FEED GAS AND OFF-GAS SUPPLIED TO SUBSEQUENT STAGES, ARE PROPORTIONED SO THAT THE TEMPERATURE RISE OF THE GASES IN THE CONVERTER DOES NOT EXCEED THE SAFE VALUE FOR THE CATALYST. THE OFF-GAS FROM EACH STAGE IS COOLED TO NEAR THE IGNITION TEMPERATURE FOR THE CONVERSION REACTION BEFORE BEING INTRODUCED INTO THE NEXT STAGE.
Inventors
- 👤 Edward S Roberts
Bibliographic Details
Claims Analysis
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