Removal of paramagnetic gases

Abstract

Abstract IN REMOVING A PARAMAGNETIC GAS SUCH AS O2, NO, NO2, CIO2 AND O3 FROM A GAS STREAM CONTAINING THE SAME, THE GAS TO BE PURIFIED IS PASSED OVER FINELY DIVIDED COPPER REACTANT IMPREGNATED ON A HIGH SURFACE AREA GAMMA-ALUMINA. THE GAMMA-ALUMINA ESSENTIALLY CONTAINS FROM ABOUT 0.1 TO 1.5 PERCENT BY WEIGHT OF SODIUM OXIDE WITHIN THE ALUMINA CRYSTALS. THE COPPER REACTANT MAY CONTAIN UP TO 45 PERCENT BY WEIGHT OF A METAL SUCH AS SILVER, PLATINUM, PALLADIUM, MANGANESE, NICKEL, COBALT, CHROMIUM, MOLYBDENUM, AND MIXTURES THEREOF. THE GAS IS PASSED OVER THE PREPARED REDUCED REAGENT WITHIN AN ENCLOSED ZONE WHILE THE GAS AND THE REAGENT ARE AT MOST ANY TEMPERATURE ABOVE ABOUT -200* C. REMOVAL OF PARAMAGNETIC GAS IS PARTICULARLY EFFECTIVE EVEN AT SUBSTANTIAL FLOW RATES AND EFFICIENCY OF REMOVAL REMAINS SURPRISINGLY HIGH UNTIL THE REDUCED METAL OF THE REAGENT HAS SUBSTANTIALLY REACTED WITH THE PARAMAGNETIC GAS. WHEN REMOVAL EFFICIENCY DROPS, THE FLOW OF GAS TO BE PURIFIED IS STOPPED OR DIRECTED TO ANOTHER BED OF REAGENT WHILE THE FIRST BED IS REGENERATED BY REDUCTION WITH HYDROGEN GAS AT AN ELEVATED TEMPERATURE.

Inventors

• 👤 Ludo K Frevel
• 👤 Leonard J Kressley

Bibliographic Details