to 360 u00b0 f catalytic ignition began but only 20 destruction of voc 39 s was accomplished an adsorption bed was prepared by firing 390 grams of pure silica gel dessicare to 500 u00b0 c for 2 hours the beads were then coated with pt by the incipient wetness method so that final pt loading was 0 15 by weight the pt coated beads were again fired to 500 u00b0 c for 30 minutes the bed was exposed to the same adsorption cycle as in example 8 the capture efficiency after 57 6 minutes on stream was calculated to be 97 6 the bed adsorbed 3 82 grams of voc and 8 54 grams of h 2 o the flow was then reduced to 10 of the adsorption flow rate and the air was heated to 360 u00b0 f at which time catalytic ignition carried the temperature higher to about 900 u00b0 f when the temperature of a thermocouple 5 inches into the bed reached 360 u00b0 f the flow was reversed the voc emissions were measured throughout the run and the destruction was measured at 93 0 a second cycle measured 99 1 capture and 92 destruction an adsorber oxidation catalyst mixed bed was prepared from 305 grams of dessicare silica gel beads previously dehydrated at.