Development of Process for Combined NO/sub X//SO/sub X/ Control. Technical Progress Report, October 1984

摘要

Testing of the copper-exchanged adsorbent was continued. Operating variables for both the adsorption and regeneration cycles were studied. The specific operating conditions were examined and a summary of their effects are described. The temperature of the feed gas and adsorbent beds was lowered to 350 exp 0 C. The SO sub 2 loading capacity of the adsorbent dropped slightly; about 5% compared with adsorption at 400 exp 0 C. The NO/sub x/ destruction reaction efficiency was also reduced at the lower temperature to less than 80% from an average destruction efficiency in the 80 to 90% range with an operating temperature of 400 exp 0 C. The face velocity of the adsorbing gas was varied from about 100 to 300 ft/min (actual) in the adsorption beds. In general, the SO sub 2 adsorption capacity increases with decreasing face velocity, but quantitative data were not obtained. In addition to these tests, a longer-term test was conducted in which 17 adsorption-regeneration cycles were performed with each adsorption bed using the same adsorption-desorption conditions. At the beginning of this test, the adsorption times for Column A were about 90 minutes and about 100 minutes for Column B. At the completion of the test, about 48 hours later, the adsorption times were 68 minutes for Column A and 70 minutes for Column B. Thus, the adsorption capacities for both beds slowly decreased, 1 or 2% per cycle. (ERA citation 10:006309)