Chemistry: analytical and immunological testing – Testing of catalyst
Reexamination Certificate
2005-04-21
2009-12-22
Soderquist, Arlen (Department: 1797)
Chemistry: analytical and immunological testing
Testing of catalyst
C060S274000, C060S276000, C422S110000, C422S111000, C422S130000, C422S171000, C422S172000, C436S106000, C436S113000, C436S116000, C436S117000, C436S118000, C436S127000, C436S136000, C436S159000
Reexamination Certificate
active
07635593
ABSTRACT:
Localized catalyst activity in an SCR unit for controlling emissions from a boiler, power plant, or any facility that generates NOx-containing flue gases is monitored by one or more modules that operate on-line without disrupting the normal operation of the facility. Each module is positioned over a designated lateral area of one of the catalyst beds in the SCR unit, and supplies ammonia, urea, or other suitable reductant to the catalyst in the designated area at a rate that produces an excess of the reductant over NOxon a molar basis through the designated area. Sampling probes upstream and downstream of the designated area draw samples of the gas stream for NOxanalysis, and the catalyst activity is determined from the difference in NOxlevels between the two probes.
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Muzio Lawrence J.
Smith Randall A.
Fossil Energy Research Corp. (FERCO)
Heines M. Henry
Soderquist Arlen
Townsend and Townsend and Crew LLP.
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