Where
Qgas = Hourly average actual gas flow rate, acfm;
1.12 = Default correction factor to convert gas flow from dry standard cubic feet per minute (dscfm) to standard cubic feet per minute (scfm);
Qair = Volumetric flow rate of air to regenerator, as determined from the control room instrumentations, dscfm;
Qother = Volumetric flow rate of other gases entering the regenerator as determined from the control room instrumentations, dscfm. (Examples of "other" gases include an oxygen-enriched air stream to catalytic cracking unit regenerators and a nitrogen stream to catalytic reforming unit regenerators.);
Tempgas = Temperature of gas stream in vent measured as near as practical to the control device or opacity monitor, °K. For wet scrubbers, temperature of gas prior to the wet scrubber; and
Pvent = Absolute pressure in the vent measured as near as practical to the control device or opacity monitor, as applicable, atm. When used to assess the gas flow rate in the final atmospheric vent stack, you can assume Pvent = 1 atm.
Where:
Qr = Volumetric flow rate of exhaust gas from the catalyst regenerator before adding air or gas streams, dscm/min (dscf/min);
79 = Default concentration of nitrogen and argon in dry air, percent by volume (dry basis);
%Oxy = Oxygen concentration in oxygen-enriched air stream, percent by volume (dry basis);
Qoxy = Volumetric flow rate of oxygen-enriched air stream to regenerator as determined from the catalytic cracking unit control room instrumentations, dscm/min (dscf/min);
%CO2 = Carbon dioxide concentration in regenerator exhaust, percent by volume (dry basis);
CO = Carbon monoxide concentration in regenerator exhaust, percent by volume (dry basis); and
%O2 = Oxygen concentration in regenerator exhaust, percent by volume (dry basis).
40 C.F.R. §63.1573