Where:
Rc = Coke burn-off rate, kg/hr (lb/hr);
Qr = Volumetric flow rate of exhaust gas from catalyst regenerator before adding air or gas streams. Example: You may measure upstream or downstream of an electrostatic precipitator, but you must measure upstream of a carbon monoxide boiler, dscm/min (dscf/min). You may use the alternative in either § 63.1573(a)(1) or (2) , as applicable, to calculate Qr;
Qa = Volumetric flow rate of air to catalytic cracking unit catalyst regenerator, as determined from instruments in the catalytic cracking unit control room, 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);
%O2 = Oxygen concentration in regenerator exhaust, percent by volume (dry basis);
K1 = Material balance and conversion factor, 0.2982 (kg-min)/(hr-dscm-%) (0.0186 (lb-min)/(hr-dscf-%));
K2 = Material balance and conversion factor, 2.088 (kg-min)/(hr-dscm) (0.1303 (lb-min)/(hr-dscf));
K3 = Material balance and conversion factor, 0.0994 (kg-min)/(hr-dscm-%) (0.0062 (lb-min)/(hr-dscf-%));
Qoxy = Volumetric flow rate of oxygen-enriched air stream to regenerator, as determined from instruments in the catalytic cracking unit control room, dscm/min (dscf/min); and
%Oxy = Oxygen concentration in oxygen-enriched air stream, percent by volume (dry basis).
Where:
E = Emission rate of PM, kg/1,000 kg (lb/1,000 lb) of coke burn-off;
Cs = Concentration of PM, g/dscm (lb/dscf);
Qsd = Volumetric flow rate of the catalytic cracking unit catalyst regenerator flue gas as measured by Method 2 in appendix A-1 to part 60 of this chapter, dscm/hr (dscf/hr);
Rc = Coke burn-off rate, kg coke/hr (1,000 lb coke/hr); and
K = Conversion factor, 1.0 (kg2/g)/(1,000 kg) (1,000 lb/(1,000 lb)).
Where:
Es = Emission rate of PM allowed, kg/1,000 kg (1b/1,000 lb) of coke burn-off in catalyst regenerator;
1.0 = Emission limitation, kg coke/1,000 kg (lb coke/1,000 lb);
A = Allowable incremental rate of PM emissions. Before August 1, 2017, A = 0.18 g/million cal (0.10 lb/million Btu). On or after August 1, 2017, A = 0 g/million cal (0 lb/million Btu);
H = Heat input rate from solid or liquid fossil fuel, million cal/hr (million Btu/hr). Make sure your permitting authority approves procedures for determining the heat input rate;
Rc = Coke burn-off rate, kg coke/hr (1,000 lb coke/hr) determined using Equation 1 of this section; and
K' = Conversion factor to units to standard, 1.0 (kg2/g)/(1,000 kg) (103 lb/(1,000 lb)).
Where:
Opacity Limit = Maximum permissible hourly average opacity, percent, or 10 percent, whichever is greater;
Opacityst = Hourly average opacity measured during the source test, percent; and
PMEmRst = PM emission rate measured during the source test, lb/1,000 lb coke burn.
Where:
ENi1 = Mass emission rate of Ni, mg/hr (lb/hr); and
CNi = Ni concentration in the catalytic cracking unit catalyst regenerator flue gas as measured by Method 29 in appendix A to part 60 of this chapter, mg/dscm (lbs/dscf).
Where:
Opacityl = Opacity value for use in Equation 7 of this section, percent, or 10 percent, whichever is greater; and
NiEmR1st = Average Ni emission rate calculated as the arithmetic average Ni emission rate using Equation 5 of this section for each of the performance test runs, g Ni/hr.
Where:
Ni operating limit1 = Maximum permissible hourly average Ni operating limit, percent-acfm-ppmw, i.e., your site-specific Ni operating limit;
Qmon,st = Hourly average actual gas flow rate as measured by the continuous parameter monitoring system during the performance test or using the alternative procedure in § 63.1573 , acfm; and
E-Catst = Ni concentration on equilibrium catalyst measured during source test, ppmw.
Where:
ENi2 = Normalized mass emission rate of Ni, mg/kg coke (lb/1,000 lb coke).
Where:
Opacity2 = Opacity value for use in Equation 10 of this section, percent, or 10 percent, whichever is greater; and
NiEmR2st = Average Ni emission rate calculated as the arithmetic average Ni emission rate using Equation 8 of this section for each of the performance test runs, mg/kg coke.
Where:
Ni Operating Limit2 = Maximum permissible hourly average Ni operating limit, percent-ppmw-acfm-hr/kg coke, i.e., your site-specific Ni operating limit; and
Rc,st = Coke burn rate from Equation 1 of this section, as measured during the initial performance test, kg coke/hr.
Where:
Ni operating value1 = Maximum permissible hourly average Ni standard operating value, %-acfm-ppmw;
Opacity = Hourly average opacity, percent;
Qmon = Hourly average actual gas flow rate as measured by continuous parameter monitoring system or calculated by alternative procedure in § 63.1573 , acfm; and
E-Cat = Ni concentration on equilibrium catalyst from weekly or more recent measurement, ppmw.
Where:
Ni operating value2 = Maximum permissible hourly average Ni standard operating value, percent-acfm-ppmw-hr/kg coke.
40 C.F.R. §63.1564