Subpart X IVT Equation Inputs Summary

This page lists the variables used in each Inputs Verifier Tool (IVT) equation in subpart X. This information is intended primarily for XML uploaders to enable them to understand how each IVT equation is calculated and to identify sources for the constants, default values, and lookup values needed to solve the equations.

Click the links for the equations below to view the variables used in the IVT calculations:

### Equation X-1: Annual Net Contribution to Calculated Emissions from Carbon (C) in Gaseous Materials

Equation X-1 calculates the annual net contribution to calculated emissions from carbon (C) in gaseous materials, including streams containing CO2 recovered for sale or use in another process (kg/yr). The table below defines the parameters in this equation and provides the values or sources of any constants, default values, and lookup values.

Parameter

Description

Units of Measure

Value or Source

Cg

Annual net contribution to calculated emissions from carbon (C) in gaseous materials, including streams containing CO2 recovered for sale or use in another process

kg/yr

Output

(Fgf)i,n

Volume or mass of gaseous feedstock i introduced in month “n.” Note: If you measure mass, the term (MWf)i,n/MVC is replaced with “1.”

scf (if volume) or kg (if mass)

User input

(CCgf)i,n

Average carbon content of the gaseous feedstock i for month “n”

kg C per kg of feedstock

User input

(MWf)i,n

Molecular weight of gaseous feedstock i in month “n” if (Fgf)i,n is a volume*

kg/kg-mole

User input

MVC

Molar volume conversion factor factor if (Fgf)i,n or (Pgp)i,n is a volume*

scf per kg mole at 14.7 pounds per square inch absolute

849.5 @ 68°F

or

836.6 @ 60°F

(Pgp)i,n

Volume or mass of gaseous product i produced in month “n”. Note: If you measure mass, the term (MWp)i,n/MVC is replaced with “1”.

scf (if volume) or kg (if mass)

User input or 1

(CCgp)i,n

Average carbon content of gaseous product i, including streams containing CO2 recovered for sale or use in another process, for month “n”

kg C per kg of product

User input

(MWp)i,n

Molecular weight of gaseous product i in month “n” if (Pgp)i,n is a volume.*

(kg/kg-mole)

User input

j

Number of feedstocks

User input

k

Number of products

User input

* Note: A value of “1” should be used for the terms (MWf)i,n/MVC and (MWp)i,n/MVC if (Fgf)i,n or (Pgp)i,n are measured in mass, respectively.

### Equation X-2: Annual Net Contribution to Calculated Emissions from Carbon in Liquid Materials

Equation X-2 calculates the annual net contribution to calculated emissions from carbon in liquid materials, including liquid organic wastes. The table below defines the parameters in this equation and provides the values or sources of any constants, default values, and lookup values.

 Parameter Description Units of Measure Value or Source Cl Annual net contribution to calculated emissions from carbon in liquid materials, including liquid organic wastes kg/yr Output (Flf)i,n Volume or mass of liquid feedstock i introduced in month “n” gallons or kg User input (CClf)i,n Average carbon content of liquid feedstock i for month “n” kg C per gallon or kg of feedstock User input (Plp)i,n Volume or mass of liquid product i produced in month “n” gallons or kg User input (CClp)i,n Average carbon content of liquid product i, including organic liquid wastes, for month “n” kg C per gallon or kg of product User input j Number of feedstocks User input k Number of products User input

### Equation X-3: Annual Net Contribution to Calculated Emissions from Carbon in Solid Materials

Equation X-3 calculates the annual net contribution to calculated emissions from carbon in solid materials. The table below defines the parameters in this equation and provides the values or sources of any constants, default values, and lookup values.

Parameter

Description

Units of Measure

Value or Source

Cs

Annual net contribution to calculated emissions from carbon in solid materials

kg/yr

Output

(Fsf)i,n

Mass of solid feedstock i introduced in month “n”

kg

User input

(CCsf)i,n

Average carbon content of solid feedstock i for month “n”

kg C per kg of feedstock

User input

(Psp)i,n

Mass of solid product i produced in month “n”

kg

User input

(CCsp)i,n

Average carbon content of solid product i in month “n”

kg C per kg of product

User input

j

Number of feedstocks

User input

k

Number of products

User input

### Equation X-4: Annual CO2 Mass Emissions from Process Operations and Process Off-Gas Combustion

Equation X-4 calculates the annual CO2 mass emissions from process operations and process off-gas combustion. The table below defines the parameters in this equation and provides the values or sources of any constants, default values, and lookup values.

 Parameter Description Units of Measure Value or Source CO2 Annual CO2 mass emissions from process operations and process off-gas combustion metric tons/year Output 0.001 Conversion factor from kg to metric tons - 0.001 44 Molecular weight of CO2 kg/kg-mole 44 12 Atomic weight of carbon (C) kg/kg-mole 12 Cg Annual net contribution to calculated emissions from carbon (C) in gaseous materials, including streams containing CO2 recovered for sale or use in another process kg/yr Output of Eq. X-1 Cl Annual net contribution to calculated emissions from carbon in liquid materials, including liquid organic wastes kg/yr Output of Eq. X-2 Cs Annual net contribution to calculated emissions from carbon in solid materials kg/yr Output of Eq. X-3