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To edit an existing Catalytic Cracking, Fluid Coking, or Catalytic Reforming Unit, click on the edit icon or the Name/ID link, which is the first column in the CATALYTIC CRACKING AND COKING UNIT-LEVEL UNITS, TRADITIONAL FLUID COKING UNITS, FLUID COKING UNITS WITH FLEXICOKING DESIGN, AND CATALYTIC REFORMING UNITS EMISSIONS SUMMARY table.

To delete an existing Catalytic Cracking, Fluid Coking, or Catalytic Reforming Unit, click on the delete icon, which is the last column in the CATALYTIC CRACKING UNITS, TRADITIONAL FLUID COKING UNITS, FLUID COKING UNITS WITH FLEXICOKING DESIGN, AND CATALYTIC REFORMING UNITS EMISSIONS SUMMARY table.

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• A unique name or identifier, plus optional description for this unit (see also About Unique Unit Names)
• Specify the type of unit:
  • Fluid Catalytic Cracking Unit
  • Thermal Catalytic Cracking Unit
  • Traditional Fluid Coking Unit
  • Catalytic Reforming Unit (see note below)
  • Fluid Coking Unit with Flexicoking Design (see note below)
• For each unit, answer the following question: Do you operate and maintain a CEMS that measures CO₂ emissions according to subpart C? This means that both a flow meter and a concentration monitor need to be installed. If so, you must use the CEMS methodology for measuring CO₂ emissions from this unit. Click either Yes or No.

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For

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For Fluid Coking Units with Flexicoking Design, you will be asked if the GHG emissions from the low heat value gas are accounted for in Subpart C.

Fluid Coking Units with Flexicoking Design, you will be asked if the GHG emissions from the low heat value gas are accounted for in Subpart C.

• If your

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• answer to this question is 'yes', you are only required to report maximum rated throughput of the fluid coking unit with flexicoking design
• If your answer to this question is 'no', you are required to report maximum rated throughput of the fluid coking unit with flexicoking design and the methods used to calculate emissions per the sections below

When you are finished entering the required information, click NEXT.

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When you are finished entering the required information, click SAVE.

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click SAVE.

Adding or Updating Catalytic Cracking or Coking Unit Emissions Information

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The annual CO₂ emission rate from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-6 spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of CO₂ calculated by the spreadsheet to this page in the box next to "Annual CO₂ emission from this unit type unit (metric tons)."

Subpart Y also collects the following CO₂ emission data:

• Annual average flow rate of exhaust gas (dscfh)
• Manufacturer's recommended method used for annual average flow rate of exhaust gas
• Number of hours missing data procedures were used for annual average flow rate of exhaust gas (hours)
• Annual average percent CO₂ in exhaust gas stream (percent by volume - dry basis; 0 ? x ? 100)
• Manufacturer's recommended method used for annual average percent CO₂ in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent CO₂ in exhaust gas stream (hours)
• Annual average percent CO in exhaust gas stream (percent by volume - dry basis; 0 ? x ? 100)
• Manufacturer's recommended method used for annual average percent CO in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent CO in exhaust gas stream (hours)

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CO₂ Emissions Calculation: 98.253(c)(2) – Equation Y-6 and Y-7a

The annual CO₂ emission rate emissions from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-6 and Y-7a spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of CO₂ calculated by the spreadsheet to this page in the box next to "Annual CO₂ emission from this unit type unit (metric tons)."

The Equation Y-6 and Y-7a Summaries are presented on the page. You can hover over an element in the equation to reveal a definition of that element.

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• Annual CO₂ emission from this unit (metric tons)
• Annual average percent CO₂ in exhaust gas stream (percent by volume - dry basis; 0 ? x ? 100)
• Describe the manufacturer's recommended method that was used for annual average percent CO₂ in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent CO₂ in exhaust gas stream (hours)
• Annual average percent CO in exhaust gas stream (percent by volume - dry basis; 0 ? x ? 100)
• Describe the manufacturer's recommended method that was used for annual average percent CO in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent CO in exhaust gas stream (hours)
• Annual average volumetric flow rate of exhaust gas from this unit prior to the combustion of other fossil fuels (dscfh)
• Annual average flow rate of inlet air (dscfh)
• Annual average flow rate of oxygen enriched air (a value of "0" may be entered if inlet air is not oxygen enriched to avoid validation errors) (dscfh)
• Annual average percent O2 O₂ in exhaust gas stream (percent by volume - dry basis; 0 ? x ? 100)
• Describe the manufacturer's recommended method that was used for annual average percent O2 O₂ in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent O2 O₂ in exhaust gas stream (hours)
• Annual average percent O2 O₂ in oxygen-enriched gas stream inlet (a value of "0" may be entered if inlet air is not oxygen enriched to avoid validation errors) (percent by volume - dry basis; 0 ? x ? 100)

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CO₂ Emissions Calculation: 98.253(c)(2) – Equation Y-6 and Y-7b

The annual CO₂ emission rate emissions from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-6 and Y-7b spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of CO₂ calculated by the spreadsheet to this page in the box next to "Annual CO₂ emission from this unit type unit (metric tons)."

Subpart Y also collects the following CO₂ emission data:

Annual CO₂ emission from this

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unit type unit (metric tons)."

Subpart Y also collects the following CO₂ emission data:

• Annual CO₂ emission from this unit (metric tons
• Annual average percent CO₂ in exhaust gas stream (percent by volume - dry basis; 0 < x < 100)
• Describe the manufacturer's recommended method that was used for annual average percent CO₂ in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent CO₂ in exhaust gas stream (hours)
• Annual average percent CO₂ in exhaust gas stream (percent by volume - dry basis; 0 < ? x < ? 100)
• Describe the manufacturer's recommended method that was used for annual average percent CO in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent CO in exhaust gas stream (hours)
• Annual average volumetric flow rate of exhaust gas from this fluid catalytic cracking unit prior to the combustion of other fossil fuels (dscfh)
• Annual average flow rate of inlet air (dscfh)
• ₂ in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent CO₂ in exhaust gas stream (hoursAnnual average flow rate of oxygen enriched air (a value of "0" may be entered if inlet air is not oxygen enriched to avoid validation errors) (dscfh)
• Annual average percent N₂ CO in exhaust gas stream (percent by volume - dry basis; 0 < ? x < 100)
• Describe the method that was used to measure annual average percent N₂ in exhaust gas stream:
  • Method 18 at 50 CFR part 60, appendix A-6
  • ASTM D1945-03
  • ASTM D1946-90-Reapproved 2006
  • GPA 2261-00
  • UOP539-97
  • ASTM D2503-92-Reapproved 2007
  • Chromatographic analysis: manufacturer's instructions
  • Maximum N₂ impurity specification
  • Other (specify)
• ? 100)
• Describe the manufacturer's recommended method that was used for annual average percent CO in exhaust gas stream
• Number of hours missing data procedures were used for annual average percent N₂ in exhaust gas stream (hours)used for annual average percent CO in exhaust gas stream (hours)
• Annual average volumetric flow rate of exhaust gas from this unit prior to the combustion of other fossil fuels (dscfh)
• Annual average flow rate of inlet air (dscfh)
• Annual average flow rate of oxygen enriched air Annual average percent N₂ in oxygen-enriched gas stream inlet (a value of "0" may be entered if inlet air is not oxygen enriched to avoid validation errors) (dscfh)
• Annual average percent N₂ in exhaust gas stream (percent by volume - dry basis; 0 < ? x < ? 100)
• Describe the method that was used to measure annual average percent N₂ in oxygen-enriched exhaust gas stream inlet:
  • Method 18 at 50 CFR part 60, appendix A-6
  • ASTM D1945-03
  • ASTM D1946-90-Reapproved 2006
  • GPA 2261-00
  • UOP539-97
  • ASTM D2503-92-Reapproved 2007
  • Chromatographic analysis: manufacturer's instructions
  • Maximum N₂ impurity specification
  • Other (specify)
• Number of hours missing data procedures were used for annual average percent N₂ in exhaust gas stream (hours)
• Annual were used for annual average percent N₂ in oxygen-enriched gas stream inlet (a value of "0" may be entered if inlet air is not oxygen enriched to avoid validation errors) (hours)

The Equation Y-6 and Y-7b Summaries are presented in the screenshot below. You can hover over an element in the equation to reveal a definition of that element.

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CO₂ Emissions Calculation: 98.253(c)(3) – Equation Y-8

The annual CO₂ emission rate from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-8 spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of CO₂ calculated by the spreadsheet to this page in the box next to "Annual CO₂ emission from this unit type unit (metric tons)."

For this method, Subpart Y also collects the basis for the carbon content value:

• Weekly or more frequent measurements
• Periodic (less frequent than weekly but at least quarterly) measurements
• Semi-annual or annual measurements
• Historical measurement value
• Engineering estimate
• Default value
• Other

The Equation Y-8 Summary is presented in the screenshot below. You can hover over an element in the equation to reveal a definition of that element

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CO₂ Emissions Calculation: 98.253(c)(3) - Equation Y-11

The annual CO₂ emission rate from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-11 spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of CO₂ calculated by the spreadsheet to this page in the box next to "Annual CO₂ emission from this unit type unit (metric tons)."

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• percent by volume - dry basis; 0 ? x ? 100)
• Describe the method that was used to measure annual average percent N₂ in oxygen-enriched gas stream inlet:
  • Method 18 at 50 CFR part 60, appendix A-6
  • ASTM D1945-03
  • ASTM D1946-90-Reapproved 2006
  • GPA 2261-00
  • UOP539-97
  • ASTM D2503-92-Reapproved 2007
  • Chromatographic analysis: manufacturer's instructions
  • Maximum N₂ impurity specification
  • Other (specify)
• Number of hours missing data procedures were used for annual average percent N₂ in oxygen-enriched gas stream inlet (a value of "0" may be entered if inlet air is not oxygen enriched to avoid validation errors) (hours)

The Equation Y-6 and Y-7b Summaries are presented in the screenshot below. You can hover over an element in the equation to reveal a definition of that element.

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CO₂ Emissions Calculation: 98.253(c)(3) – Equation Y-8

The annual CO₂ emissions from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-8 spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of CO₂ calculated by the spreadsheet to this page in the box next to "Annual CO₂ emission from this unit type unit (metric tons)."

For this method, Subpart Y also collects the basis for the carbon content value:

• Weekly or more frequent measurements
• Periodic (less frequent than weekly but at least quarterly) measurements
• Semi-annual or annual measurements
• Historical measurement value
• Engineering estimate
• Default value
• Other (specify)

The Equation Y-8 Summary is presented in the screenshot below. You can hover over an element in the equation to reveal a definition of that element

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CO₂ Emissions Calculation: 98.253(c)(3) - Equation Y-11

The annual CO₂ emissions from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-11 spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of CO₂ calculated by the spreadsheet to this page in the box next to "Annual CO₂ emission from this catalytic reforming unit (metric tons)."

For this method, Subpart Y also collects the total number of regeneration cycles or measurement periods, as well as the average coke burn-off quantity per cycle or measurement period.

The Equation Y-11 Summary is presented in the screenshot below. You can hover over an element in the equation to reveal a definition of that element.

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CH₄ Emissions Calculation: Equation Y-9

The annual CH₄ emission rate emissions from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-9 spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of CH₄ calculated by the spreadsheet to this page in the box next to "Annual CH₄ emission from this unit type unit (metric tons)."

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N₂O Emissions Calculation: Equation Y-10

The annual N₂O emission rate emissions from the unit operations is required. To calculate this value download the spreadsheet by clicking the link titled "Use Y-10 spreadsheet to calculate." Fill in the spreadsheet using the instructions in the spreadsheet. After completing the spreadsheet, copy the value of N₂O calculated by the spreadsheet to this page in the box next to "Annual N₂O emission from this unit type unit (metric tons)."

The Equation Y-10 Summary is presented in the screenshot below. You can hover over an element in the equation to reveal a definition of that element.

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