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Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator

Solves the thermal heat balance between the exothermic catalyst regenerator and endothermic riser reactor to determine the Cat-to-Oil (CTO) circulation ratio in FCC units.

Oil preheat temperature entering riser bottom.

Cracking reaction temperature.

Hot regenerated catalyst temperature.

Calculated Result
5.9 kg/kg

Cat-to-Oil Ratio

Cat-to-Oil Ratio

5.9 kg/kg

Cat To Oil Mass Ratio C T O

5.9

Estimated F C C Conversion Percent

74.8

Catalyst Delta T Kelvin

170

Heat Delivered Per Kg Cat K J

195

5.9 — kg/kg

Calculation Breakdown

  1. Applied FormulaSolves the thermal heat balance between the exothermic catalyst regenerator and endothermic riser reactor to determine the Cat-to-Oil (CTO) circulation ratio in FCC units.m˙catCp,cat(Treg−Trot)=m˙oil[ΔHcrack+ΔHvap+Cp,oil(Trot−Tfeed)]\dot{m}_{cat} C_{p,cat} (T_{reg} - T_{rot}) = \dot{m}_{oil} \left[\Delta H_{crack} + \Delta H_{vap} + C_{p,oil}(T_{rot} - T_{feed})\right]

FCC Cat-to-Oil Ratio Metric Output

Interactive visualization based on your current inputs

Calculated Value
0.01.53.04.45.9Cat-to-Oil Ratio

What Is the Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator?

The Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator computes results using established domain formulas, verified conversion factors, and user-entered parameters.

How Does the Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator Work?

Solves the thermal heat balance between the exothermic catalyst regenerator and endothermic riser reactor to determine the Cat-to-Oil (CTO) circulation ratio in FCC units.

Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

m˙catCp,cat(Treg−Trot)=m˙oil[ΔHcrack+ΔHvap+Cp,oil(Trot−Tfeed)]\dot{m}_{cat} C_{p,cat} (T_{reg} - T_{rot}) = \dot{m}_{oil} \left[\Delta H_{crack} + \Delta H_{vap} + C_{p,oil}(T_{rot} - T_{feed})\right]

Solves the thermal heat balance between the exothermic catalyst regenerator and endothermic riser reactor to determine the Cat-to-Oil (CTO) circulation ratio in FCC units.

How to Use the Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator

  1. Enter your parameters into the designated input fields to calculate the result immediately.

Step-by-Step Example Calculation

Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator Example

Input Values:

freshFeedPreheatTempC:230.0
riserOutletTemperatureC:535.0
regeneratorDenseBedTempC:705.0
Worked Steps: Computed using the primary formula for Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator with the sample input parameters shown above.

Understanding Your Result

The calculated output gives the primary solution for Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance under the specified conditions. Use this value to compare against standard design tolerances, benchmarks, or reference ranges in biology.

Factors That Affect the Result

  • Input precision and measurement accuracy of Fresh Feed Preheat Temp T_feed (°C), Riser Outlet Temp ROT (°C), Regenerator Dense Bed Temp T_reg (°C).
  • Operating conditions, environmental parameters, and specific biology tolerances.
  • Boundary constraints and deviations from nominal theoretical model assumptions.

When Should You Use This Calculator?

  • When performing technical analysis or dimensioning related to Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance.
  • To cross-verify manual calculations or theoretical models in biology.
  • For preliminary estimates before conducting detailed field measurements or laboratory testing.

Assumptions & Limitations

  • Calculations follow internationally recognized engineering and domain standards.

Frequently Asked Questions

What happens to the FCC heat balance if feed preheat is increased?+
Higher feed preheat reduces the thermal demand on the catalyst, lowering the required Cat-to-Oil ratio; however, this reduces conversion unless riser temperature is raised.

Calculation Accuracy & Reference Note

This calculator implements verified mathematical formulas for Fluid Catalytic Cracking (FCC) Cat-to-Oil Ratio (CTO) & Heat Balance Calculator. Always verify critical results against official domain standards and manufacturer documentation.

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