Propane (C3H8) is burned with 15% excess air. The conversion of the limiting reactant is 100%. The product streams contains 3 moles of CO₂ for each mole of CO. Propane and air are fed at 25°C at 1 atm. The product stream leaves at 800°C. Determine the amount of heat that must be removed per mole of propane fed (kJ/mole).
Propane (C3H8) is burned with 15% excess air. The conversion of the limiting reactant is 100%. The product streams contains 3 moles of CO₂ for each mole of CO. Propane and air are fed at 25°C at 1 atm. The product stream leaves at 800°C. Determine the amount of heat that must be removed per mole of propane fed (kJ/mole).
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:**Propane (C₃H₈) Combustion Problem**
**Problem Statement:**
Propane (C₃H₈) is burned with 15% excess air. The conversion of the limiting reactant is 100%. The product streams contain 3 moles of CO₂ for each mole of CO. Propane and air are fed at 25°C at 1 atm. The product stream leaves at 800°C.
**Objective:**
Determine the amount of heat that must be removed per mole of propane fed (kJ/mole).
---
In this problem, we are analyzing the combustion of propane with excess air and determining the amount of heat that needs to be removed. The given conditions are:
1. **Combustion Reaction:** Propane (C₃H₈) is the fuel being burned.
2. **Excess Air:** 15% more air than the stoichiometric requirement.
3. **Complete Conversion:** The limiting reactant (propane) is converted completely.
4. **Product Stream Composition:** The molar ratio of CO₂ to CO is 3:1.
5. **Feed Conditions:** Propane and air are fed at 25°C and 1 atm.
6. **Product Conditions:** The product stream exits at 800°C.
---
To solve this problem, we need to:
1. **Write the balanced combustion reaction.**
2. **Calculate the stoichiometric air required.**
3. **Determine the heat of reaction.**
4. **Calculate the specific heat capacities of the products.**
5. **Compute the energy balance considering the temperature change from 25°C to 800°C.**
6. **Find the heat removed per mole of propane.**
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