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2. Combustion of fuels with air at high temperatures can produce nitrogen/ox (NOx) as unwanted by products. Because these compounds are pollutants, they and one process for doing so is called selective catalytic reduction (SCR). A res have developed a new SCR catalyst that uses ammonia (NH3) as a reactant to nitrogen and water via the reaction:

2. Combustion of fuels with air at high temperatures can produce nitrogen/ox (NOx) as unwanted by products. Because these compounds are pollutants, they and one process for doing so is called selective catalytic reduction (SCR). A res have developed a new SCR catalyst that uses ammonia (NH3) as a reactant to nitrogen and water via the reaction:

Introduction to Chemical Engineering Thermodynamics
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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2. Combustion of fuels with air at high temperatures can produce nitrogen/oxygen compounds (NOx) as unwanted by products. Because these compounds are pollutants, they must be removed, and one process for doing so is called selective catalytic reduction (SCR). A researcher claims to have developed a new SCR catalyst that uses ammonia (NH3) as a reactant to convert NO into nitrogen and water via the reaction: 6NO(g) + 4NH3(g) ---> 5N₂(g) + 6H₂O(g) We are working on the design for a process using this reaction in which 120 mol/hr of an equimolar mixture of NO and NH3 (i.e., 60 mol/hr NO and 60 mol/hr NH3) at 450°C is fed to the reactor. We may assume that the reaction goes to completion in the limiting reactant. The reactor is jacketed to maintain the temperature at 450°C, and we may assume that the pressure is held constant at 1 Atm. Use the following constant heat capacities for the gases: (a) (b) I (c) [ Species NO (g) NH3(g) N₂ (g) H₂O (g) Cp (J/mol K) 30.5 37.0 29.1 34.2 Determine the composition (species molar flow rates) of the product stream. Determine the standard enthalpy change for the reaction at 298K (AÃ298). Determine the rate at which heat must be added to or removed from the reactor.
Transcribed Image Text:2. Combustion of fuels with air at high temperatures can produce nitrogen/oxygen compounds (NOx) as unwanted by products. Because these compounds are pollutants, they must be removed, and one process for doing so is called selective catalytic reduction (SCR). A researcher claims to have developed a new SCR catalyst that uses ammonia (NH3) as a reactant to convert NO into nitrogen and water via the reaction: 6NO(g) + 4NH3(g) ---> 5N₂(g) + 6H₂O(g) We are working on the design for a process using this reaction in which 120 mol/hr of an equimolar mixture of NO and NH3 (i.e., 60 mol/hr NO and 60 mol/hr NH3) at 450°C is fed to the reactor. We may assume that the reaction goes to completion in the limiting reactant. The reactor is jacketed to maintain the temperature at 450°C, and we may assume that the pressure is held constant at 1 Atm. Use the following constant heat capacities for the gases: (a) (b) I (c) [ Species NO (g) NH3(g) N₂ (g) H₂O (g) Cp (J/mol K) 30.5 37.0 29.1 34.2 Determine the composition (species molar flow rates) of the product stream. Determine the standard enthalpy change for the reaction at 298K (AÃ298). Determine the rate at which heat must be added to or removed from the reactor.
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