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10.88 In the fixation of nitrogen by the arc process, air is passed through an electric arc. Some of the nitrogen is oxidized to NO which on cooling is oxidized to NO₂. Of the NO₂ formed, 66% will get associated to N₂O4 at 300 K. The gases are then passed into absorption towers where HNO3 is formed by the following reaction: H₂O + 3NO₂ →→ NO + 2HNO3 The NO liberated in this reaction will be reoxidized in part and form more nitric acid. In the operation of such a plant, it is found possible to produce gases from the arc furnace in which the nitric oxide is 2% by volume while hot. The gases are cooled to 300 K at a pressure of 1.013 bar before being sent to the absorber. Calculate the following: (a) The complete analysis by volume of the hot gases leaving the furnace assuming that the air entering the furnace was of average composition (b) The partial pressures of NO₂ and N₂O4 in the gases entering the absorption tower (c) The weight of HNO3 formed by 1000 m³ of gas entering the absorption system if the conversion to HNO3 of the combined N₂ in the furnace gases is 85% complete

10.88 In the fixation of nitrogen by the arc process, air is passed through an electric arc. Some of the nitrogen is oxidized to NO which on cooling is oxidized to NO₂. Of the NO₂ formed, 66% will get associated to N₂O4 at 300 K. The gases are then passed into absorption towers where HNO3 is formed by the following reaction: H₂O + 3NO₂ →→ NO + 2HNO3 The NO liberated in this reaction will be reoxidized in part and form more nitric acid. In the operation of such a plant, it is found possible to produce gases from the arc furnace in which the nitric oxide is 2% by volume while hot. The gases are cooled to 300 K at a pressure of 1.013 bar before being sent to the absorber. Calculate the following: (a) The complete analysis by volume of the hot gases leaving the furnace assuming that the air entering the furnace was of average composition (b) The partial pressures of NO₂ and N₂O4 in the gases entering the absorption tower (c) The weight of HNO3 formed by 1000 m³ of gas entering the absorption system if the conversion to HNO3 of the combined N₂ in the furnace gases is 85% complete

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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10.88 In the fixation of nitrogen by the arc process, air is passed through an electric arc. Some of the nitrogen is oxidized to NO which on cooling is oxidized to NO,. Of the NO, formed, 66% will get associated to N,O4 at 300 K. The gases are then passed into absorption towers where HNO, is formed by the following reaction: H,O + 3NO, → NO + 2HNO, The NO liberated in this reaction will be reoxidized in part and form more nitric acid. In the operation of such a plant, it is found possible to produce gases from the arc furnace in which the nitric oxide is 2% by volume while hot. The gases are cooled to 300 K at a pressure of 1.013 bar before being sent to the absorber. Calculate the following: (a) The complete analysis by volume of the hot gases leaving the furnace assuming that the air entering the furnace was of average composition (b) The partial pressures of NO, and N,O4 in the gases entering the absorption tower (c) The weight of HNO, formed by 1000 m3 of gas entering the absorption system if the conversion to HNO; of the combined N2 in the furnace gases is 85% complete
Transcribed Image Text:10.88 In the fixation of nitrogen by the arc process, air is passed through an electric arc. Some of the nitrogen is oxidized to NO which on cooling is oxidized to NO,. Of the NO, formed, 66% will get associated to N,O4 at 300 K. The gases are then passed into absorption towers where HNO, is formed by the following reaction: H,O + 3NO, → NO + 2HNO, The NO liberated in this reaction will be reoxidized in part and form more nitric acid. In the operation of such a plant, it is found possible to produce gases from the arc furnace in which the nitric oxide is 2% by volume while hot. The gases are cooled to 300 K at a pressure of 1.013 bar before being sent to the absorber. Calculate the following: (a) The complete analysis by volume of the hot gases leaving the furnace assuming that the air entering the furnace was of average composition (b) The partial pressures of NO, and N,O4 in the gases entering the absorption tower (c) The weight of HNO, formed by 1000 m3 of gas entering the absorption system if the conversion to HNO; of the combined N2 in the furnace gases is 85% complete
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