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Pulverized coal pellets, which may be approximated as carbon spheres of radius r, = 1 mm, are burned in a pure oxygen atmosphere at 1450 K and 1 atm. Oxygen is transferred to the particle surface by diffusion, where it is consumed in the reaction C+O2→CO2. The reaction rate is first order and of the form Nő, = -k"Co,(r,), where k = 0.1 m/s. Neglecting changes in r, determine the steady-state O, molar consumption rate in kmol/s. At 1450 K, the binary diffusion coefficient for 0, and CO, is 1.71 × 10ªm²/s. %3D

Pulverized coal pellets, which may be approximated as carbon spheres of radius r, = 1 mm, are burned in a pure oxygen atmosphere at 1450 K and 1 atm. Oxygen is transferred to the particle surface by diffusion, where it is consumed in the reaction C+O2→CO2. The reaction rate is first order and of the form Nő, = -k"Co,(r,), where k = 0.1 m/s. Neglecting changes in r, determine the steady-state O, molar consumption rate in kmol/s. At 1450 K, the binary diffusion coefficient for 0, and CO, is 1.71 × 10ªm²/s. %3D

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
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14.32 Pulverized coal pellets, which may be approximated as carbon spheres of radius r,=1 mm, are burned in a pure oxygen atmosphere at 1450 K and 1 atm. Oxygen is transferred to the particle surface by diffusion, where it is consumed in the reaction C+O2→CO2. The reaction rate is first order and of the form Nő, = -k{Co,(r.), where k'= 0.1 m/s. Neglecting changes in r,, determine the steady-state O, molar consumption rate in kmol/s. At 1450 K, the binary diffusion coefficient for O, and CO, is 1.71 × 10ª m²/s.
Transcribed Image Text:14.32 Pulverized coal pellets, which may be approximated as carbon spheres of radius r,=1 mm, are burned in a pure oxygen atmosphere at 1450 K and 1 atm. Oxygen is transferred to the particle surface by diffusion, where it is consumed in the reaction C+O2→CO2. The reaction rate is first order and of the form Nő, = -k{Co,(r.), where k'= 0.1 m/s. Neglecting changes in r,, determine the steady-state O, molar consumption rate in kmol/s. At 1450 K, the binary diffusion coefficient for O, and CO, is 1.71 × 10ª m²/s.
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