For this problem, the acid gas is 99.0 mol% methane (CH4) and 1.0 mol% H2S will be treated with a porous adsorbent material of void fraction 0.50 at 30 °C and 15 atm total system pressure. To design the gas adsorption bed, the effective diffusion coefficient of hydrogen sulfide within the porous adsorbent within the adsorbent. a) What is the molar concentration (moles/m³) of H₂S in the gas mixture? b) Estimate the binary gas phase diffusion coefficient of hydrogen sulfide in methane by two different methods as described in the WRF textbook. Do the methods give equivalent predictions? If not, is there a basis for choosing one as being more accurate than the other? c) Estimate the effective diffusion coefficient of the gas in porous particle, assuming a particle tortuosity of 3. Note: The Lennard-Jones parameters for H2S are σ = 3.623 A and ε/к = 301.1 K.

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
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For this problem, the acid gas is 99.0 mol% methane (CH4) and 1.0 mol% H2S will be treated with a porous adsorbent
material of void fraction 0.50 at 30 °C and 15 atm total system pressure. To design the gas adsorption bed, the
effective diffusion coefficient of hydrogen sulfide within the porous adsorbent within the adsorbent.
a) What is the molar concentration (moles/m³) of H2S in the gas mixture?
b) Estimate the binary gas phase diffusion coefficient of hydrogen sulfide in methane by two different methods as
described in the WRF textbook. Do the methods give equivalent predictions? If not, is there a basis for choosing
one as being more accurate than the other?
c) Estimate the effective diffusion coefficient of the gas in porous particle, assuming a particle tortuosity of 3.
Note: The Lennard-Jones parameters for H2S are σ = 3.623 A and ɛ/к = 301.1 K.
Transcribed Image Text:For this problem, the acid gas is 99.0 mol% methane (CH4) and 1.0 mol% H2S will be treated with a porous adsorbent material of void fraction 0.50 at 30 °C and 15 atm total system pressure. To design the gas adsorption bed, the effective diffusion coefficient of hydrogen sulfide within the porous adsorbent within the adsorbent. a) What is the molar concentration (moles/m³) of H2S in the gas mixture? b) Estimate the binary gas phase diffusion coefficient of hydrogen sulfide in methane by two different methods as described in the WRF textbook. Do the methods give equivalent predictions? If not, is there a basis for choosing one as being more accurate than the other? c) Estimate the effective diffusion coefficient of the gas in porous particle, assuming a particle tortuosity of 3. Note: The Lennard-Jones parameters for H2S are σ = 3.623 A and ɛ/к = 301.1 K.
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