Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
3. To obtain HF gas, fluorite ore (96.0 wt% CaF2 and 4.00 wt% SiO₂) can be treated with sulfuric acid to form calcium sulfate and HF: CaF₂ + H₂SO4 CaSO4 + 2HF (1) However, the HF gas formed can react with the SiO2 in the ore in an undesired side reaction: 6HF + SiO₂ → H₂SiF6 + 2H₂O (2) These reactions take place in a continuous flow reactor. The feed streams are 50.0 kg/h of fluorite ore and 80.0 kg/h of a concentrated sulfuric acid solution (93.0 wt% H₂SO4). (a) For reaction (1), what is the percent excess of the non-limiting reactant? (b) Determine the number of degrees of freedom. Show your work. (c) The percent conversion of SiO₂ is 100.0%. The selectivity of CaSO4 relative to H₂SiF6 is 9.00 mol/1.00 mol. Use atomic balances to determine the molar flow rate of the CaSO4 stream leaving the reactor and the molar flow rate of the HF gas stream leaving the reactor. (d) In a second unit, the gaseous hydrofluoric acid is bubbled through water to produce a 1.50 M solution of hydrofluoric acid. What volumetric flow rate of water is required? (Assume that the volume of HF is negligible relative to the volume of water in the solution.)

3. To obtain HF gas, fluorite ore (96.0 wt% CaF2 and 4.00 wt% SiO₂) can be treated with sulfuric acid to form calcium sulfate and HF: CaF₂ + H₂SO4 CaSO4 + 2HF (1) However, the HF gas formed can react with the SiO2 in the ore in an undesired side reaction: 6HF + SiO₂ → H₂SiF6 + 2H₂O (2) These reactions take place in a continuous flow reactor. The feed streams are 50.0 kg/h of fluorite ore and 80.0 kg/h of a concentrated sulfuric acid solution (93.0 wt% H₂SO4). (a) For reaction (1), what is the percent excess of the non-limiting reactant? (b) Determine the number of degrees of freedom. Show your work. (c) The percent conversion of SiO₂ is 100.0%. The selectivity of CaSO4 relative to H₂SiF6 is 9.00 mol/1.00 mol. Use atomic balances to determine the molar flow rate of the CaSO4 stream leaving the reactor and the molar flow rate of the HF gas stream leaving the reactor. (d) In a second unit, the gaseous hydrofluoric acid is bubbled through water to produce a 1.50 M solution of hydrofluoric acid. What volumetric flow rate of water is required? (Assume that the volume of HF is negligible relative to the volume of water in the solution.)

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
See similar textbooks
icon
Related questions
Question
3. To obtain HF gas, fluorite ore (96.0 wt% CaF2 and 4.00 wt% SiO₂) can be treated with sulfuric acid to form calcium sulfate and HF: CaF2 + H₂SO4 → CaSO4 + 2HF (1) However, the HF gas formed can react with the SiO2 in the ore in an undesired side reaction: 6HF + SiO₂ H₂SiF6 + 2H₂0 (2) These reactions take place in a continuous flow reactor. The feed streams are 50.0 kg/h of fluorite ore and 80.0 kg/h of a concentrated sulfuric acid solution (93.0 wt% H₂SO4). (a) For reaction (1), what is the percent excess of the non-limiting reactant? (b) Determine the number of degrees of freedom. Show your work. (c) The percent conversion of SiO₂ is 100.0%. The selectivity of CaSO4 relative to H₂SiF6 is 9.00 mol/1.00 mol. Use atomic balances determine the molar flow rate of the CaSO4 stream leaving the reactor and the molar flow rate of the HF gas stream leaving the reactor. (d) In a second unit, the gaseous hydrofluoric acid is bubbled through water to produce a 1.50 M solution of hydrofluoric acid. What volumetric flow rate of water is required? (Assume that the volume of HF is negligible relative to the volume of water in the solution.)
Transcribed Image Text:3. To obtain HF gas, fluorite ore (96.0 wt% CaF2 and 4.00 wt% SiO₂) can be treated with sulfuric acid to form calcium sulfate and HF: CaF2 + H₂SO4 → CaSO4 + 2HF (1) However, the HF gas formed can react with the SiO2 in the ore in an undesired side reaction: 6HF + SiO₂ H₂SiF6 + 2H₂0 (2) These reactions take place in a continuous flow reactor. The feed streams are 50.0 kg/h of fluorite ore and 80.0 kg/h of a concentrated sulfuric acid solution (93.0 wt% H₂SO4). (a) For reaction (1), what is the percent excess of the non-limiting reactant? (b) Determine the number of degrees of freedom. Show your work. (c) The percent conversion of SiO₂ is 100.0%. The selectivity of CaSO4 relative to H₂SiF6 is 9.00 mol/1.00 mol. Use atomic balances determine the molar flow rate of the CaSO4 stream leaving the reactor and the molar flow rate of the HF gas stream leaving the reactor. (d) In a second unit, the gaseous hydrofluoric acid is bubbled through water to produce a 1.50 M solution of hydrofluoric acid. What volumetric flow rate of water is required? (Assume that the volume of HF is negligible relative to the volume of water in the solution.)
Expert Solution
steps

Step by step

Solved in 7 steps with 6 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS