1. A commercial polyvinyl alcohol (PVA) pervaporation membrane will be utilised to partially dehydrate an ethanol(1)/water(2) mixture containing 75.8%

Slides:

Advertisements

Similar presentations

Gas Solubilities Henry’s Law: [A]equilibrium = SA · pA

Advertisements

We will call μ the Chemical Potential Right now we will think of it as the molar free energy, but we will refine this definition later… Free Energy.

Diffusion Mass Transfer

Conversion and Reactor Sizing

• Electrodialysis (ED). • Liquid membranes. • Pervaporation.

ERT 313/4 BIOSEPARATION ENGINEERING MASS TRANSFER & ITS APPLICATIONS

Dept of Chemical and Biomolecular Engineering CN2125E Heat and Mass Transfer Dr. Tong Yen Wah, E , (Mass Transfer, Radiation)

Introduction to Mass Transfer

Principles of Mass Transfer (CHAPTER 3) Molecular Diffusion in Liquids.

Equation of Continuity. differential control volume:

03 Nov 2011Prof. R. Shanthini1 Course content of Mass transfer section LTA Diffusion Theory of interface mass transfer Mass transfer coefficients, overall.

SOLUTIONS SUROVIEC SPRING 2014 Chapter 12. I. Types of Solution Most chemical reaction take place between ions/molecules dissolved in water or a solvent.

Separation processes Dr

Solution thermodynamics theory—Part IV

Divide yourselves into groups of three (3). Write your names and your complete solution into your answer sheet, and box / encircle your final answer.

Liquid Phase Properties from VLE Data SVNA 12.1

Reverse Osmosis Lec. 9 Dr. Ola Abdelwahab.

Diffusion Mass Transfer

SIMPLE MIXTURES Chapter 5.

Bioseparation Dr. Kamal E. M. Elkahlout Chapter 3 Mass transfer.

ADVANCED MASS TRANSFER

What happens when we change the quantity of gas

• Pervaporation - Discovered Only operation with phase change.

Example 4: Estimate the requirements of steam and heat transfer surface, and the evaporating temperatures in each effect, for a triple effect evaporator.

Molecular Transport Equations. Outline 1.Molecular Transport Equations 2.Viscosity of Fluids 3.Fluid Flow.

Physical Properties of Solutions Chapter 12 Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Dr Saad Al-ShahraniChE 334: Separation Processes Absorption of Dilute Mixtures  Graphical Equilibrium Stage Method for Trayed Tower  Consider the countercurrent-flow,

13 Oct 2011Prof. R. Shanthini1 Course content of Mass transfer section LTA Diffusion Theory of interface mass transfer Mass transfer coefficients, overall.

Example A MgSO 4 (FW= g/mol) aqueous solution has a weight fraction of 0.2. What is the molality of the solution? Solution A 0.2.

Chapter 11: Other Types of Phase Equilibria in Fluid Mixtures (selected topics)

Terry Rigdon. Ethanol (ethyl alcohol) Made from biomass such as corn or sugar Ethanol added to gasoline Benefits of ethanol over gasoline Brazil has introduced.

Colligative Properties. _______________ – physical properties of solutions that are affected only by the number of particles NOT the identity of the solute.

Last Time Where did all these equations come from?

1 Unit 10: Gases Niedenzu – Providence HS. Slide 2 Properties of Gases Some physical properties of gases include: –They diffuse and mix in all proportions.

Membrane Separation Process. Objectives Estimate the extent of concentration polarization in crossflow filtration Select filtration unit operations to.

Equation of Continuity II. Summary of Equations of Change.

Prof. Mohammad Asif Room 2B45, Building 3

Aquatic Respiration The gas exchange mechanisms in aquatic environments.

Chapter 5 Gases.

Solution thermodynamics theory—Part I

6. Coping with Non-Ideality SVNA 10.3

20 Oct 2011Prof. R. Shanthini1 Course content of Mass transfer section LTA Diffusion Theory of interface mass transfer Mass transfer coefficients, overall.

Concentration Units The concentration of a solution is the amount of solute present in a given quantity of solvent or solution. Percent by Mass x 100%

FLOW THROUGH GRANULAR BEDS AND PACKED COLUMN

Solution thermodynamics theory—Part IV

ACTIVITY AND ACTIVITY COEFFICIENT

Solution Equilibrium and Factors Affecting Solubility

1 Colligative Properties of Solutions. 2 Colligative Properties Colligative properties are physical properties of solutions that change when adding a.

Introduction to phase equilibrium

Solution thermodynamics theory

Ideal and Dilute Solutions 2/21/2016. Master Thermodynamics Equations.

SOLUTION THERMODYNAMICS:

Colligative Properties. ____________ – physical properties of solutions that are affected only by the number of particles NOT the identity of the solute.

Classical Thermodynamics of Solutions

Students: Amiran Divekar ( ) Ameedhara Hingrajiya ( ) Priyal Parikh ( ) Sal College of engineering Department of Chemical.

Chapter 10: Gases STP *standard temp and pressure temp= K, 0ºC pressure= 101.3kPa, 1atm, 760mmHg, 760torr Problems Convert: a) 0.357atm  torr b)

Concept of HETP, HTU and NTU

 Also known as scrubbing  A unit operation that involves the diffusion of the solute from the gas phase through a stagnant liquid  There is a mass.

Mass transfer Introduction P.M. Dr Mahmad Nor Jaafar Room # 3 Bioprocess Tel: Or Agrotechnology Unit Tel

Sorption Properties of Food

Blend membrane by using the PVA/chitosan and crosslinking with TEOS for pervaporation separation for water acetic acid mixtures Shivshankar Chaudhari1,

Solution of Thermodynamics: Theory and applications

A First Course on Kinetics and Reaction Engineering

Understanding Water Potential

Convective Mass Transfer Coefficient

Understanding Water Potential

Understanding Water Potential

Chapter 9.4 – Colligative Properties

Chemical Engineering Department

Understanding Water Potential

Presentation transcript:

1. A commercial polyvinyl alcohol (PVA) pervaporation membrane will be utilised to partially dehydrate an ethanol(1)/water(2) mixture containing 75.8% ethanol at a feed temperature of 60ºC. Since PVA membranes are hydrophilic, water will selectively permeate across the membrane. The resulting permeate was found to contain 9.0 wt% ethanol. Given that the permeate flux is 0.40 kg/m 2 ·h, calculate values of permeability coefficient for water and ethanol if the outlet pressure is 76 mmHg. Recall that the driving force in pervaporation is a difference of chemical potential (or fugacity, or activity), and that the molar flux is equal to the permeability times the driving force. Assume ideal gas and non-ideal liquid behaviour when calculating fugacities. Problem set #3 (deadline ) Membrane Separations

2. A liquid containing dilute solute A at a concentration c 1 =0.030 kmol/m 3 is flowing rapidly by a membrane of thickness L=3.0·10 -5 m. The distribution coefficient K’=1.5 and D AB =7.0· m 2 /s in the membrane. The solute diffuses through the membrane and its concentration on the other side is c 2 = kmol/m 3. The mass transfer coefficient k c1 is large and can be considered as infinite and k c2 =2.02·10 -5 m/s. a) Derive the equation to calculate the steady-state flux N A and make a sketch. b) Calculate the flux and the concentrations at the membrane interfaces. Problem set #3 Membrane Separations

3. Experiments at 25 ºC were performed to determine the permeabilities of a cellulose acetate membrane. The laboratory test section has a membrane area A=2·10 -3 m 2. The inlet feed solution concentration of NaCl is c 1 =10 g NaCl/L solution (  1 =1004 kg sol./m 3 ). The water recovery is assumed low so that the concentration c 1 in the entering feed solution flowing past the membrane and the concentration of the reject solution are equal. The product solution contains c 2 =0.39 g NaCl/L sol. (  2 =997 kg sol./m 3 ) and its flow rate is 1.92·10 -8 m 3 sol./s. A pressure differential of 5514 kPa (54.42 atm) is used. Calculate the permeability constants and the solute rejection R. Problem set #3 Membrane Separations