Roberto PANTANI | PRINCIPLES OF CHEMICAL ENGINEERING

cod. 0612200011

PRINCIPLES OF CHEMICAL ENGINEERING

	0612200011
	DIPARTIMENTO DI INGEGNERIA INDUSTRIALE
	EQF6
	CHEMICAL ENGINEERING
	2018/2019

CURRICULUM INGEGNERIA ALIMENTARE

	OBBLIGATORIO
	YEAR OF COURSE 2
	YEAR OF DIDACTIC SYSTEM 2016
	SECONDO SEMESTRE

TEACHING UNITS

	SSD	CFU	HOURS	ACTIVITY	TYPE OF ACTIVITY
	ING-IND/24	12	120	LESSONS	COMPULSORY SUBJECTS, CHARACTERISTIC OF THE CLASS

PROFESSORS

	ROBERTO PANTANI T Curriculum
	FRANCESCO MARRA Curriculum

	Objectives
	Knowledge and understanding: Notions about the rate of transfer for heat, mass and momentum; laws of Newton, Fourier and Fick; transport properties (viscosity, thermal conductivity, mass diffusivity) and derived variables; balances of momentum, energy and mass on systems both closed and open, furthermore, on finite and differential volumes (along one single direction); correlations for the exchange coefficients. Uses of diagrams for the solution of one-dimensional transient heat or mass transfer problems (slab, infinite cylinder and sphere). Applying knowledge and understanding – engineering analysis Ability to solve simple engineering problems, involving transport phenomena for momentum, heat and mass. At the end of the course the student will be able to: formulate and apply the macroscopic balance for momentum, heat and mass to open and closed systems; calculate energy losses, drag forces, transfer coefficients, evolution for heat and mass one-dimensional transient process; to write the balance equations for real problems selecting the adequate boundary conditions; to solve the balance equations for simple problems (one independent variable). Applying knowledge and understanding – engineering design To face out simple sizing problems related to part of apparatuses or elementary apparatuses. Ability to use the basic transport phenomena of momentum, heat and mass to design and to carry out experiments, to analyze the data and to obtain conclusions. Making judgments - engineering practice: The use of diagrams for the solution of one-dimensional transient heat or mass transfer problems and of the relationships to calculate the transport coefficients. The use of tables for material properties as function of temperature and pressure. Communication skills – transversal skills: Acquisition of the specific language of chemical engineering. Learning skills – transversal skills: The student will be able to use the acquired skills in scenarios different from those presented during the lessons, and to go deep about topics different from those explained.

Knowledge and understanding:
Notions about the rate of transfer for heat, mass and momentum; laws of Newton, Fourier and Fick; transport properties (viscosity, thermal conductivity, mass diffusivity) and derived variables; balances of momentum, energy and mass on systems both closed and open, furthermore, on finite and differential volumes (along one single direction); correlations for the exchange coefficients. Uses of diagrams for the solution of one-dimensional transient heat or mass transfer problems (slab, infinite cylinder and sphere).

Applying knowledge and understanding – engineering analysis
Ability to solve simple engineering problems, involving transport phenomena for momentum, heat and mass. At the end of the course the student will be able to: formulate and apply the macroscopic balance for momentum, heat and mass to open and closed systems; calculate energy losses, drag forces, transfer coefficients, evolution for heat and mass one-dimensional transient process; to write the balance equations for real problems selecting the adequate boundary conditions; to solve the balance equations for simple problems (one independent variable).

Applying knowledge and understanding – engineering design
To face out simple sizing problems related to part of apparatuses or elementary apparatuses. Ability to use the basic transport phenomena of momentum, heat and mass to design and to carry out experiments, to analyze the data and to obtain conclusions.

Making judgments - engineering practice:
The use of diagrams for the solution of one-dimensional transient heat or mass transfer problems and of the relationships to calculate the transport coefficients. The use of tables for material properties as function of temperature and pressure.

Communication skills – transversal skills:
Acquisition of the specific language of chemical engineering.

Learning skills – transversal skills:
The student will be able to use the acquired skills in scenarios different from those presented during the lessons, and to go deep about topics different from those explained.

	Prerequisites
	PROPAEDEUTIC COURSE: CHEMICAL ENGINEERING THERMODYNAMICS

	Contents
	MOMENTUM TRANSFER (30h the, 30h exe) Hydrostatic basic topics (3h the, 3h exe). Stress tensor, Newton’s law, viscosity and dependence upon temperature and pressure (4h the, 3h exe). Differential balance of momentum (for the cases in which one single component of the velocity is relevant, and it is function of a single coordinate); Stokes’ law (9h the, 10h exe). Laminar and turbulent motion, Reynolds’ number, dimensional analysts, Buckingam’s theorem, drag factor and correlations with Reynolds’ number, drag forces and settling velocity calculation for submerged bodies (6h the, 6h exe). Macroscopic balances of mass and momentum; mechanical energy balance; energy losses distributed and localized (8h the, 8h exe). HEAT TRANSFER (20h the, 20h exe) Heat flux, Fourier’s law, conductivity and dependence upon temperature and pressure (3h the, 3h exe). Prandtl’s number; heat exchange coefficients and heat flux through single and composite walls for several geometries (2h the, 2h exe). Conductive heat transfer and heat generation; forced and natural convection (3h the, 3h exe). Correlations between dimensionless numbers, calculation and uses of exchange coefficients (4h the, 4h exe). Transient heat conduction: differential balance, dimensional analysis and Biot’s number (3h the, 3h exe). Macroscopic balances of energy, heat transfer equipment (co-current and counter-current) (3h the, 3h exe). Radiative heat transfer: absorption and emission coefficients, gray bodies, laws of Stefan-Boltzman and of Lambert, view factors (2h the, 2h exe). MASS TRANSFER (10h the, 10h exe) Mass flow, Fick’s law, diffusivity and dependence upon concentration, temperature and pressure (2h the, 2h exe). Schmidt number. Counter-diffusion and diffusion through a stagnant fluid (1h the, 1h exe). Diffusion through an homogeneous medium with chemical reaction at wall (1h the, 1h exe). Dimensional analysis, mass and heat transfer analogies, Colburn’s analogy, calculation and uses of the mass transfer coefficients. Interface equilibrium between phases, resistance combination (2h the, 2h exe). Diffusion within a solid in transient regime, Biot’s number for mass transfer (2h the, 2h exe). Macroscopic mass balance, absorption towers, simultaneous heat and mass transfer (2h the, 2h exe).

Contents

MOMENTUM TRANSFER (30h the, 30h exe)
Hydrostatic basic topics (3h the, 3h exe).
Stress tensor, Newton’s law, viscosity and dependence upon temperature and pressure (4h the, 3h exe).
Differential balance of momentum (for the cases in which one single component of the velocity is relevant, and it is function of a single coordinate); Stokes’ law (9h the, 10h exe).
Laminar and turbulent motion, Reynolds’ number, dimensional analysts, Buckingam’s theorem, drag factor and correlations with Reynolds’ number, drag forces and settling velocity calculation for submerged bodies (6h the, 6h exe).
Macroscopic balances of mass and momentum; mechanical energy balance; energy losses distributed and localized (8h the, 8h exe).

HEAT TRANSFER (20h the, 20h exe)
Heat flux, Fourier’s law, conductivity and dependence upon temperature and pressure (3h the, 3h exe).
Prandtl’s number; heat exchange coefficients and heat flux through single and composite walls for several geometries (2h the, 2h exe).
Conductive heat transfer and heat generation; forced and natural convection (3h the, 3h exe).
Correlations between dimensionless numbers, calculation and uses of exchange coefficients (4h the, 4h exe).
Transient heat conduction: differential balance, dimensional analysis and Biot’s number (3h the, 3h exe).
Macroscopic balances of energy, heat transfer equipment (co-current and counter-current) (3h the, 3h exe).
Radiative heat transfer: absorption and emission coefficients, gray bodies, laws of Stefan-Boltzman and of Lambert, view factors (2h the, 2h exe).

MASS TRANSFER (10h the, 10h exe)
Mass flow, Fick’s law, diffusivity and dependence upon concentration, temperature and pressure (2h the, 2h exe).
Schmidt number. Counter-diffusion and diffusion through a stagnant fluid (1h the, 1h exe).
Diffusion through an homogeneous medium with chemical reaction at wall (1h the, 1h exe).
Dimensional analysis, mass and heat transfer analogies, Colburn’s analogy, calculation and uses of the mass transfer coefficients. Interface equilibrium between phases, resistance combination (2h the, 2h exe).
Diffusion within a solid in transient regime, Biot’s number for mass transfer (2h the, 2h exe).
Macroscopic mass balance, absorption towers, simultaneous heat and mass transfer (2h the, 2h exe).

	Teaching Methods
	THE COURSE CONSISTS IN FRONT LESSONS (60 H) AND CLASSROOM EXERCISES (60 H) FOR A TOTAL AMOUNT OF 120 HOURS WHICH ARE WORTH 12 CREDITS (CFU). LECTURES ARE PROVIDED IN CLASSES IN THE PRESENCE OF STUDENTS. THE MINIMUM FRACTION OF ATTENDED HOURS OF LECTURES REQUIRED TO TAKE THE EXAM IS 70% THE ATTENDANCE CHECK WILL NOT BE CARRIED OUT. STUDENTS WHO DO NOT REACH THE SUFFICIENT NUMBER OF ATTENDED HOURS MUST SUBMIT A REQUEST TO THE TEACHING COUNCIL, SPECIFYING THE TOPICS THEY COULD NOT ATTEND AND THE REASONS. THE COUNCIL WILL ESTABLISH THE METHODS OF MAKING UP MISSED LESSONS ON A CASE-BY-CASE BASIS

Teaching Methods

THE COURSE CONSISTS IN FRONT LESSONS (60 H) AND CLASSROOM EXERCISES (60 H) FOR A TOTAL AMOUNT OF 120 HOURS WHICH ARE WORTH 12 CREDITS (CFU).

LECTURES ARE PROVIDED IN CLASSES IN THE PRESENCE OF STUDENTS.
THE MINIMUM FRACTION OF ATTENDED HOURS OF LECTURES REQUIRED TO TAKE THE EXAM IS 70%
THE ATTENDANCE CHECK WILL NOT BE CARRIED OUT.
STUDENTS WHO DO NOT REACH THE SUFFICIENT NUMBER OF ATTENDED HOURS MUST SUBMIT A REQUEST TO THE TEACHING COUNCIL, SPECIFYING THE TOPICS THEY COULD NOT ATTEND AND THE REASONS. THE COUNCIL WILL ESTABLISH THE METHODS OF MAKING UP MISSED LESSONS ON A CASE-BY-CASE BASIS

	Verification of learning
	The learning assessment process requires a written test and an oral test. The written test has a duration of two hours, it is an open-book test, the candidate can make use of whatever he/she wants (no internet), and the test is made by two exercises, each one with three questions. For each question there is a grade (5 points on average), and these points are given entirely if the answer is correct even from numerical point of view, at 80% if there is a calculation mistake, from 10% to 70% if the answer is given but conceptual errors are present (zero if the answer is absent or seriously flawed). The oral test is made by a single question on a topic analyzed during the course; the average duration starts from twenty minutes (if the answers are given rapidly and correctly), up to one hour if the candidate is not sure in his/her answers and takes time to give the answers. The sufficiency is obtained if the candidate demonstrates the ability to select the methods to be used, to write correctly the model equations and at least to select the correct path to their solution. The excellence is obtained when the candidate is able to face out successfully even aspects of the topic not analyzed during the course. The final grade depends from the level of exposition and from the confidence shown with the course’s topics, and with the methods, the uses of which have been shown during the course.

Verification of learning

The learning assessment process requires a written test and an oral test. The written test has a duration of two hours, it is an open-book test, the candidate can make use of whatever he/she wants (no internet), and the test is made by two exercises, each one with three questions. For each question there is a grade (5 points on average), and these points are given entirely if the answer is correct even from numerical point of view, at 80% if there is a calculation mistake, from 10% to 70% if the answer is given but conceptual errors are present (zero if the answer is absent or seriously flawed). The oral test is made by a single question on a topic analyzed during the course; the average duration starts from twenty minutes (if the answers are given rapidly and correctly), up to one hour if the candidate is not sure in his/her answers and takes time to give the answers. The sufficiency is obtained if the candidate demonstrates the ability to select the methods to be used, to write correctly the model equations and at least to select the correct path to their solution. The excellence is obtained when the candidate is able to face out successfully even aspects of the topic not analyzed during the course. The final grade depends from the level of exposition and from the confidence shown with the course’s topics, and with the methods, the uses of which have been shown during the course.

	Texts
	Bird R.B., Stewart W.E., Lightfoot E.N., Transport Phenomena, II Edition, Wiley New York (2002)

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Roberto PANTANI | PRINCIPLES OF CHEMICAL ENGINEERING