Material & Energy Balances
Mass and energy conservation applied to chemical processes, followed through one dry-grind ethanol plant: flowcharts and process variables, degree-of-freedom analysis, multiple units, recycle and purge, reactions and combustion, gases and phase equilibrium, and energy balances with heating, phase change and reaction.
CHE-200 Year 2 3 credits 12 lessons · 4 h 56 min ▶ Video lessons coming soon
Offered by HSM University · Chemical Engineering
This is the Canadian version of this course. See the American version.
What you'll learn
- Read block flow diagrams and process flow diagrams, classify processes as batch, continuous or semibatch, and write the general balance equation for any system.
- Convert units in SI and US customary systems, check dimensional homogeneity, and describe streams by mass, volumetric and molar flow, composition, pressure and temperature.
- Draw and label flowcharts, carry out degree-of-freedom analyses, and solve material balances on single units, including as linear systems.
- Solve material balances on multiple-unit processes with mixers, splitters and separators, choosing boundaries and solution order from degree-of-freedom tables.
- Analyse processes with recycle, bypass and purge, distinguish single-pass and overall conversion, and solve recycle loops by tearing and iteration.
- Apply stoichiometry, limiting and excess reactants, conversion, extent of reaction, yield, selectivity and equilibrium to balances on reacting systems.
- Calculate theoretical and excess air, flue gas compositions on wet and dry bases, and excess air from a measured flue gas analysis.
- Use liquid densities, the ideal gas law, standard conditions, partial pressures, compressibility factors, the virial equation and cubic equations of state.
- Apply the phase rule, vapour pressure correlations, humidity and saturation measures, and Raoult's and Henry's laws, including bubble and dew point calculations.
- Write energy balances for closed and open systems, use steam tables and reference states, and apply the mechanical energy balance to pumps and piping.
- Calculate enthalpy changes for heating, cooling, phase change and mixing along hypothetical paths, and solve energy balances on heat exchangers.
- Calculate heats of reaction from heats of formation, use heating values, solve reactor energy balances, and find adiabatic flame temperatures.
Course content
12 lessons · 4 h 56 min total · final exam
- 1 Chemical engineering and process flow diagrams 24 min · quiz
- 2 Units, dimensions and process variables 24 min · quiz
- 3 Material balance fundamentals and degrees of freedom 24 min · quiz
- 4 Balances on multiple-unit processes 24 min · quiz
- 5 Recycle, bypass and purge 26 min · quiz
- 6 Reacting systems: stoichiometry, conversion and yield 24 min · quiz
- 7 Combustion balances 24 min · quiz
- 8 Single-phase systems: liquids, ideal gases and real gases 23 min · quiz
- 9 Multiphase systems: phase equilibrium, Raoult's law and humidity 27 min · quiz
- 10 Energy and the first law for process systems 27 min · quiz
- 11 Energy balances on nonreactive processes 24 min · quiz
- 12 Energy balances on reactive processes 25 min · quiz
- E Final exam 20 questions
Requirements
Recommended background. You can start any course at any time.
Description
Mass and energy conservation applied to chemical processes, followed through one dry-grind ethanol plant: flowcharts and process variables, degree-of-freedom analysis, multiple units, recycle and purge, reactions and combustion, gases and phase equilibrium, and energy balances with heating, phase change and reaction.
Part of the Engineering stream, typically taken in year 2.