CBE582 Separation Processes I UITM Assignment Sample Malaysia
CBE582 Separation Processes I is a course typically offered in chemical and biochemical engineering programs. The course covers fundamental concepts and principles related to separation processes, which are used to separate mixtures of substances into their individual components.
Students may also learn about various separation equipment and their design, as well as how to analyze and optimize separation processes. Overall, the goal of CBE582 Separation Processes I is to equip students with the necessary knowledge and skills to design and analyze separation processes in a variety of applications, including the chemical, petrochemical, pharmaceutical, and food industries.
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Below, we will describe some assignment briefs. These are:
Assignment brief 1: Distinguish the mechanism of mass transfer and fluid interaction principles on the gas-liquid, liquid-liquid and vapor-liquid system.
Mass transfer refers to the movement of mass or material from one place to another. In the context of gas-liquid, liquid-liquid, and vapor-liquid systems, mass transfer can occur through diffusion, convection, and/or interphase mass transfer.
Diffusion occurs when molecules move from areas of high concentration to areas of low concentration. This process occurs at the molecular level and is driven by concentration gradients. In gas-liquid, liquid-liquid, and vapor-liquid systems, diffusion can occur between the gas, liquid, and vapor phases.
Convection, on the other hand, involves the movement of mass due to the bulk flow of fluids. This process occurs due to differences in fluid velocities or pressure gradients. In gas-liquid, liquid-liquid, and vapor-liquid systems, convection can occur through the movement of the gas or liquid phase.
Interphase mass transfer refers to the transfer of mass between the gas, liquid, and vapor phases across the interfacial boundary. This process is driven by differences in concentration or pressure between the phases and can occur through diffusion, convection, or a combination of both.
Fluid interaction principles play a crucial role in mass transfer in gas-liquid, liquid-liquid, and vapor-liquid systems. These principles include hydrodynamics, interfacial phenomena, and thermodynamics.
Hydrodynamics refers to the study of fluid motion and its effect on mass transfer. In gas-liquid, liquid-liquid, and vapor-liquid systems, hydrodynamics can impact the rate and direction of mass transfer through changes in fluid velocity, pressure, and turbulence.
Interfacial phenomena refer to the behavior of the interfacial boundary between the gas, liquid, and vapor phases. This includes phenomena such as wetting, adsorption, and surface tension, which can impact the interphase mass transfer process.
Thermodynamics refers to the study of energy and its relation to the properties of matter. In gas-liquid, liquid-liquid, and vapor-liquid systems, thermodynamic principles can impact mass transfer through changes in temperature, pressure, and chemical potential gradients.
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Assignment Brief 2: Perform chemical engineering calculations involving mass and heat transfer in distillation, absorption and extraction column.
Certainly! Mass and heat transfer calculations are crucial in chemical engineering, particularly in distillation, absorption, and extraction columns. Here are some basic calculations that are commonly used:
Distillation column calculations:
- Number of theoretical plates: N = ln(R)/ln(α), where R is the reflux ratio and α is the relative volatility of the components.
- Height of theoretical plates: H = HETP x N, where HETP is the height equivalent to a theoretical plate.
- Minimum reflux ratio: Rmin = (L/D)(α-1)/(α^(N-1)-1), where L is the liquid flow rate, D is the vapor flow rate, and N is the number of theoretical plates.
Absorption column calculations:
- Height of packing: H = (NTU/HT) x (m/(ρA x a)), where NTU is the number of transfer units, HT is the height equivalent to a theoretical stage, m is the mass flow rate of the gas, ρA is the density of the liquid, and a is the interfacial area per unit volume of packing.
- Overall mass transfer coefficient: Kya = a x kLa, where Kya is the overall mass transfer coefficient, a is the interfacial area per unit volume of packing, and kLa is the mass transfer coefficient of the gas phase.
- Number of transfer units: NTU = (H/HT) x (ρA x a/m) x (Kya/kLa), where H is the height of the packing.
Extraction column calculations:
- Extraction efficiency: E = (Cf – Cw)/(Cf – Ce), where Cf is the concentration of the solute in the feed, Cw is the concentration of the solute in the aqueous phase, and Ce is the concentration of the solute in the extract.
- Number of theoretical stages: N = ln((1-E)/E)/ln(R), where R is the solvent-to-feed ratio.
- Extraction factor: F = Vw/(Vf + Vw), where Vw is the volume of the aqueous phase and Vf is the volume of the feed.
These are just a few examples of the types of calculations that can be performed in mass and heat transfer in distillation, absorption, and extraction columns. Other important calculations include heat and mass balances, energy balances, and pressure drop calculations.
Assignment Brief 3: Evaluate the performance of the distillation, absorption and extraction column according to the conceptual design.
Distillation is one of the most important processes in the chemical industry, as it is used to purify a wide range of chemicals. The performance of a distillation column depends on a number of factors, including the type of column, the feedstock, the operating conditions, and the column internals.
The most important factor in determining the performance of a distillation column is the type of column. The three most common types of columns are tray columns, packed columns, and membrane columns. Each type of column has its own advantages and disadvantages, and the choice of the column depends on the application.
Tray columns are the most common type of distillation column, and are used for a wide range of applications. They are simple to operate and maintain and are relatively inexpensive. However, tray columns are less efficient than packed or membrane columns, and can be more difficult to scale up.
Packed columns are more efficient than tray columns, and are often used for applications where a high degree of separation is required. They are also less susceptible to fouling than tray columns and can be used at higher temperatures and pressures. However, packed columns are more expensive than tray columns, and can be more difficult to operate and maintain.
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