Table of Contents
What is material balance in chemical engineering?
Types of Material Balance Problems. B. Historical Perspective. I. CONSERVATION OF MASS.
Why is material balance important in chemical engineering?
Material balances are important first step when designing a new process or analyzing an existing one. Thus, material balances are often compared to the balancing of current accounts. They are used in industry to calculate mass flow rates of different streams entering or leaving chemical or physical processes.
How do you calculate material balance?
Material Balance is nothing but just checking whether the input quantities and output quantities of a Chemical reaction is upto the calculation, simply equal or not….[How To]Perform a Material Balance calculation.
| Mol Wt | Weight | |
|---|---|---|
| A | 49.5 | 100 |
| B | 25 | 16.1 |
| X | 70.5 | 60 |
| Y | 60 | 60 |
What are the types of material balance?
9.4. Two types of material balance errors are considered: local and global. Local material balance error is the error in the material balance calculation for each gridblock over a time step. The sum of all local material balance errors gives the global material balance error.
What is the first step in material balancing?
To solve a material-balance problem, it is advisable to proceed by a series of definite steps, as listed below:
- Sketch a simple diagram of the process.
- Write the chemical equations involved (if any).
- Select a basis for calculation.
- Make a material balance.
What do you mean by material balance?
A mass balance, also called a material balance, is an application of conservation of mass to the analysis of physical systems. By accounting for material entering and leaving a system, mass flows can be identified which might have been unknown, or difficult to measure without this technique.
What is material balance principle?
51.5 Conclusions. Material balance is based on the mass conservation principle which states that the sum of the weight of all inputs must be exactly equal to the sum of all outputs. Such simple postulate provides significant information when used for evaluating systems.
Why is material balance important?
Material and energy balances are very important in an industry. Material balances are fun- damental to the control of processing, particularly in the control of yields of the products.
What is material balance process?
What is meant by material balance?
What is accumulation in material balance?
Accumulation is usually the rate of change of holdup within the system — the change of material within the system. It may be positive (material is increasing), negative (material decreasing), or zero (steady state).
What is a material balance?
A material balance is an accounting for material. Thus, material balances are often compared to the balancing of current accounts. They are used in industry to calculate mass flow rates of different streams entering or leaving chemical or physical processes.
How do you find the number of independent material balance equations?
Number of Independent Material Balance Equations in Process without Chemical Reaction For processes with no chemical reaction, N m= N i where N m= number of independent material balance equations. N i= total number of chemical species (or components) involved in the process. LECTURE 9.
When should I write additional material balances for chemical reactions?
Systems that include chemical reaction always require formation and/or consumption terms. If a single species balance does not provide sufficient information to solve the problem, write additional material balances up to the total number of species.
What is the material balance equation for a steady state process?
Since the process is at steady-state condition and no chemical reaction is involved, the material balance equation becomes Input = Output This balance equation can be applied to: 1. The total mass entering and leaving the process 2. Mass of individual component entering and leaving the process.