Process Variables Flashcards
How do you Calculate Conversion?
Conversion is the Ratio of How mich Reactant A has Reacted
What is the Haber Process
100 kmol/h Nitrogen Gas Enters the Reactor, the reactor has a conversion of 15%, how much nitrogen has leaves the reactor
What is a Recycle Stream
a stream that returns unreacted reactants back to the reactor inlet.
The Haber Process has a Change in Enthalpy of -91 kj/mol.
Identify two ways to increase the conversion of the Reactor.
Negative Enthalpy Change means Exothermic Reaction, by lowering the temperature this shifts the equilibrium to the right. More ammonia is produced.
The Reactants has 4 moles and the Products has 2 moles, this means that the Entropy is negative, if we raise the pressure, this shifts the equilibrium to the right. More ammonia is produced.
Explain across the perspectives of a Process Engineer, Business Manager and Saftey Engineer why High Pressure and Low Temperature are Undesireable.
What are Process variables
Properties that can vary while the process is ongoing.
Mixture Density
Specific Gravity
Flow Rates
Absolute and Gauge Pressure
Chemical Composition
Average Molecular Weight
Pressure
Temperature
What is Avogardros Number
The number of particles within a mol of a substance
6.02X10^23
A Mixture of Gasses has the Following Components by Mass Fraction
What are the Mole Fractions for each of these components
A Mixture of Gasses has the Following Components by mole Fraction
What are the Mass Fractions for each of these components
A Mixture of Gasses has the Following Components by mole Fraction
What is the Average Molecular Mass
A Mixture of Gasses has the Following Components by Mass Fraction
What is the Average Molecular Mass
Mass Flow Rate , Mole Flow Rate and Volumetric Flow Rate can all be Equated to each other if multiplied with the correct constant.
What are those Constants?
What is Absolute Pressure
What is Guage Pressure
What are Barometric Pressures
The pressure of a system relative to an Absolute Vaccum
The Pressure of a system relative to atmospheric pressure
pGuage = pAbsolute - pBarometric
Barometric Pressure is Atmospheric Pressure
How is Guage Pressure or Absolute Pressure Denoted in the units?
But adding an a(absolute) or g(guage) at the end of the unit.
PSIg
PSIa
Barg
Bara
1
2
3
4
