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Space Time is the time necessary to process volume of reactor fluid at the entrance conditions. This is the time taken by the amount of fluid to either completely enter or completely exit the reactor. Check FAQs
𝛕=(R+1k')ln(Co+(RCf)(R+1)Cf)
𝛕 - Space Time?R - Recycle Ratio?k' - Rate Constant for First Order Reaction?Co - Initial Reactant Concentration?Cf - Final Reactant Concentration?

Space Time for First Order Reaction using Recycle Ratio Example

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With units
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Here is how the Space Time for First Order Reaction using Recycle Ratio equation looks like with Values.

Here is how the Space Time for First Order Reaction using Recycle Ratio equation looks like with Units.

Here is how the Space Time for First Order Reaction using Recycle Ratio equation looks like.

0.6201Edit=(0.3Edit+12.508Edit)ln(80Edit+(0.3Edit20Edit)(0.3Edit+1)20Edit)
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Space Time for First Order Reaction using Recycle Ratio Solution

Follow our step by step solution on how to calculate Space Time for First Order Reaction using Recycle Ratio?

FIRST Step Consider the formula
𝛕=(R+1k')ln(Co+(RCf)(R+1)Cf)
Next Step Substitute values of Variables
𝛕=(0.3+12.508s⁻¹)ln(80mol/m³+(0.320mol/m³)(0.3+1)20mol/m³)
Next Step Prepare to Evaluate
𝛕=(0.3+12.508)ln(80+(0.320)(0.3+1)20)
Next Step Evaluate
𝛕=0.620066182496664s
LAST Step Rounding Answer
𝛕=0.6201s

Space Time for First Order Reaction using Recycle Ratio Formula Elements

Variables
Functions
Space Time
Space Time is the time necessary to process volume of reactor fluid at the entrance conditions. This is the time taken by the amount of fluid to either completely enter or completely exit the reactor.
Symbol: 𝛕
Measurement: TimeUnit: s
Note: Value should be greater than 0.
Recycle Ratio
Recycle Ratio is defined as volume of feed, returned to the reactor entrance divided by the volume of the leaving streams.
Symbol: R
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.
Rate Constant for First Order Reaction
The Rate Constant for First Order Reaction is defined as the rate of the reaction divided by the concentration of the reactant.
Symbol: k'
Measurement: First Order Reaction Rate ConstantUnit: s⁻¹
Note: Value can be positive or negative.
Initial Reactant Concentration
The Initial Reactant Concentration refers to the amount of reactant present in the solvent before the considered process.
Symbol: Co
Measurement: Molar ConcentrationUnit: mol/m³
Note: Value should be greater than 0.
Final Reactant Concentration
Final Reactant Concentration refers to the amount of reactant present in solution after the considered process.
Symbol: Cf
Measurement: Molar ConcentrationUnit: mol/m³
Note: Value can be positive or negative.
ln
The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function.
Syntax: ln(Number)

Other Formulas to find Space Time

​Go Space Time for Second Order Reaction using Recycle Ratio
𝛕=(R+1)Co(Co-Cf)Cok''Cf(Co+(RCf))

Other formulas in Recycle Reactor category

​Go Initial Reactant Concentration for First Order Reaction in Vessel i
C i-1=Ci(1+(k'trC2'))
​Go Initial Reactant Concentration for First Order Reaction using Reaction Rate
Co=trC2'riXi-1-Xi
​Go Initial Reactant Concentration for Second Order Reaction for Plug Flow or Infinite Reactors
Co=1(1C)-(k''𝛕p)
​Go Reactant Concentration for First Order Reaction in Vessel i
Ci=C i-11+(k'trC2')

How to Evaluate Space Time for First Order Reaction using Recycle Ratio?

Space Time for First Order Reaction using Recycle Ratio evaluator uses Space Time = ((Recycle Ratio+1)/Rate Constant for First Order Reaction)*ln((Initial Reactant Concentration+(Recycle Ratio*Final Reactant Concentration))/((Recycle Ratio+1)*Final Reactant Concentration)) to evaluate the Space Time, The Space Time for First Order Reaction using Recycle Ratio formula is defined as the time taken by the amount of fluid to either completely enter or completely exit the reactor for first order reaction for zero fractional volume change. Space Time is denoted by 𝛕 symbol.

How to evaluate Space Time for First Order Reaction using Recycle Ratio using this online evaluator? To use this online evaluator for Space Time for First Order Reaction using Recycle Ratio, enter Recycle Ratio (R), Rate Constant for First Order Reaction (k'), Initial Reactant Concentration (Co) & Final Reactant Concentration (Cf) and hit the calculate button.

FAQs on Space Time for First Order Reaction using Recycle Ratio

What is the formula to find Space Time for First Order Reaction using Recycle Ratio?
The formula of Space Time for First Order Reaction using Recycle Ratio is expressed as Space Time = ((Recycle Ratio+1)/Rate Constant for First Order Reaction)*ln((Initial Reactant Concentration+(Recycle Ratio*Final Reactant Concentration))/((Recycle Ratio+1)*Final Reactant Concentration)). Here is an example- 0.062007 = ((0.3+1)/2.508)*ln((80+(0.3*20))/((0.3+1)*20)).
How to calculate Space Time for First Order Reaction using Recycle Ratio?
With Recycle Ratio (R), Rate Constant for First Order Reaction (k'), Initial Reactant Concentration (Co) & Final Reactant Concentration (Cf) we can find Space Time for First Order Reaction using Recycle Ratio using the formula - Space Time = ((Recycle Ratio+1)/Rate Constant for First Order Reaction)*ln((Initial Reactant Concentration+(Recycle Ratio*Final Reactant Concentration))/((Recycle Ratio+1)*Final Reactant Concentration)). This formula also uses Natural Logarithm Function function(s).
What are the other ways to Calculate Space Time?
Here are the different ways to Calculate Space Time-
  • Space Time=((Recycle Ratio+1)*Initial Reactant Concentration*(Initial Reactant Concentration-Final Reactant Concentration))/(Initial Reactant Concentration*Rate Constant for Second Order Reaction*Final Reactant Concentration*(Initial Reactant Concentration+(Recycle Ratio*Final Reactant Concentration)))OpenImg
Can the Space Time for First Order Reaction using Recycle Ratio be negative?
No, the Space Time for First Order Reaction using Recycle Ratio, measured in Time cannot be negative.
Which unit is used to measure Space Time for First Order Reaction using Recycle Ratio?
Space Time for First Order Reaction using Recycle Ratio is usually measured using the Second[s] for Time. Millisecond[s], Microsecond[s], Nanosecond[s] are the few other units in which Space Time for First Order Reaction using Recycle Ratio can be measured.
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