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rate of a reaction can be increased by increasing the temperature if the reactor
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What is the effect of temperature on conversion value in cstr?
Temperature affects the conversion value in a CSTR in two ways: 1) it should increase the rate of conversion 2) it should shift the equilibrium of the reaction note that in shifting the equilibrium, it shifts the equilibrium of ALL reactions including side reactions which can be suppressed or promoted If the reaction is nearing equilibrium prior to exiting the reactor, the second effect can be very significant. Increasing the rate of conversion could allow faster throughput in the reactor with the same conversion - unless the effect on equilibrium shift is significant
Diffeerence between CSTR and PFR on volume baises?
For simple understanding PFR can be imagined as multiple CSTR's in series. PFR has benefits of higher conversion rates, product uniformity & less energy losses. CSTR stands for Continuously Stirred Tank Reactor. PFR stands for Plug Flow Reactor.
What are the conditions for reaction between Ethylene oxide and water in a plug flow reactor or in a Continuous Stirred Tank Reactor?
The Feed conditons entering are at 25 deg c with 101.3 kpa the reactor is a cstr operating at 65deg c the product if ethylene glycol!!!!!!
How is enhance used in a sentence?
The National Broadband Network will enhance our internet
What is enhance mode?
Viagra
What is the effect of temperature on conversion value in cstr?
Temperature affects the conversion value in a CSTR in two ways: 1) it should increase the rate of conversion 2) it should shift the equilibrium of the reaction note that in shifting the equilibrium, it shifts the equilibrium of ALL reactions including side reactions which can be suppressed or promoted If the reaction is nearing equilibrium prior to exiting the reactor, the second effect can be very significant. Increasing the rate of conversion could allow faster throughput in the reactor with the same conversion - unless the effect on equilibrium shift is significant
What measures of how fast reaction occurs?
The measure is the rate of reaction.
What is the ticker symbol for coinstars?
Cstr
What is the speed at which a reaction occurs called?
The chemical term is reaction rate.
What describes a reaction that reaches equilibrium?
The product and reactants reach a final, unchanging level.
What is the function of mgcl2 in pcr?
it enhance the reaction
What effect does the concentration of reactants have on the the rate of a reaction?
The effect of concentration of reactants on rate of reaction depends on the ORDER of the reaction. For many reactions, as the concentration of reactants increases, the rate of reaction increases. There are exceptions however, for example a zero order reaction where the rate of reaction does not change with a change in the concentration of a reactant.
Could heat increase the rate of reaction?
if reaction is exothermic then on heating rate of reaction wil be low,and if reaction is endothermic then rate of reaction wil be high on heating
What is the equation for reaction rate?
. The transformation of glucose into fructose by the enzyme glucose isomerase, was carried out in two different types suspended-enzyme bioreactors: 1) CSTR, and 2) plug flow reactor. The process obeys Michaelis-Menten kinetics. The following parameters and kinetic constants were kept the same in both bioreactors: $ So (input substrate concentration) = 1.0 mMol/L; $ F (volumetric flow rate) = 1.0 m3/h; $ Km = 7x10-4 Mol/L; $ Vmax = 0.2 mMol/(L.h) Determine: $ Volume of CSTR for 50% conversion of glucose; $ Volume of PFR for 50% conversion of glucose; $ Volumes of CSTR and PFR in series (assume that the volumes are equal) in two cases: $ first CSTR $ first PFR 2. Calculate the volume of a stirred tank bioreactor containing the same enzyme, but immobilized on the surface of a flat-geometry support. The value of the mass-transfer coefficient is 0.6 h-1. The values of the rest of process parameters are the same as above.
Why volume PFR less than CSTR for same conversion and reaction rate?
The reason that a PFR requires less volume than a CSTR is the difference in residence time distribution between the reactors. Residence time is the amount of time molecules spend in the reactor which equal to v/vo (v=volume of the reactor and v0 is volumetric flow rate). Let us assume that we design a PFR and CSTR that have similar residence time i.e. ratio of volume v and v0 is the same and we are pumping about 100 molecule per minute to each reactor. In the case of PFR, all the 100 molecules will spend exactly the same time inside the reactor (v/v0). In the case of CSTR, things are little more complicated, once the 100 molecule hit the CSTR, they mixted instantaneously and thus some of these 100 molecules will leave from the reactor exit stream very early i.e. will spend much less time inside the reactor (less the v/v0) and of course some these 100 molecule will spend more time making the average residence time the same as the PFR. Therefore, with the chance that molecules will spend shorter time in CSTR, we try to compensate for that effect by making bigger reactors so the ratio of these molecules spending short period of time inside the reactor less and thus its performance is comparable to the PFR. Very logical and easy to understand explanation. But how to prove series of CSTR equals to one PFR which is having a volume of sum of all CSTRs?
What is the rate of the of a reaction?
An expression relating the rate of a reaction to the rate constant and the concentrations of the reactants
During dynamic equilibrium how do forward reaction rate and reverse reaction rate compare?
Equilibrium at this point means that the forward reaction and the backward reaction are taking place at the same rate. The formation of the products and the reactants are at equal rate.
