What is a slurry bubble column reactor?
A bubble column reactor is an apparatus used to generate and control gas-liquid chemical reactions. It consists of a vertically-arranged cylindrical column filled with liquid, at the bottom of which gas is inserted.
How does bubble column reactor work?
The bubble column reactors represent contactors in which a gas or a mixture of gases is distributed in the liquid at the column bottom by an appropriate distributor and moves upwards in the form of bubbles causing intense mixing of the liquid phase.
What is slurry reactor?
A slurry reactor is a reactor in which contact is achieved by suspending a solid in a liquid. The solid-catalyzed reaction of a gas with a liquid can be carried out in a slurry reactor, where fine catalyst particles are suspended in the liquid. In the slurry reactor, the catalyst is suspended in the liquid.
What is the aspect ratio of bubble column bioreactor?
Industrial bubble columns usually operate with a length-to-diameter ratio, or aspect ratio of at least 5 [1]. In biochemical applications this value usually varies between 2 and 5. The effects brought about by the selection of column dimensions have found interest in bubble column reactor design.
How does a fluidized bed reactor work?
Fluidized-bed reactors (FBR) are the most popular reactor configurations employed for reactions involving solid reactants. In the FBR, a fluidization medium (gas or liquid) is passed through the bed of solid reactants at high enough velocities to suspend the solid and cause it to behave like a fluid.
Which size of bubbles is relevant for mass transfer?
2. Which size of bubbles is relevant for mass transfer? Explanation: The most important property of air bubbles in fermenters is their size. Small bubbles have correspondingly slow bubble-rise velocities; consequently they stay in the liquid longer, allowing more time for the oxygen to dissolve.
How do you make a bubble column elevator?
Starts here4:18Easy Bubble Column Water Elevator – Minecraft Tipsricks #6 – YouTubeYouTube
What is slurry polymerization?
Aqueous slurry polymerization is the most widely adopted techniques/process for acrylic fiber manufacturing. Water is used here as a continuous phase of the system. The polymerization reaction progress through initiation, propagation and termination steps of radicals and precipitated polymer particles forms a slurry.
How does an airlift reactor work?
An airlift bioreactor works by agitating the contents of the bioreactor pneumatically using gas. The gas used for agitation can act to either, introduce new molecules to the mixture inside of the bioreactor, or remove specific metabolic molecules produced by microorganisms.
What type of reactor is fluidized bed?
multiphase catalytic reactors
Fluidized bed reactors are another class of multiphase catalytic reactors which have unique advantages in terms of heat and mass rates and mixing. In two- or three-phase fluidization systems, gas and liquid phases are used as carrier fluids, with internal or external separation of the solid catalyst for recycling.
What is the difference between bubble columns and slurry reactors?
Although bubble columns are superior to ASRs in terms of performance, they have more problems associated with scale-up ( Stitt, 2002 ). Slurry reactors could be of continuous type if the slurry (liquid and solids) flows through the reactor or of batch type if the slurry is stationary in the reactor.
What is the role of gas bubbles in a gas-reactor?
At high gas rates, the presence of gas bubbles can help mix the liquid and reduce the need for external agitation. This is exploited in loop reactors and draft-tube reactors. In a loop reactor, the gas is fed at the bottom of one side of a U-shaped reactor loop (the riser) and bubbles up through the liquid.
How does a membrane slurry reactor work?
The membrane slurry reactor typically consists of a housing containing hollow fibre membranes and heat exchanger tubes. By using membranes with a pore diameter of 0.5 μm or smaller it is possible to use catalyst particles from about 1 μm without entrainment. The reactants and products are removed from the reactor via the hollow fibre membranes.
What are the disadvantages of a slurry reactor?
The catalyst for the slurry reactor is more susceptible to attrition. Due to the continuous circulation, the whole catalyst is exposed to the sulfur poisoning, unlike the case of fixed-bed reactors in which the top section acts as a guard bed.