Which equipment is used for gas absorption mass transfer operation?

Which equipment is used for gas absorption mass transfer operation?

A gas–liquid contactor is a particular chemical equipment used to realize the mass and heat transfer between a gas phase and a liquid phase.

What is an agitated vessel?

Abstract. Agitated vessels (or mechanically stirred reactors) are heat exchange devices that are most widely used in many chemical and biochemical process industries, such as anaerobic digestion process.

How does gas absorption work?

Absorption, or gas absorption, is a unit operation used in the chemical industry to separate gases by washing or scrubbing a gas mixture with a suitable liquid. One or more of the constituents of the gas mixture dissolves or is absorbed in the liquid and can thus be removed from the mixture.

What is a contactor vessel?

Contactor column is a vertical vessel that gas enters from its bottom and in moving upward contacts with water-absorbing media. From: Practical Engineering Management of Offshore Oil and Gas Platforms, 2016.

What are the different steps involved in absorption of gases?

There are two types of gas absorption: chemical and physical absorption. Chemical gas absorption- reaction between the absorbent and solute. Examples include using NaOH as an absorbent to dissolve acid gas, dissolving CO2 and H2S in aqueous solution of MEA.

Where is agitated vessel used?

Agitated vessels and tanks with heating and cooling arrangements are frequently used in the process industries as reactors, liquid mixers, crystallizers, etc.

What type of process is involved in gas absorption?

The process of gas absorption thus involves the diffusion of solute from the gas phase through a stagnant or non-diffusing liquid.

What is meant by mechanical agitation?

Mechanical agitation may be used to suspend particles in a liquid in order to promote mass transfer or a chemical reaction. The liquids involved in such applications are usually of low viscosity, and the particles will settle out when agitation ceases.

How does a contactor work?

Operating Principle of a Contactor:The current passing through the contactor excites the electromagnet. The excited electromagnet produces a magnetic field, causing the contactor core to move the armature. A normally closed (NC) contact completes the circuit between the fixed contacts and the moving contacts.

What is an agitated vessel for gas absorption?

An agitated vessel for gas absorption contains a few ‘internals’such as the gas sparger, baffles, and an agitator shaft with impellers. The gas is sparged below the impeller midway between the centre and the periphery of the impeller. It is dispersed in the form of small bubbles by the shear stress created by impeller rotation.

What is the KLA of gas-liquid mass transfer in mechanically agitated vessels?

Gas-Liquid Mass Transfer in Gassed Mechanically Agitated Vessels 185 0.046()0.53 0.52 KLa= Pg VVs(8.4-5) the deviation of this correlation is less than 3%. Fig. 8.4-7 show the comparison of KLa value for each impeller system with Eq.

What is mass transfer in an agitated vessel?

Mass transfer in agitated vessels usually involves dispersed gases absorbing into and often reacting with a continuous liquid phase, e.g., in oxidation or chlorination. Interfacial area and contact time depend on the operating conditions.

What is mechanical agitation used for?

Mechanical agitation may be used to suspend particles in a liquid in order to promote mass transfer or a chemical reaction.