Analyze with us the best technologies designed for VOCs abatement!
In a previous article (click here to read it) we examined the VOCs; in particular, we saw the meaning of the term, by which classes of compounds are characterized and environmental / health problems they can create.
From these considerations, questions arise spontaneously. How is it possible to intervene in industrial processes to break down the VOCs? What technologies do we have?
The goal of this article is just to give an answer to these questions. We will examine the various technologies available and how they can be used in industrial processes.
Let’s start with an interesting solution: the active carbon filtration, based on the chemical and physical process of adsorption.
The adsorption is a very important phenomenon, which allows the accumulation of substances on a solid surface. Specifically, between the molecules present in the fluid phase and the solid surface are generated of intermolecular bonds (physical adsorption) or covalent / ionic bonds (chemical adsorption).
This phenomenon allows a separation of the molecules of interest from the fluid phase, until the surface of the solid material is fully saturated.
So, what material should be used for this application? At an intuitive level, we can deduce that the adsorption of chemical species is more favored the greater is the contact surface between the same molecules and the solid. It is necessary therefore the use of a material characterized by high porosity and a high specific surface area (per unit of volume).
An excellent material that meets these requirements is the activated carbon. This substrate is first generated by a high carbon content, by means of chemical or gas activation processes.
Placing the active carbon within a suitable apparatus, and by imposing the passage of the gas stream through the coal itself, it realizes the separation of the VOC present in the fluid phase. This is the principle behind the activated carbon filter.
On the basis of this technology, Tecnosida® has realized the Chemsorb® filter, used with success in various applications like:
We have examined the adsorption phenomenon, which typically involves a fluid phase and a solid phase. What if instead we consider two fluid phases, specifically a gas and a liquid? Even in this case it can take place an exchange of matter, according to a physical phenomenon called absorption. Let’s examine it in more detail, with the equipment that uses the operation: the wet scrubber.
The absorption consists in the passage of chemical species from a gaseous phase to a liquid phase. In the analysis of this phenomenon it is of highly importance to consider two different aspects:
On the basis of the considerations made, now are built equipment that promote an effective contact between the gaseous phase and the liquid phase, with the purpose of transferring the polluting species. This type of equipment is called wet scrubber.
The embodiments for wet scrubbers are different, and are strongly based on testing and calibration of the most effective conditions. Tecnosida® has developed considerable know-how, which has enabled it to develop WETCLEAN, a wet scrubber design on the specific needs of your production process. See how we applied WETCLEAN in a production process, to reduce VOCs and dust.
Until now we have talked about absorption and adsorption, which allow you to remove molecules from the initial gas stream.
Are there technologies that, instead of exploiting the removal of the compounds, are based on the transformation of the same compounds into harmless molecules?
The answer is yes, and a technology that takes advantage of this principle is the thermal oxidation applying our Oxither.
The thermal oxidizer allows to transform the VOCs in the classic of the total combustion products (carbon dioxide and water), and other by-products due to the types of atoms present in the molecules to be treated. Combustion is an exothermic process, and tends to occur spontaneously when the composition of the air / fuel mixture is within flammable limits.
This condition is very dangerous so for this reason all the combustion processes are taken into a strictly controlled to avoid problems and keep the process safe.
In particular, thermal oxidizer appears to be composed of:
It is important to highlight the fact that the thermal oxidizer is an appropriate solution if:
Therefore, we analyzed after thermal combustion, active carbon filtration and wet filtration. What other technologies are available for VOCs?
Are there any specific equipment that allow you to treat a particular class of VOCs: odorous molecules. These species frequently have an unpleasant impact on the olfactory and cause complaints from those living near the release site. We will see what new items are the odorous molecules and what are the technologies that are useful to treat them.
See you soon with new valuable information!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
Analyze with us the best technologies designed for VOCs abatement!
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