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Cyclodextrins BTEX filters

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Cyclodextrins BTEX filters

Development of tools for the filtration of gas emission of automotive, based on functionalized B-cyclodextrin for the removal of nanometric particles (BTEX).

Team
L’Albero Azzurro
Silvia Palmieri , Francesca Bompadre Mattia Camposilvan, Silvia Mazzoni, Felice Dattoli, Lorenzo Di Carlantonio
Contact details
m.berzano@staff.univpm.it

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Cyclodextrins BTEX filters

Development of tools for the filtration of gas emission of automotive, based on functionalized B-cyclodextrin for the removal of nanometric particles (BTEX).

Solution context

The main source of urbans pollution is determined by automotive’s gas exhausted because of the presence of BTEX (benzene, toluene, etilbenzene and xilen) and particulates. This kind of pollutants are toxic not only for the environment, but also for the human health (specially BTEX because of their nanosize). At the moment the real problem is that even if an automotive can respect new requirement of Euro (i.e. Euro 6 standards= 170 mg/km for total hydrocarbons HC+CO), the concentration of BTEX emitted is superior than the admitted value (especially if there are old transports that do not respect these new limits). Fabrication of filter to insert inside the muffler of automotive can be a solution that aspires to reduce the nano pollutants emitted by automotive exhausted gas

Solution description

Cyclodextrins (Cyds) are a type of molecule with a structure similar to a cone, to permits the bond with another molecule on the model of key-locks. This term describes a high specific bond between two similar molecules. The structure of Cyds makes the molecule a kind of pocket that can be selective and specific functionalized thanks to the presence of internal hydroxilic group, so for instance with a methylation it is possible to create an hydrophobic environment to bond molecules as BTEX.

One of the main advantages of Cyds is that they can be easily synthetized from starch. Starch can be recovered from food waste, such as potatoes peel.

So, this kind of material is a very low cost and widely available one. Moreover it could give a new value to a waste product.

For the production of the filter, Electrospinning could be an attractive technology, also because it is a low cost solution.

Since it is possible thanks to the electrospinning technique, to obtain a filter composed of nanofibers, these can be easily disposed as fillers for reinforced mortars.

In this way, the impact of BTEX on human health is removed because it has been inerted.

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