Modelling of a post-discharge reactor used for plasma sterilization

• Type: Article in International Conference Proceedings Book
• Date: 2006

Authors

Kutasi, K (Author) Other; Carlos Daniel Diogo Matias Pintassilgo (Author) FEUP; Coelho, PJ (Author) Other; Loureiro, J (Author) Other

Conference proceedings International

Title: PHYSICS OF IONIZED GASES

Pages: 224-231

23rd Summer School and International Symposium on Physics of Ionized Gases

Natl Park Kopaonik, SERBIA, AUG 28-SEP 01, 2006

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Other information

Authenticus ID: P-004-QGT

DOI: 10.1063/1.2406032

Abstract (EN): A three dimensional hydrodynamic model is developed to simulate a post-discharge reactor placed downstream from a flowing microwave discharge in N-2-O-2 used for plasma sterilization. The temperature distribution and the density distributions of NO((BII)-I-2) molecules and O(P-3) atoms, which are known to play a central role in the sterilization process, are obtained in the reactor in the case of discharges at p=8 Torr, f=915 MHz and p=2 Torr, f=2450 MHz, and N-2-2%O-2 mixture composition. Excluding the flow direction, sufficiently low temperatures ideal for sterilization have been found in most part of the reactor. The highest NO(B) and O(P-3) concentrations at the reactor entrance are achieved at the highest pressure values here investigated. However, these larger densities rapidly decrease within a few centimeters below the values obtained at lower pressure. On the contrary, at low pressure the density distributions of NO(B) and O(P-3) are quasi homogenous in most of the horizontal planes.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8