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catalyst pitch

French translation: espace entre les plaques du catalyseur

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
English term or phrase:catalyst pitch
French translation:espace entre les plaques du catalyseur
Entered by: vfouet

19:36 Nov 14, 2011
English to French translations [PRO]
Tech/Engineering - Energy / Power Generation
English term or phrase: catalyst pitch
Traduction de spécifications concernant un système de dénitrification SCR

"Appropriate catalyst pitch is important to avoid ash deposits and bridges over catalyst cells and pores"

J'ai trouvé le terme de "brai" mais j'ai quelque doute dans ce contexte.

Merci d'avance de votre aide.
vfouet
Local time: 04:42
espace entre les plaques du catalyseur
Explanation:
extrait d'une explication très détaillée (voir site)
Les fumées chargées de NH3 traversent ensuite un catalyseur à plusieurs lits dans une plage de températures comprises entre 250 et 380°C. (...) Du point de vue géométrique, le réacteur catalytique se présente généralement sous forme de plaques ou de nid d’abeille (...) on peut régler l’espace entre plaques et leur hauteur.
Selected response from:

Leïla Fressy-Parvin
France
Local time: 04:42
Grading comment
Merci !
4 KudoZ points were awarded for this answer



Summary of answers provided
4 +2espace entre les plaques du catalyseur
Leïla Fressy-Parvin
4le pas des cellules du catalyseur
FX Fraipont (X)


Discussion entries: 1





  

Answers


11 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +2
espace entre les plaques du catalyseur


Explanation:
extrait d'une explication très détaillée (voir site)
Les fumées chargées de NH3 traversent ensuite un catalyseur à plusieurs lits dans une plage de températures comprises entre 250 et 380°C. (...) Du point de vue géométrique, le réacteur catalytique se présente généralement sous forme de plaques ou de nid d’abeille (...) on peut régler l’espace entre plaques et leur hauteur.


    Reference: http://www.energie-plus.com/news/fullstory.php/aid/1376.
Leïla Fressy-Parvin
France
Local time: 04:42
Specializes in field
Native speaker of: Native in FrenchFrench
PRO pts in category: 12
Grading comment
Merci !

Peer comments on this answer (and responses from the answerer)
agree  GILLES MEUNIER
36 mins
  -> Merci Gilles
agree  Eric Le Carre
1 day 1 hr
  -> Merci Eric
Login to enter a peer comment (or grade)

12 hrs   confidence: Answerer confidence 4/5Answerer confidence 4/5
le pas des cellules du catalyseur


Explanation:
"Honeycomb structure 20 shown in Fig. 2 is disposed in tube 10. Structure 20 has upper- and lower-course end faces which extend at right angles to the axial direction. It also includes a number of cells 21 which allow the combustion gas to flow from the upper-course end face to the lower-course end face, and cause the gas to come into satisfactory contact with a catalyst. The honeycomb structure is formed of a ceramic material, e.g., cordierite, in order to be able to be fully impregnated with the catalyst. Cells 21 are arranged at a density of 16 to 32 per centimetre square (100 to 200 to one inch square).
The pitch of cells 21 ranges from 1.5 to 1.8 mm."
http://ip.com/patent/EP0382335B1

"Catalyst Pitch
Catalyst pitch is a term used in association with honeycomb and metal plate catalyst
and affects the flue gas velocity in interstitial spaces [1]. As shown in Figure 2.5 pitch,
represented as p, is the width of the catalyst cell plus the cell wall thickness, a. For a given flow rate, wider pitch will result in lower interstitial gas velocities. Appropriate catalyst pitch is important to assure that ash will not deposit and bridge over catalyst cells and pores. Plugging of the catalyst reduces the effective surface area by decreasing the number of active sites available for the NOx reduction reaction."
www.epa.gov/ttn/catc/dir1/cs4-2ch2.pdf

"Honeycomb catalytic apparatus - EP 0382335 B1 - IP.com
http://ip.com/patent/EP0382335B1Cached
Dispositif de catalyseur en nid d'abeilles comprenant : ... direction axiale et une pluralité de cellules (21) permettant au fluide de s'écouler ... de la structure en nid d'abeilles puisse d'écouler vers l'aval et le pas des passages ..."


FX Fraipont (X)
Belgium
Local time: 04:42
Specializes in field
Native speaker of: Native in FrenchFrench
PRO pts in category: 494
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