{"id":3518,"date":"2014-07-04T10:05:24","date_gmt":"2014-07-04T10:05:24","guid":{"rendered":"https:\/\/sercalia.com\/fr\/tamiz-molecular\/"},"modified":"2026-01-21T09:11:45","modified_gmt":"2026-01-21T09:11:45","slug":"tamis-moleculaire","status":"publish","type":"page","link":"https:\/\/sercalia.com\/fr\/tamis-moleculaire\/","title":{"rendered":"Tamis Mol\u00e9culaire"},"content":{"rendered":"

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Produits absorbeurs<\/a> | Absorbeur d’humidit\u00e9<\/a> | Tamis Mol\u00e9culaire<\/p>\n

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Le tamis mol\u00e9culaire est un dessiccant \u00e0 action rapide offrant des performances \u00e9lev\u00e9es dans des conditions environnementales extr\u00eames.<\/h2>\n

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Description<\/h3>\n

Le dessicant tamis mol\u00e9culaire est un aluminosilicate, <\/strong>d\u00e9shydratant \u00e0 action rapide. Il a une ouverture de pore efficace d\u2019environ 4 angstr\u00f6ms (0,4 nm). La formule typique est Na2O.Al2O3.2Sio2.nH2O.<\/p>\n

Le tamis mol\u00e9culaire absorbe<\/strong> l’humidit\u00e9 r\u00e9siduelle. Il est le d\u00e9shydratant qui agit le plus rapidement<\/strong>, et permet d’obtenir des environnements avec une humidit\u00e9 relative la plus basse. En outre, si les conditions de temp\u00e9rature ext\u00e9rieure et l’humidit\u00e9 varient c\u2019est le produit d\u00e9shydratant qui maintient sans \u00e9jecter l’eau absorb\u00e9e dans des conditions extr\u00eames (par opposition au gel de silice ou les argiles d\u00e9shydratants qui dans des conditions extr\u00eames expulseront l’eau absorb\u00e9e plus facilement).<\/p>\n

La degr\u00e9 standard 4A-401 est g\u00e9n\u00e9ralement utilis\u00e9 en tant que dess\u00e9chant, tandis que d’autres degr\u00e9s (4A-402, 4A-403, etc.) avec certaines propri\u00e9t\u00e9s am\u00e9lior\u00e9es existent pour des t\u00e2ches sp\u00e9cifiques.<\/p>\n

Applications<\/h3>\n

Utilis\u00e9 pour le s\u00e9chage<\/strong> g\u00e9n\u00e9ral et la purification<\/strong> des fluides d’hydrocarbures tels que le gaz naturel, le GPL, l’air, les gaz atmosph\u00e9riques et inertes, l’\u00e9limination<\/strong> du dioxyde de carbone, de l’ammoniac et de l’\u00e9thanol \u00e0 partir des courants de fluides et d’autres qualit\u00e9s particuli\u00e8res utilis\u00e9es pour le s\u00e9chage des r\u00e9frig\u00e9rants et le s\u00e9chage \u00e0 l’air des freins d\u2019air.<\/p>\n

En outre, il utilise comme d\u00e9shydratant de conteneurs et la d\u00e9shydratation de l’air dans les unit\u00e9s de verre isolant. Le tamis mol\u00e9culaire 4A absorbe des mol\u00e9cules d\u2019un diam\u00e8tre cin\u00e9tique inf\u00e9rieur \u00e0 0,4 nm, et exclut ceux d\u2019un diam\u00e8tre sup\u00e9rieur.<\/p>\n

Le tamis mol\u00e9culaire peut \u00e9galement \u00eatre utilis\u00e9 pour conserver les produits congel\u00e9s et pour rendre les adh\u00e9sifs plus durables.<\/p>\n

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Tamis mol\u00e9culaire. Sp\u00e9cifications<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
Diam\u00e8tre nominal des pores<\/td>\n4 angstroms (0,4 nm)<\/td>\n<\/tr>\n
Type de structure cristaline<\/td>\ncubique<\/td>\n<\/tr>\n
Densit\u00e9 apparente<\/td>\n740 g\/l<\/td>\n<\/tr>\n
Capacit\u00e9 d’\u00e9quilibre dans l’eau \u00e0 20\u00baC\/55% h.r.<\/td>\n22% wt.<\/td>\n<\/tr>\n
Teneur en eau (tass\u00e9)<\/td>\n1,5% wt. (max.)<\/td>\n<\/tr>\n
L’absorption de chaleur (max.)<\/td>\n4.200 KJ\/kg eau<\/td>\n<\/tr>\n
Chaleur sp\u00e9cifique (environ)<\/td>\n1,07 KJ\/kg\u00baC<\/td>\n<\/tr>\n
Taille de grains (nominal)<\/td>\n2,5-5 mm \/ 2-3 mm \/ 1-2 mm<\/td>\n<\/tr>\n
Taille de grains (equivalent)<\/td>\nmaille 4×8 \/ maille 8×12 \/ maille 10×18<\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 l’\u00e9crasement<\/td>\n7 kp \/ 4 kp \/ 2 kp<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/h3>\n

Tamis mol\u00e9culaire. Approvisionnement<\/h3>\n

Ils sont servis de mani\u00e8re standard dans le type d’emballage suivant, dans des sacs interieur en poly\u00e9thyl\u00e8ne<\/p>\n