Geactiveerd Alumina

De veelgebruikte vorm van het gebruik van aluminiumoxide als katalysator wordt "actief aluminiumoxide" genoemd. Het is een poreus en sterk verspreid vast materiaal met een groot oppervlak. Het microporeuze oppervlak bezi...
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Geactiveerd aluminiumoxide, ook bekend als geactiveerde aluminiumoxideparels, is een materiaal met een hoge adsorptiecapaciteit, thermische stabiliteit en chemische stabiliteit.

Het is gemaakt van aluminaat of aluminiumhydroxide als grondstof en wordt gevormd tot kleine bolvormige deeltjes onder omstandigheden met hoge temperaturen. De porositeit van deze deeltjes is meer dan 40%.

Activated aluminiumoxide heeft brede toepassingsmogelijkheden op het gebied van milieubescherming, energie en de chemische industrie.



The bereidingsmethoden van actief aluminiumoxide omvatten voornamelijk twee soorten: fysische methoden en chemische methoden.

Physical methode: Door gebruik te maken van hoge temperatuur, hoge druk en snelle rotatie, worden de aluminiumoxide- of aluminiumhydroxidedeeltjes onder specifieke omstandigheden omgezet in sferische deeltjes.

Het geactiveerde aluminiumoxide bereid door de fysische methode heeft de voordelen van een uniforme deeltjesgrootteverdeling en een glad oppervlak.

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Chemical methode: Met behulp van methoden zoals sol-gel-methode, hydrothermale methode en co-precipitatiemethode kunnen sferische deeltjes Het geactiveerde aluminiumoxide bereid door de chemische methode heeft de voordelen van een completere poriestructuur en een meer uniforme poriegrootteverdeling.


2. Eigenschappen van actief aluminium Oxide

The actief aluminiumoxide heeft een hoog specifiek oppervlak en porositeit, en er zijn een groot aantal zuurstofvacatures op het oppervlak, waardoor het sterke adsorptie- en katalytische eigenschappen heeft.

Meanwhile bezit het geactiveerde aluminiumoxide ook een uitstekende weerstand tegen hoge temperaturen en chemische stabiliteit en wordt het niet gemakkelijk geërodeerd door water, zuren, logen en andere chemische stoffen.

Therefore, geactiveerd aluminiumoxide heeft brede toepassingsmogelijkheden op gebieden zoals adsorptie, katalyse en scheiding.

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3. Toepassingen van actief aluminiumoxide

(1) Adsorptiematerialen: geactiveerd aluminiumoxide heeft uitstekende adsorptie-eigenschappen en kan worden gebruikt in gebieden zoals luchtzuivering, waterbehandeling en afvalgasbehandeling.

Het gebruik van geactiveerd aluminiumoxide als adsorptiemiddel voor afvalgasbehandeling kan bijvoorbeeld effectief schadelijke gassen verwijderen zoals zwaveldioxide en stikstofoxides.

(2) Katalysatordrager: geactiveerd aluminiumoxide wordt gebruikt als katalysatordrager, wat de katalytische activiteit en selectiviteit van de katalysator kan verbeteren.

In de petrochemische industrie wordt geactiveerd aluminiumoxide bijvoorbeeld vaak gebruikt als katalysatordrager, omdat het wordt gebruikt bij reacties zoals hydrogenering, dehydrogenering en scheuren.

(3) Scheidingsmateriaal: geactiveerd aluminiumoxide heeft een hoog specifiek oppervlak en porositeit en kan worden gebruikt voor de bereiding van scheidingsmaterialen.11727798400 waterstofperoxideEigenschappen van actief aluminiumoxide droogmiddelActief aluminiumoxide fluorideverwijderingKristallijne faseγ-Al2O3x-Al2O3
Dimension ( mm ) 7 ~ 14mesh Φ3 ~ 5, Φ4 ~ 6, Φ5 ~ 7Φ3 ~ 5, Φ4 ~ 6, Φ5 ~ 7, Φ8-10Φ1.5 ~ 2, Φ4 ~ 3, Φ4 ~ 6, Φ5 ~ 7appearanceWitte bolvormige vormWitte bolvormige vormWitte bolvormige shapeDensity
g / cm3 )0.68-0.750.68 ~ 0.890.75Sterkte ( N / ) > 50 > 13050 ~ 80Specifiek oppervlak ( m2 / g ) 200 ~ 260280 ~ 360280 ~ 360Pore Volume ( cm3 / g ) 0.40 ~ 0.460.38 ~ 0.400.4Big Pore ( > 750A ) 0. 14

water absorptie (% ) > 50

Static adsorptiecapaciteit ( RH% ) voor fluorine
( mgF / g Al23 O).

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