Ukusetshenziswa kanye nokuhlanganiswa kwe-ZSM-5 ye-molecular sieve

I. Isingeniso

I-ZSM-5 i-molecular sieve iwuhlobo lwe-microporous material enesakhiwo esiyingqayizivele, esiye sasetshenziswa kabanzi emikhakheni eminingi ngenxa yezakhiwo zayo ezinhle zokukhanga, ukuzinza kanye nomsebenzi we-catalytic. Kuleli phepha, ukusetshenziswa kanye nokuhlanganiswa kwe-ZSM-5 ye-molecular sieve izokwethulwa ngokuningiliziwe.

Okwesibili, ukusetshenziswa kwe-ZSM-5 ye-molecular sieve

1. I-Catalyst: Ngenxa ye-asidi ephezulu kanye nesakhiwo se-pore esiyingqayizivele se-ZSM-5 ye-molecular sieve, isibe yi-catalyst enhle kakhulu yokusabela kwamakhemikhali amaningi, njenge-isomerization, alkylation, dehydration, njll.
2. I-Adsorbent: I-ZSM-5 i-molecular sieve inomthamo omkhulu we-pore nokusebenza okuhle kwe-adsorption, futhi isetshenziswa kabanzi ekuhlukaniseni igesi, ukuhlukaniswa kwe-liquid kanye ne-catalyst carrier kanye neminye imikhakha.
3. Isithwali se-Catalyst: singasetshenziswa njengesithwali se-catalyst ukuze kuthuthukiswe umsebenzi nokuzinza kwe-catalyst.

Ukuhlanganiswa kwe-ZSM-5 ye-molecular sieve

I-synthesis ye-ZSM-5 ye-molecular sieve ngokuvamile isebenzisa indlela yesifanekiso, elawula inqubo yokuhlanganiswa ngokulawula izinga lokushisa, ingcindezi, isilinganiso sempahla eluhlaza kanye nezinye izimo. Phakathi kwazo, izinto ezisetshenziswa kakhulu zokusetshenziswa yi-sodium silicate ne-sodium aluminate.

1. Ukulawulwa kwesilinganiso se-silica-aluminium: isilinganiso se-silica-aluminium singenye yemingcele ebalulekile ye-ZSM-5 ye-molecular sieve, engalawulwa ngokulungisa isilinganiso se-sodium silicate ne-sodium aluminate. Ukuphakama kwesilinganiso se-silicon ne-aluminium, uhlaka lwe-molecular sieve olwakhiwe luthambekele kakhulu ku-silicon, futhi ngokuphambene nalokho.
2. Ukushisa kwe-synthesis nokucindezela: izinga lokushisa lokuhlanganiswa kanye nokucindezela nakho kuyizici ezibalulekile ezithinta ukwakheka kwe-ZSM-5 ye-molecular sieve. Ngokuvamile, amazinga okushisa aphezulu kanye nezingcindezi zenza kube lula ukwakheka kwe-ZSM-5 ye-molecular sieves.
3. Isikhathi se-Crystallization kanye nokushisa kwe-crystallization: isikhathi se-crystallization kanye nokushisa kwe-crystallization yizici ezibalulekile ezithinta ukwakheka kwe-ZSM-5 ye-molecular sieve. Izinga lokubunjwa nokuhlanzeka kwe-ZSM-5 ye-molecular sieve kwathuthukiswa ngokwandisa izinga lokushisa le-crystallization ngesikhathi esifanele se-crystallization.
4. Izilekeleli zokwenziwa: Ngezinye izikhathi ukuze ulungise inani le-pH noma ukhuthaze inqubo ye-crystallization, kuyadingeka ukwengeza ezinye izilekeleli zokwenziwa, ezifana ne-NaOH, NH4OH, njll.

Iv. Isiphetho

Njengento ebalulekile ye-microporous, isisefo se-molecular ZSM-5 sinethuba elibanzi lokufaka isicelo. Kubalulekile ukuqonda indlela yokuhlanganisa yokusetshenziswa kwayo okubanzi. Ngokulawula izimo ze-synthesis, isakhiwo se-pore, i-acidity kanye nezakhiwo ze-catalytic ze-ZSM-5 ze-molecular sieve zingalawulwa ngokuphumelelayo, okunikeza amathuba amaningi okusetshenziswa kwawo emikhakheni ehlukahlukene.