Kugwiritsa ntchito ndi kaphatikizidwe wa ZSM-5 molecular sieve

I. Chiyambi

ZSM-5 molecular sieve ndi mtundu wa zinthu zazing'ono zomwe zimakhala ndi mawonekedwe apadera, zomwe zakhala zikugwiritsidwa ntchito kwambiri m'magawo ambiri chifukwa cha zabwino zake zotsatsa, kukhazikika komanso ntchito yothandiza. Mu pepalali, kugwiritsa ntchito ndi kaphatikizidwe ka molekyulu ya ZSM-5 kudzafotokozedwa mwatsatanetsatane.

Chachiwiri, kugwiritsa ntchito ZSM-5 molecular sieve

1. Chothandizira: Chifukwa cha acidity yayikulu komanso mawonekedwe apadera a pore a ZSM-5 molecular sieve, yakhala chothandizira kwambiri pamachitidwe ambiri amankhwala, monga isomerization, alkylation, dehydration, etc.
2. Adsorbent: ZSM-5 molekyulu sieve ali lalikulu pore voliyumu ndi zabwino adsorption ntchito, ndipo chimagwiritsidwa ntchito kulekana gasi, madzi kulekana ndi chothandizira chonyamulira ndi zina.
3. Chonyamulira chothandizira: chingagwiritsidwe ntchito ngati chothandizira chothandizira kukonza ntchito ndi kukhazikika kwa chothandizira.

Kaphatikizidwe wa ZSM-5 molecular sieve

The synthesis wa ZSM-5 maselo sieve zambiri utenga Chinsinsi njira, amene amalamulira ndondomeko kaphatikizidwe ndi kulamulira kutentha, kuthamanga, yaiwisi chiŵerengero ndi zinthu zina. Pakati pawo, zopangira zomwe zimagwiritsidwa ntchito kwambiri ndi sodium silicate ndi sodium aluminate.

1. Kulamulira kwa chiŵerengero cha silika-aluminium: chiŵerengero cha silica-aluminium ndi chimodzi mwazinthu zofunika kwambiri za ZSM-5 molecular sieve, zomwe zingathe kulamulidwa mwa kusintha chiŵerengero cha sodium silicate ndi sodium aluminate. Kukwera kwa chiŵerengero cha silicon ndi aluminiyamu, chimango cha molecular sieve chomwe chimapangidwira chimakhala cha silicon, ndi mosemphanitsa.
2. Kutentha kwa kaphatikizidwe ndi kupanikizika: kutentha kwa kaphatikizidwe ndi kupanikizika ndizofunikiranso zomwe zimakhudza mapangidwe a maselo a ZSM-5 sieve. Nthawi zambiri, kutentha kwambiri ndi kupanikizika kumapangitsa kuti mapangidwe a maselo a ZSM-5 apangidwe.
3. Nthawi ya crystallization ndi kutentha kwa crystallization: nthawi ya crystallization ndi kutentha kwa crystallization ndizofunikira zomwe zimakhudza mapangidwe a ZSM-5 molecular sieve. Mapangidwe a mapangidwe ndi chiyero cha ZSM-5 sieve ya molekyulu idasinthidwa ndikuwonjezera kutentha kwa crystallization pa nthawi yoyenera ya crystallization.
4. Zothandizira zopangira: Nthawi zina kuti musinthe pH mtengo kapena kulimbikitsa ndondomeko ya crystallization, m'pofunika kuwonjezera zina zothandizira, monga NaOH, NH4OH, ndi zina zotero.

Iv. Mapeto

Monga chinthu chofunika kwambiri cha microporous, ZSM-5 molecular sieve ili ndi chiyembekezo chogwiritsa ntchito. Ndikofunikira kumvetsetsa kaphatikizidwe kagwiritsidwe ntchito kake. Poyang'anira kaphatikizidwe, kapangidwe ka pore, acidity ndi zida zothandizira za ZSM-5 molecular sieve zitha kuyendetsedwa bwino, zomwe zimapereka mwayi wogwiritsa ntchito m'magawo osiyanasiyana.