iisefu ze-molecular, zeolite ZSM-23

I-Zeolites liqela leeminerali ezenzeke ngokwemvelo eziye zasetyenziswa ngokubanzi kwizicelo ezahlukeneyo zoshishino ngenxa yeempawu zazo ezizodwa. Phakathi kweentlobo ezahlukeneyo ze-zeolite, i-ZSM-23 ivelele njenge-sieve ye-molecular esebenza kakhulu kunye noluhlu olubanzi lwezicelo kwi-petrochemical and chemical industry. Kweli nqaku, siza kuphonononga iimpawu, i-synthesis, kunye nokusetyenziswa kwe-ZSM-23, ukukhanya ngokubaluleka kwayo kwintsimi ye-catalysis kunye ne-adsorption.

I-Zeolite i-crystalline aluminosilicate minerals kunye nesakhiwo esiqhekezayo kunye nommandla ophezulu. Ezi zakhiwo zibenza babe ngabaviwa abagqwesileyo kwizicelo ezifana ne-adsorption, i-ion exchange, kunye ne-catalysis. I-ZSM-23, ngokukodwa, luhlobo lwe-zeolite eyaziwayo ngesakhiwo sayo esiyingqayizivele se-pore kunye nokukhetha okuphezulu kwiimolekyuli ezithile. Iimpawu zayo ze-molecular sieve zenza ukuba ibe yinto ebalulekileyo yokwahlula kunye nokucoca iikhompawundi ezahlukeneyo kwiinkqubo zoshishino.

I-synthesis ye-ZSM-23 ibandakanya ukusetyenziswa kwee-precursors ezithile kunye neemeko zokusabela ukulawula ukubunjwa kwe-crystalline structure. Ngokuqhelekileyo, i-ZSM-23 ixutywe ngokusebenzisa inkqubo ye-hydrothermal, apho umxube we-alumina, i-silica, kunye ne-agent-directing agent ixhomekeke kumaqondo aphezulu kunye noxinzelelo. Isiphumo se-crystalline siphathwa ngokucokisekileyo ukususa nakuphi na ukungcola kunye nokwandisa iimpawu zayo kwizicelo ezithile.

Enye yeempawu eziphambili ze-ZSM-23 yisakhiwo sayo se-microporous, equkethe iziteshi ezidibeneyo kunye neekheji zemilinganiselo echanekileyo. Esi sakhiwo siyingqayizivele sivumela i-ZSM-23 ukuba ikhethe iimolekyuli ze-adsorb ngokusekelwe kubukhulu kunye nokuma kwazo, okwenza kube yinto efanelekileyo kwiinkqubo zokwahlula. Ukongeza, ubume be-acidic bomphezulu we-ZSM-23's buyenza ukuba ikwazi ukwenza iikhemikhali ezahlukeneyo, yandise ukusetyenziswa kwayo kwiinkqubo zoshishino.

Kwishishini le-petrochemical, i-ZSM-23 isetyenziswa ngokubanzi njenge-catalyst yokuguqulwa kwee-hydrocarbons kwiimveliso ezixabisekileyo ezifana ne-petroli kunye ne-petrochemical intermediates. Ukukhethwa kwayo okuphezulu kwiimolekyuli ezithile ze-hydrocarbon kuyenza ibe yinto ebalulekileyo kwiinkqubo ezifana nokuqhekeka kwe-catalytic kunye ne-hydrocracking, apho ukuguqulwa okusebenzayo kwe-feedstocks kwiimveliso ezifunwayo kubalulekile ekusebenzeni ngokupheleleyo komsebenzi.

Ngapha koko, i-ZSM-23 idlala indima ebalulekileyo ekuvelisweni kweekhemikhali ezintle kunye neziphakathi zamayeza. Ukukwazi kwayo ukukhetha i-adsorb kunye ne-catalyze iimolekyuli ezithile kuyenza ibe sisixhobo esixabisekileyo sokwenziwa kwezinto ezintsonkothileyo zezinto eziphilayo ezinobunyulu obuphezulu kunye nesivuno. Ukongeza, i-ZSM-23 isetyenziselwa ukucocwa kweegesi kunye nolwelo, apho iipropathi zayo zokuhluza iimolekyuli zivumela ukususwa kobumdaka kunye nongcoliseko kwimisinga eyahlukeneyo.

Ukuguquguquka kwe-ZSM-23 kunabela kwizicelo zokusingqongileyo ngokunjalo. Ukusetyenziswa kwayo njengento ebangela ukunyangwa kweegesi zokukhupha kunye nokususwa kwezinto ezingcolileyo ezivela kumanzi amashishini kubonisa ukubaluleka kwayo ekujonganeni nemingeni yokusingqongileyo. Ngokuququzelela ukuguqulwa kwezinto ezikhutshwayo ezinobungozi kwiikhompawundi ezingenabungozi, i-ZSM-23 inegalelo ekunciphiseni ungcoliseko lomoya kunye nokukhuselwa kwendalo.

Kwindawo yamandla avuselelekayo, i-ZSM-23 ibonise isithembiso kwimveliso ye-biofuels ngokusebenzisa ukuguqulwa kwe-catalytic ye-feedstocks-derived biomass. Isakhono sayo sokuguqula ngokukhethiweyo iinxalenye ezithile ze-biomass zibe ngamafutha axabisekileyo kunye neekhemikhali zihambelana nomdla okhulayo kwimithombo yamandla ezinzileyo kunye nokusingqongileyo.

Iipropati eziyingqayizivele ze-ZSM-23 nazo ziye zatsala ingqalelo kwintsimi ye-nanotechnology, apho ukusetyenziswa kwayo njengethemplate yokwenziwa kwezinto ezenziwe nge-nanostructured kuye kwahlolwa. Ngokusebenzisa ubume obuchanekileyo be-pore ye-ZSM-23, abaphandi baye bakwazi ukwenza i-nanomaterials ye-novel eneepropati ezilungiselelwe usetyenziso kwi-electronics, i-catalysis, kunye nokugcinwa kwamandla.

Ukuqukumbela, i-ZSM-23 igqame njengesefa esebenza kakuhle kakhulu yemolekyuli enokusetyenziswa ngeendlela ezahlukeneyo kumashishini epetrochemical, ekhemikhali, nakumashishini okusingqongileyo. Ubume bayo obukhethekileyo bepore, izakhono ezikhethiweyo zokubhengeza, kunye neempawu ze-catalytic ziyenza ibe yimathiriyeli eyimfuneko kwiinkqubo ezahlukeneyo zamashishini. Njengoko uphando kunye nophuhliso kummandla wee-zeolites luqhubeka luqhubela phambili, amandla okwenziwa kwezinto ezintsha kunye nokusetyenziswa kwe-ZSM-23 kuyathembisa, kuvula indlela yokubaluleka kwayo okuqhubekayo ekujonganeni neemfuno eziguqukayo zamashishini anamhlanje.