Ama-molelisalar sievesziyizinto ezibalulekile zegesi kanye nokwehlukanisa okuwuketshezi kanye nokuhlanzwa ezimbonini ezahlukahlukene. Bayizinsimbi ze-crystalline ezinama-pores afanayo akhetha ama-molecule akhethiwe asuselwa ngosayizi nokwakheka kwawo. Le khasiInqubo yokukhiqiza yama-molefanelar sievesKubandakanya izinyathelo ezimbalwa eziyinkimbinkimbi zokuqinisekisa ukukhiqizwa kwezinto ezisezingeni eliphakeme ngosayizi othize we-pore kanye nezakhiwo.
Ukukhiqizwa kwama-molelisalar sives kuqala ngokukhethwa kwezinto ezingavuthiwe, kufaka phakathi izilindi ze-sodium, i-alumina namanzi. Lezi zinto zokwenziwa zihlanganiswa ngokulingana okunembile ukwakha i-gel eyi-homogeneous, esenziwa ngaphansi kwenqubo yokuhlanganiswa kwe-hydrothermal. Kulesi sinyathelo, ijeli lifuthelwa amazinga okushisa aphezulu phambi kwe-alkaline izinto ukukhuthaza ukwakheka kwesakhiwo sekristalu nge-pores yomfaniswano.
Isiteji esiseduze senqubo yokukhiqiza i-Ion Exchange, ehilela ukufaka esikhundleni se-sodium ion ngesakhiwo sekristalu nezinye izintambo ezifana ne-calcium, potassium noma i-magnesium. Le nqubo yokushintshaniswa kwe-Ion ibalulekile ekuqondiseni ukusebenza kwama-molefanelar sieves, kufaka phakathi amandla we-adsorption kanye nokukhetha. Uhlobo lwe-cation olusetshenziselwa i-ion ukushintshana luncike kwizidingo ezithile zesicelo sesihluthuli somoya.
Ngemuva kwe-Ion Exchange, ama-molelisar sieves athola uchungechunge lokugeza nokuhlanza izinyathelo ukususa noma yikuphi ukungcola namakhemikhali asele asele kwinqubo yokukhiqiza. Lokhu kuqinisekisa ukuthi umkhiqizo wokugcina uhlangabezana namazinga okuhlanzeka asontekile adingekayo ezinhlalulweni zezimboni. Ngemuva kokuthi inqubo yokuwasha nokusoma isiqediwe, ama-molefanelar sieves athwebulwe emazingeni okushisa aphezulu ukuze aqinise isakhiwo se-crystal futhi asuse noma yiziphi izinhlanganisela ze-organic ezisele.
Isinyathelo sokugcina kwinqubo yokukhiqiza ibandakanya ukwenza kusebenze ama-molefanelar sieves ukuze uwalungiselele izinhlelo zokusebenza ze-adsorption. Le nqubo yokwenza kusebenze imvamisa ifaka ukushisaisihlungo se-molecularEmazingeni okushisa aphezulu ukuze asuse umswakama futhi athuthukise izakhiwo zawo ze-adsorption. Isikhathi kanye nokushisa kwenqubo yokwenza kusebenze ngokucophelela kulawulwa ngokucophelela ukuze kufezeke usayizi owufunayo we-pore kanye nendawo engaphezulu kwesihlungo se-moleculal.
Amavie ama-molelisar atholakala ngosayizi ohlukile we-pore, kufaka phakathi i-3A, 4A no-5A, ngamunye alungele izinhlelo ezithile. Ngokwesibonelo,3A ama-molelisalar sieveszivame ukusetshenziselwa ukomisa kwamagesi noketshezi, kuyilapho4a nama-5A ama-molelisalar sieveszithandwa ngama-molekyuli amakhulu apholisa kanye nokususa ukungcola okufana namanzi kanye nekhabhoni diok dioxide.
Ngokufingqa, ukukhiqizwa kwama-molecular sieves kuyinqubo eyinkimbinkimbi futhi eyinkimbinkimbi ehilela izinyathelo ezimbalwa ezibalulekile, kufaka phakathi ukuhlanganiswa kwe-hydrothermal, ukushintshana kwe-ini, ukugeza, ukomisa. Lezi zinyathelo zilawulwa ngokucophelela ukuze zikhiqizeama-molelisalar sievesNgezakhiwo ezenziwe ngezifiso kanye nosayizi we-pore ukuhlangabezana nezidingo ezahlukahlukene zezimboni ezinjenge-Petrochemical, Emakhemisi nezemvelo yegesi. Ikhwalithi ephezuluKuhlelwa amangqamuzana amangqamuzanaNgabakhiqizi abadumile badlala indima ebalulekile ekufezekiseni izinqubo zokuhlukaniswa okusebenzayo kanye nokuhlanza ezinhlelweni ezahlukahlukene zezimboni.
Isikhathi Sokuthumela: APR-19-2024