Xa i-4a ye-molecular sieve ingapakishwanga ngokuqinileyo okanye indawo yokugcina yonakaliswe, indlela yokujongana nokufunxa kwamanzi kunye nokufuma?Namhlanje siza kuchaza umthamo we-adsorption we-molecular sieve kunye neendlela zonyango zokufunxa amanzi kunye ne-hygroscopicity.
Isihluzo semolekyuli sinamandla okwazi ukubhengeza.Ayinakufunxa amanzi kuphela, kodwa ikwafunxa ukungcola emoyeni.Ke ngoko, kwimveliso yemizi-mveliso, ihlala isetyenziselwa imisebenzi ye-adsorption, ngaloo ndlela idlala indima entle ekwahlukaneni kunye ne-adsorption.Kufuneka senze ntoni ukuba i-4a ye-molecular sieve igcinwe ngokungafanelekanga okanye imanziswe kakhulu ngexesha lokusetyenziswa?
1. Valaivalve yokungena engundoqo, tshintshela nje iisefu zemolekyuli zamatanki amabini ukwenzela i-adsorption, kwaye usebenzise umoya ongasemva kweesefu zemolekyuli ngaphandle kwamanzi ukuhlaziya iisefu zemolekyuli.Nangona kunjalo, xa iisefu ze-molecular ngaphandle kwamanzi zitshintshelwa ukusebenza, amanzi emva kwazo aya kungena kwiisefu ze-molecular ngaphandle kwamanzi.Ezi zihluzo zimbini zemolekyuli zombini ziqulethe amanzi, kwaye emva koko ziphinda zivelise enye kwenye.Ngokuvuselelwa kwe-adsorption, umxholo wamanzi uyancipha, kwaye ekugqibeleni ufezekise i-adsorption ngaxeshanye.
2.Ngqoukufudumeza kunye nokomisa i-4a ye-molecular sieve ukuyikhupha ngokukhawuleza kwaye ibuyisele amandla ayo e-adsorption;Nangona kunjalo, emva kokuba ubuninzi bamanzi bungena kwi-molecular sieve, xa usebenzisa le ndlela ingentla ukuhlaziya, zombini i-molecular sieves iya kuvelisa umthamo omkhulu wamanzi, zombini ziya kuphinda zihlaziye kwaye ekugqibeleni zilahlekelwe amandla abo okukhangisa.Isizathu kukuba: emva kokuba inani elikhulu lamanzi lingena kwi-zeolite, amanzi aphendula kunye ne-zeolite, kwaye amanzi atshintsha ukusuka kwi-free state ukuya kumanzi e-crystal ye-zeolite.Nangona izinga lokushisa lokuhlaziya liyi-200 degrees, amanzi e-crystal akanakususwa, kwaye umsebenzi we-adsorption we-zeolite unokubuyiselwa kuphela emva kokuba ubuyiselwe kwisithando somlilo kwi-400 degrees ngumenzi!
Ngoko ke, xa i-molecular sieve ithatha amanzi kwindawo enkulu kwaye ichaphazeleka ngomswakama, umsebenzi uya kumiswa ngokukhawuleza kwaye ukuvuselelwa kuya kwenziwa.Ukuba i-adsorption ayinakubuyiselwa ngezi ndlela zimbini zingasentla, kuya kuqhagamshelwana nomvelisi ngokukhawuleza ukuze kuphinde kusebenze ukubala kwakhona.
4a Ukusebenza kwe-molecular sieve kunye nendlela yokuvuselela:
1. 4a Ukutshintsha kobushushu be-zeolite, oko kukuthi "ubushushu obuguquguqukayo"
I-adsorbate isuswa ngokufudumeza i-molecular sieve.Ngokubanzi, iisefu zemolekyuli ezisetyenziswa kwishishini zifudunyezwa kwangaphambili kwaye zifudunyezwe, zicocwe ukuya kutsho malunga ne-200 ℃, kwaye i-adsorbed adsorbate iyakhutshwa.
2. Guqula uxinzelelo olunxulumene ne-4a zeolite
Oko kukuthi, kwinkqubo ye-gas phase adsorption, indlela esisiseko kukugcina ubushushu be-adsorbent rhoqo, kunye nokususa i-adsorbate ngokudambisa kunye nokuvuthela ngasemva kwegesi ye-inert.
Kwinkqubo yokuhlaziywa kwe-4a ye-molecular sieve, kufuneka kuhlawulwe ingqalelo ekuphepheni inani elikhulu lokungena kwamanzi, ukusebenzisana phakathi kwamanzi kunye ne-molecular sieve, kunye nokuguqulwa kwamanzi kwi-free state ukuya kwi-crystalline state.Nokuba ubushushu bokuhlaziya bufikelela kuma-200 ℃, kunzima ukususa amanzi ayikristale.Ukuba ixesha lokutya lidlula imizuzu eyi-10, kwaye amabala amanzi acacileyo angabonwa emva kokuba i-gas yokuhlaziya ikhutshwe, inokugwetywa ukuba i-molecular sieve idinga ukubuyiselwa kwisithando somlilo ngaphandle kokuvuselelwa.
Ixesha lokuposa: Nov-23-2022