Umahluko we-3a 4a 5a i-molecular sieve

Uthini umahluko phakathi kwe-3a, 4a kunye ne-5a ye-molecular sieves? Ngaba ezi ntlobo zi-3 zeesefu zemolekyuli zisetyenziselwa injongo enye? Ziziphi izinto ezinxulumene nomgaqo wokusebenza? Ngawaphi amashishini afaneleke ngakumbi? Yiza ufumanise nge-JXKELLEY.

1. I-chemical formula ye-3a 4a 5a i-molecular sieve

3I-molecular sieve chemical formula: 2/3K₂O1₃·Na₂₂O·Al₂O₃·2SiO₂.·4.5H₂O

4Ifomula yekhemikhali yesihluzo semolekyuli: Na₂O·Al₂O₃·2SiO₂·4.5H₂O

5I-molecular sieve chemical formula: 3/4CaO1/4Na₂OAl₂O₃·2SiO₂·4.5H₂O

2. Ubungakanani bepore ye-3a 4a 5a i-molecular sieve

Umgaqo osebenzayo we-molecular sieves unxulumene ikakhulu nobukhulu bepore yeesefu ze-molecular, eziyi-0.3nm/0.4nm/0.5nm ngokulandelelanayo. Ziyakwazi ukubhengeza iimolekyuli zerhasi ezinobubanzi bemolekyuli buncinci kunobukhulu bepore. Ubukhulu besayizi yepore, ubukhulu be-adsorption umthamo. Ubungakanani bepore bahlukile, kwaye izinto ezihluzwayo kwaye zahluliwe nazo zahlukile.Ngamagama alula, i-3a ye-molecular sieve inokubhengeza kuphela iimolekyuli ezingaphantsi kwe-0.3nm, i-4a ye-molecular sieve, ii-molecule ze-adsorbed kufuneka zibe ngaphantsi kwe-0.4nm, kunye ne-5a ye-molecular sieve iyafana.Xa isetyenziswe njenge-desiccant, i-molecular sieve inokuthatha ukuya kwi-22% yobunzima bayo kumswakama.

3. 3a 4a 5a ishishini lokusefa imolekyuli

I-3I-molecular sieve isetyenziselwa ukomisa i-petroleum cracking gas, i-olefin, i-refinery gas kunye ne-oilfield gas, kunye ne-desiccant kwiikhemikhali, i-pharmaceutical, insulating glass kunye namanye amashishini. Ikakhulu isetyenziselwa ukomisa ulwelo (olufana ne-ethanol), ukomiswa komoya kweglasi ekhuselayo, initrogen kunye ne-hydrogen exutywe negesi yokumisa, ukomiswa kwefriji, njl.

I-4A i-molecular sieves isetyenziselwa ukomisa igesi yendalo kunye neegesi ezahlukeneyo zeekhemikhali kunye nolwelo, iifriji, amayeza, idatha ye-elektroniki kunye nezinto eziguquguqukayo, i-argon yokucoca, kunye nokwahlula i-methane, i-ethane kunye ne-propane. Ikakhulu isetyenziselwa ukomiswa nzulu kweegesi kunye nolwelo olunjengomoya, igesi yendalo, iihydrocarbons, iifriji; ukulungiswa kunye nokuhlanjululwa kwe-argon; ukomiswa kwe-static kwamacandelo e-elektroniki kunye nezixhobo ezinokonakala; i-agent yokuphelisa amanzi kwiipeyinti, iipolyester, iidayi kunye neengubo.

I-5I-molecular sieve isetyenziselwa ukomisa igesi yendalo, i-desulfurization kunye nokususwa kwe-carbon dioxide; ukwahlukana kwenitrogen kunye neoksijini ukulungiselela ioksijini, initrogen kunye nehydrogen; i-petroleum dewaxing ukwahlula ii-hydrocarbons eziqhelekileyo kwi-branched hydrocarbons kunye ne-cyclic hydrocarbons.

Nangona kunjalo, indawo enkulu yendawo ethile kunye ne-polar adsorption ye-5A ye-molecular sieves inokufikelela kwi-adsorption enzulu yamanzi kunye ne-ammonia eseleyo. Umxube wenitrogen-hydrogen obolileyo ungena kwindawo yokomisa ukususa ukufuma okushiyekileyo kunye nobunye ukungcola. Isixhobo sokucoca samkela iinqaba eziphindwe kabini ze-adsorption, enye ifunxa igesi eyomileyo yokubola kwe-ammonia, kwaye enye i-desorb ukufuma kunye ne-ammonia eseleyo kwindawo eshushu (ngokubanzi i-300-350 ℃) ukufezekisa injongo yokuvuselela.Ngoku, ungawufumana umahluko phakathi kwe-3a 4a 5a iisefu zemolekyuli?