Dab tsi yog qhov txawv ntawm 3a, 4a thiab 5a molecular sieves?Puas yog 3 hom molecular sieves siv rau tib lub hom phiaj?Dab tsi yog yam muaj feem cuam tshuam rau txoj haujlwm ua haujlwm?Yam kev lag luam twg tsim nyog rau?Tuaj thiab paub nrog JXKELLEY.
1. Cov tshuaj formula ntawm 3a 4a 5a molecular sieve
3A molecular sieve tshuaj formula: 2/3K₂O1₃·Na₂₂O·Al₂O₃·2 TSI₂.·4.5 H ua₂O
4A molecular sieve tshuaj formula: Na₂O·Al₂O₃·2 TSI₂·4.5 H ua₂O
5A molecular sieve tshuaj formula: 3/4CaO1/4Na₂OAl₂O₃·2 TSI₂·4.5 H ua₂O
2. Qhov pore loj ntawm 3a 4a 5a molecular sieve
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm molecular sieves yog feem ntau cuam tshuam nrog qhov pore loj ntawm molecular sieves, uas yog 0.3nm / 0.4nm / 0.5nm feem.Lawv tuaj yeem nqus cov pa roj molecules uas nws txoj kab uas hla molecular me dua qhov pore loj.Qhov loj ntawm qhov loj ntawm qhov pore loj, qhov muaj peev xwm adsorption ntau dua.Qhov pore loj txawv, thiab cov khoom uas tau lim thiab sib cais kuj txawv.Hauv cov ntsiab lus yooj yim, 3a molecular sieve tuaj yeem tsuas yog adsorb molecules hauv qab 0.3nm, 4a molecular sieve, cov adsorbed molecules yuav tsum tsawg dua 0.4nm, thiab 5a molecular sieve yog tib yam.Thaum siv los ua desiccant, molecular sieve tuaj yeem nqus tau li 22% ntawm nws tus kheej qhov hnyav hauv cov dej noo.
3. 3a 4a 5a molecular sieve thov kev lag luam
3A molecular sieve tsuas yog siv rau ziab roj av tawg, olefin, refinery gas thiab oilfield gas, nrog rau desiccant hauv tshuaj, tshuaj, insulating iav thiab lwm yam lag luam.Feem ntau yog siv rau ziab cov kua (xws li ethanol), cua ziab ntawm cov iav insulating, nitrogen thiab hydrogen sib xyaw roj kom qhuav, refrigerant kom qhuav, thiab lwm yam.
4A molecular sieves tsuas yog siv rau ziab cov pa roj thiab ntau yam tshuaj lom neeg thiab cov kua dej, cov tub yees, tshuaj, cov ntaub ntawv hluav taws xob thiab cov khoom tsis haum, purifying argon, thiab cais cov methane, ethane thiab propane.Feem ntau yog siv rau kev ziab kom qhuav ntawm cov pa roj thiab cov kua dej xws li cua, nkev roj, hydrocarbons, tub yees;npaj thiab purification ntawm argon;static drying ntawm cov khoom siv hluav taws xob thiab cov khoom puas tsuaj;dehydrating tus neeg sawv cev hauv cov xim, polyesters, dyes thiab coatings.
5A molecular sieve feem ntau yog siv rau kev ziab roj, desulfurization thiab tshem tawm carbon dioxide;kev sib cais ntawm nitrogen thiab oxygen los npaj cov pa oxygen, nitrogen thiab hydrogen;Petroleum dewaxing cais cov hydrocarbons ib txwm los ntawm branched hydrocarbons thiab cyclic hydrocarbons.
Txawm li cas los xij, qhov loj tshwj xeeb ntawm thaj chaw thiab cov polar adsorption ntawm 5A molecular sieves tuaj yeem ua tiav qhov sib sib zog nqus adsorption ntawm dej thiab cov ammonia residual.Lub decomposed nitrogen-hydrogen sib tov nkag mus rau hauv lub tshuab ziab khaub ncaws kom tshem tawm cov seem seem thiab lwm yam impurities.Cov cuab yeej ua kom huv tau txais ob chav adsorption yees, ib qho absorbs qhuav ammonia decomposition gas, thiab lwm yam desorbs noo noo thiab residual ammonia nyob rau hauv ib tug rhuab xeev (feem ntau 300-350 ℃) kom ua tiav lub hom phiaj ntawm regeneration.Tam sim no, koj puas tuaj yeem tau txais qhov sib txawv ntawm 3a 4a 5a molecular sieves?
Post lub sij hawm: Aug-09-2022