Masifa emolecularzvinhu zvakakosha zvegasi uye kuparadzaniswa kwemvura uye kucheneswa mumaindasitiri akasiyana. Iwo macrystalline metalloaluminosilicates ane maunifomu pores ayo anosarudza adsorb mamorekuru zvichienderana nehukuru uye chimiro. Thekugadzirwa kwema molecular sievesinosanganisira akati wandei matanho akaomarara ekuona kugadzirwa kwezvinhu zvemhando yepamusoro zvine saizi chaiyo yepore uye zvivakwa.
Kugadzirwa kwema molecular sieves kunotanga nekusarudzwa kwezvinhu zvakabikwa, zvinosanganisira sodium silicate, alumina uye mvura. Zvinhu izvi zvinosanganiswa muchiyero chakanyatso kuumba gel homogeneous, iyo inobva yaiswa pasi pe hydrothermal synthesis process. Muchinhanho ichi, gel rinopisa kune tembiricha yakakwirira pamberi pezve alkaline zvinhu kusimudzira kuumbwa kwekristaro chimiro chine yunifomu pores.
Iyo inotevera nhanho yakakosha mukugadzirwa kweiyo ion exchange, iyo inosanganisira kutsiva sodium ion muchimiro chekristaro nemamwe ma cations akadai se calcium, potassium kana magnesium. Iyi ion yekuchinjana maitiro yakakosha pakugadzirisa mashandiro emamolecular sieves, kusanganisira adsorption kugona uye kusarudza. Mhando ye cation inoshandiswa pakuchinjanisa ion zvinoenderana nezvinodiwa zvekushandisa zve molecular sieve.
Mushure mekuchinjana ion, masefa emamolekyuli anoteedzana nekugezesa nekuomesa matanho ekubvisa chero tsvina uye makemikari asara kubva mukugadzira. Izvi zvinova nechokwadi chekuti chigadzirwa chekupedzisira chinosangana nemiyero yakaomesesa yekuchena inodiwa kumaindasitiri ekushandisa. Mushure mekugeza uye kuomeswa kwapera, ma molecular sieves anoverengerwa pakupisa kwakanyanya kuti agadzikane chimiro chekristaro uye kubvisa chero yakasara organic compounds.
Nhanho yekupedzisira mukuita kwekugadzira inosanganisira activation yemamorekuru sieve kuti vagadzirire adsorption application. Iyi activation process inowanzo sanganisira kudziyisa iyomolecular sievepakupisa kwepamusoro kubvisa unyoro uye kuwedzera adsorption yayo. Iyo nguva uye tembiricha yeiyo activation process inodzorwa nekuchenjera kuti iwane yaidiwa pore saizi uye pamusoro penzvimbo ye molecular sieve.
Masieve mamorekuru anowanikwa muhukuru hwakasiyana hwepore, kusanganisira 3A, 4A uye 5A, imwe neimwe yakakodzera kune chaiwo maapplication. Semuyenzaniso,3A molecular sefaanowanzo kushandiswa kupera mvura mumuviri magasi uye zvinwiwa, nepo4A uye 5A masefa emolecularinosarudzwa pakushambadza mamorekuru akakura uye kubvisa tsvina yakaita semvura necarbon dioxide.
Muchidimbu, kugadzirwa kwema molecular sieves inzira yakaoma uye yakaoma inosanganisira akati wandei matanho akakosha, anosanganisira hydrothermal synthesis, ion exchange, kuwacha, kuomesa, calcination, uye activation. Aya matanho anonyatsodzorwa kuti abudisemolecular sievesine zvivakwa zvakajairwa uye saizi yepore kuti isangane nezvinodiwa zvakasiyana-siyana zvemaindasitiri senge petrochemical, mishonga uye gasi kugadzirisa. Yepamusoro-soroma molecular sieves anogadzirwanevagadziri vane mukurumbira vanoita basa rakakosha mukuwana kupatsanurwa kwakanaka uye nzira dzekuchenesa mumaindasitiri akasiyana siyana.
Nguva yekutumira: Kubvumbi-19-2024