molecular sieve is a porous material ine maburi madiki, mauniform-size. Inoshanda sesefa yekicheni, kunze kwechiyero che molecular, kupatsanura gasi musanganiswa une mamorekuru akawanda. Chete mamorekuru madiki pane pores anogona kupfuura; nepo, mamorekuru makuru akavharika. Kana mamorekuru aunoda kupatsanura akaenzana saizi, sefa ye molecular inogonawo kuparadzaniswa ne polarity. Sieves anoshandiswa mumhando dzakasiyana-siyana semanyoro anobvisa desiccants uye anobatsira kudzivirira kuparara kwezvigadzirwa.
Mhando dzeMolecular Sieves
Masefa mamorekuru anouya mumhando dzakasiyana se3A, 4A, 5A uye 13X. Nhamba dzenhamba dzinotsanangura ukuru hwepore uye makemikari emusero. Ioni dze potassium, sodium, uye calcium inoshandurwa mukugadzirwa kudzora ukuru hwepore. Kune nhamba dzakasiyana dzemeshes mumasefa akasiyana. A molecular sieve ine nhamba diki yemameshes inoshandiswa kuparadzanisa magasi, uye imwe ine meshes yakawanda inoshandiswa kune zvinwiwa. Mamwe maparamita akakosha emasefa emamorekuru anosanganisira fomu (hupfu kana bead), kuwanda kwehuwandu, pH mazinga, tembiricha yekuvandudza (activation), hunyoro, nezvimwe.
Molecular Sieve vs. Silica Gel
Silica gel inogonawo kushandiswa sehunyoro inobvisa desiccant asi yakasiyana zvikuru kubva kune molecular sieve. Zvinhu zvakasiyana-siyana zvinogona kutariswa paunenge uchisarudza pakati pezviviri izvi sarudzo dzegungano, shanduko mukumanikidza, mwando mwero, masimba emagetsi, tembiricha yemhando, nezvimwe.
Muyero wekushambadza kwe molecular sieve yakakura kupfuura iyo silica gel. Izvi zvinodaro nekuti sefa ibasa rekuomesa nekukasira.
A molecular sieve inoshanda zvirinani pane silica gel mukupisa kwakanyanya, sezvo iine chimiro chakafanana chinosunga mvura zvakasimba.
Pakadzika Relative Humidity, kugona kwe molecular sieve kuri nani kupfuura iyo silica gel.
Chimiro che molecular sieve inotsanangurwa uye ine yunifomu pores, nepo chimiro chesilica gel chiri amorphous uye akawanda asina kukwana pores.
Maitiro Okuita MaMolecular Sieves
Kuti uvhure masefa emamolekyuli, chinodiwa kuratidzwa kune tembiricha yepamusoro-soro, uye kupisa kunofanirwa kunge kwakakwira zvakakwana kuti adsorbate inyunguduke. Tembiricha yaizosiyana nemidziyo iri kushambadzwa uye rudzi rwe adsorbent. Tembiricha yenguva dzose ye170-315oC (338-600oF) ingadiwa pamhando dzemasefa dzambotaurwa. Zvese zviri zviviri zvinhu zviri adsorbed, uye iyo adsorbent inodzikiswa pane iyi tembiricha. Vacuum kuomesa inzira inokurumidza kuita izvi uye inoda tembiricha yakadzikira kana ichienzaniswa nekuomesa murazvo.
Kana yangoitwa, masefa anogona kuchengetwa mugaba regirazi rine parafilm yakaputirwa kaviri. Izvi zvichaita kuti dzirambe dzichishanda kwemwedzi inosvika mitanhatu. Kuti uone kana masefa ari kushanda, unogona kuabata muruoko rwako wakapfeka magirovhosi uye wowedzera mvura kwavari. Kana vakanyatsoshanda, saka tembiricha inokwira zvakanyanya, uye haugone kuvabata kunyangwe uchipfeka magirovhosi.
Kushandiswa kwemidziyo yekuchengetedza senge PPE kits, magurovhosi, uye magirazi ekuchengetedza kunokurudzirwa sezvo maitiro ekuita activation yemamolecular sieves anosanganisira kubata nekupisa kwakanyanya uye makemikari, uye njodzi dzakabatana.
Nguva yekutumira: May-30-2023
