Inqubo yokuhlola enemininingwane ye-Boehmite

I-Boehmite, i-aluminium ebalulekile{{0}esekelwe kumaminerali, isetshenziswa kakhulu kuzisekelo ze-catalyst, ama-lithium separator coatings, nezitsha zobumba. Ukuqinisekisa ukuhlanzeka kwayo, ukwakheka kwekristalu, kanye nezakhiwo ezibonakalayo kuhlangabezana nezindinganiso zomkhakha, inqubo yokuhlola ehlelekile iyadingeka ukuze kulawulwe ikhwalithi. Okulandelayo yizinyathelo eziyinhloko kanye namaphuzu obuchwepheshe okuhlolwa kwe-boehmite.

I. Isampula Lokwelapha

Amasampula e-Boehmite kufanele enziwe ngaphambi kokuhlolwa ukuze kuqinisekiswe imiphumela enembile yokuhlaziya. Okokuqala, gaya isampula eluhlaza ku-fineness ye-200 mesh noma okungcono usebenzisa i-grinder bese uyomisa kuhhavini ku-105℃-110℃amahora angu-2 ukuze ususe umswakama owenziwe. Uma ukuhlolwa kuhilela amaqembu asebenzayo angaphezulu noma ukungcola kwemvelo, ukuhlanzwa okwengeziwe nge-anhydrous ethanol nokomiswa kwevacuum kuyadingeka ukuze kuvinjelwe isincibilikisi esisalela ekuphazamiseni ukuhlaziywa okulandelayo.

II. Ukuhlolwa Kwempahla Engokoqobo
1.I-Particle Size Distribution: I-laser particle size analyzer (njenge-Malvern Mastersizer) isetshenziselwa ukukala ububanzi bezinhlayiyana zezinhlayiya ze-boehmite. I-D50 (ububanzi obumaphakathi) ngokuvamile ilawulwa phakathi kuka-0.5 no-5 μm ukuze ihlangabezane nezimfuneko zezimo zohlelo lokusebenza ezihlukene.

2.Indawo Ekhethekile Yokuphezulu: Indawo ethile ilinganiswa kusetshenziswa indlela ye-BET nitrogen adsorption (njenge-Micromeritics ASAP 2020). I-boehmite -yokuhlanzeka okuphezulu ngokuvamile inendawo ethile engu-5 ukuya ku-20 m²/g, ethinta ngokuqondile umsebenzi we-catalytic kanye nokufana kwe-coating.

3.I-Crystal Morphology: Ukuskena i-electron microscopy (SEM) isetshenziselwa ukubuka i-particle morphology. I-Boehmite ngokuvamile ibonisa i-flake{2}}like noma isakhiwo esine-fibrous. I-morphological consistency iyinkomba eyinhloko yezinhlelo zokusebenza-eziphezulu.

III. Ukuhlaziywa Kwamakhemikhali Nobumsulwa
1.Ukwakheka Kwekhemikhali: Ukuhlaziywa komthamo kokuqukethwe kwe-Al₂O₃ kwenziwa kusetshenziswa i-X-ray fluorescence spectroscopy (XRF) noma i-plasma optical emission spectroscopy (ICP-OES) ehlanganiswe nge-inductively. I-Industrial-yezinga le-boehmite idinga ukuhlanzeka kwe-Al₂O₃ kokuKhulu noma okulingana no-95%, kuyilapho i-boehmite ephezulu{6}}yokuhlanzeka idinga ukuhlanzeka Kokukhulu noma okulingana no-99%.

2.Ukutholwa Kokungcola: I-ICP-MS noma i-atomic absorption spectroscopy (AAS) isetshenziselwa ukunquma umkhondo wokungcola okufana ne-SiO₂, Fe₂O₃, ne-Na₂O. Okuqukethwe kwabo kufanele kukhawulwe ngokuqinile ukuze kugwenywe ukuthikameza izakhiwo zezinto ezibonakalayo.

IV. I-Crystal Structure Characterization
I-1.X-ray Diffraction (XRD): Iziqongo ze-Bragg diffraction zisetshenziselwa ukuqinisekisa -ifomu lekristalu le-AlOOH le-boehmite nokubala izinga lecrystallinity. I-boehmite evamile ibonisa iziqongo zezici ze-diffraction ebangeni elingu-2θ le-14℃kuya ku-35 degree. Ukuba khona kokungcola (okufana nokuthi -Al₂O₃) kungase kubonise ngaphezulu-ukubala.

I-2.Thermogravimetric Analysis (TGA): Ukushisa ku-1000℃emoyeni womoya kanye nokuqapha ijika lokulahlekelwa isisindo. I-Boehmite ivamise ukubola ibe yi--Al₂O₃ phakathi kuka-300℃no-500℃. Izinga lokulahlekelwa isisindo lingasetshenziswa ukuze kuqinisekiswe okuqukethwe kwe-hydroxyl.

V. Ukuhlola Okusebenzayo (Ongakukhetha)

Ezisetshenziswa ezithile, ukukala i-pH (ngokuvamile i-7-9), ukuhlola ukumuncwa kukawoyela (ukuhlola ukuhlakazeka), noma ukuhlaziywa kwe-porosity (okufana ne-mercury intrusion porosimetry) nakho kungase kudingeke ukuze kuhlangatshezwane nezidingo ezithile zezisekelo ze-catalyst noma izinto zebhethri.

Kafushane, inqubo yokuhlola i-boehmite idinga-ukuhlaziywa kobukhulu obuningi okuhlanganisa ukuhlaziya ngokomzimba, amakhemikhali, kanye nekristalu ukuze kuqinisekiswe ukusebenza okuzinzile nokuthembekile futhi kunikeze isiqiniseko sekhwalithi yezinhlelo zokusebenza ezingaphansi komfula.