Kwimveliso kunye nobomi, ijeli ye-silica ingasetyenziselwa ukomisa i-N2, umoya, i-hydrogen, igesi yendalo [1] njalo njalo. Ngokwe-asidi kunye ne-alkali, i-desiccant ingahlulwahlulwa ibe: i-acid desiccant, i-alkaline desiccant kunye ne-neutral desiccant [2]. Ijeli ye-silica ibonakala ngathi yi-neutral dryer ebonakala ngathi yomisa i-NH3, i-HCl, i-SO2, njl. Nangona kunjalo, ngokwembono ephambili, ijeli ye-silica yenziwe yi-three-dimensional intermolecular dehydration ye-orthosilicic acid molecules, umzimba oyintloko yi-SiO2, kwaye umphezulu utyebile ngamaqela e-hydroxyl (jonga uMfanekiso 1). Isizathu sokuba ijeli ye-silica inokufunxa amanzi kukuba iqela le-silicon hydroxyl kumphezulu wejeli ye-silica linokwenza iibhondi ze-hydrogen eziphakathi kwe-molecular kunye nee-molecule zamanzi, ngoko ke inokufunxa amanzi kwaye ngaloo ndlela idlale indima yokomisa. Ijeli ye-silica etshintsha umbala inee-ion ze-cobalt, kwaye emva kokuba amanzi e-adsorption efikelele ekugcwaleni, ii-ion ze-cobalt kwijeli ye-silica etshintsha umbala ziba yi-ion ze-cobalt ezimanzi, ukuze ijeli ye-silica eluhlaza ibe pinki. Emva kokufudumeza ijeli ye-silica epinki kwi-200℃ kangangexesha elithile, i-hydrogen bond phakathi kwejeli ye-silica kunye neemolekyuli zamanzi iyaqhekeka, kwaye ijeli ye-silica eguqulwe umbala iya kuba luhlaza okwesibhakabhaka kwakhona, ukuze umzobo wesakhiwo se-silicic acid kunye nejeli ye-silica ingasetyenziswa kwakhona njengoko kubonisiwe kuMfanekiso 1. Ngoko ke, ekubeni umphezulu wejeli ye-silica utyebile kumaqela e-hydroxyl, umphezulu wejeli ye-silica unokwenza iibhondi ze-hydrogen eziphakathi kweemolekyuli kunye ne-NH3 kunye ne-HCl, njl.njl., kwaye kusenokungabikho ndlela yokusebenza njenge-desiccant ye-NH3 kunye ne-HCl, kwaye akukho ngxelo ifanelekileyo kwiincwadi ezikhoyo. Ngoko ke zithini iziphumo? Esi sifundo senze uphando olulandelayo lovavanyo.
Ixesha lokuthumela: Novemba-14-2023
