Uphando malunga nomda wokusetyenziswa kwe-silica gel desiccant

Kwimveliso kunye nobomi, i-silica gel ingasetyenziselwa ukomisa i-N2, umoya, i-hydrogen, igesi yendalo [1] njalo njalo. Ngokutsho kwe-asidi kunye ne-alkali, i-desiccant inokwahlulwa ibe yi-acid desiccant, i-alkaline desiccant kunye ne-desiccant engathathi hlangothi [2]. Ijeli ye-silica ibonakala iyinto eyomileyo engathathi hlangothi ebonakala yomile i-NH3, i-HCl, i-SO2, njl njl. Nangona kunjalo, ngokwembono yomgaqo-siseko, i-silica gel yenziwe nge-dimensional intermolecular dehydration ye-orthosilicic acid molecules, umzimba oyintloko yi-SiO2, kwaye umphezulu ucebile kumaqela e-hydroxyl (jonga umfanekiso 1). Isizathu sokuba ijeli ye-silica ikwazi ukufunxa amanzi kukuba iqela le-silicon hydroxyl kumphezulu we-silica gel linokwenza i-intermolecular hydrogen bonds kunye neemolekyuli zamanzi, ngoko ke inokubhengeza amanzi kwaye ngaloo ndlela idlale indima yokomisa. Ijeli ye-silica eguqula umbala iqulethe i-cobalt ion, kwaye emva kokuba amanzi e-adsorption afikelele kwi-saturation, i-cobalt ion kwi-silica gel eguqula umbala ibe yi-hydrated cobalt ion, ukuze i-gel silica eluhlaza ibe yipinki. Emva kokufudumeza ijeli ye-silica epinki kwi-200 ℃ ixesha elithile, ibhondi ye-hydrogen phakathi kwejeli ye-silica kunye neemolekyuli zamanzi ziyaphuka, kwaye ijeli ye-silica e-discolored iya kubuya ibe luhlaza okwesibhakabhaka kwakhona, ukuze umzobo wesakhiwo se-silicic acid kunye nejeli ye-silica ingaphinda isetyenziswe njengoko kuboniswe kuMfanekiso 1. i-intermolecular hydrogen bonds kunye ne-NH3 kunye ne-HCl, njl., kwaye kungabikho ndlela yokwenza njenge-desiccant ye-NH3 kunye ne-HCl, kwaye akukho ngxelo efanelekileyo kwiincwadi ezikhoyo. Yaba yintoni ke imiphumo? Lo mbandela wenze olu phando lulandelayo lovavanyo.