Ekukhiqizeni nasekuphileni, ijeli ye-silica ingasetshenziswa ukomisa i-N2, umoya, i-hydrogen, igesi yemvelo [1] njalo njalo. Ngokusho kwe-asidi ne-alkali, i-desiccant ingahlukaniswa ibe yi: i-acid desiccant, i-alkaline desiccant kanye ne-neutral desiccant [2]. Ijeli ye-silica ibonakala iyisomisi esingathathi hlangothi esibonakala somisa i-NH3, i-HCl, i-SO2, njll. Kodwa-ke, ngokombono oyinhloko, ijeli ye-silica yakhiwe ngamanzi angaphakathi kwama-molecule e-orthosilicic acid, umzimba oyinhloko yi-SiO2, kanti ubuso bucebile ngamaqembu e-hydroxyl (bheka Umfanekiso 1). Isizathu sokuthi ijeli ye-silica ingamunca amanzi ukuthi iqembu le-silicon hydroxyl ebusweni bejeli ye-silica lingakha izibopho ze-hydrogen eziphakathi kwama-molecule nama-molecule amanzi, ngakho-ke lingamunca amanzi futhi ngaleyo ndlela lidlale indima yokomisa. Ijeli ye-silica eshintsha umbala iqukethe ama-ion e-cobalt, futhi ngemva kokuba amanzi okumunca efinyelele ekugcwaleni, ama-ion e-cobalt kujeli ye-silica eshintsha umbala aba ama-ion e-cobalt athambile, ukuze ijeli ye-silica eluhlaza okwesibhakabhaka ibe pinki. Ngemva kokushisa ijeli ye-silica epinki ku-200℃ isikhathi esithile, isibopho se-hydrogen phakathi kwejeli ye-silica nama-molecule amanzi siyaphuka, bese ijeli ye-silica eshintshile umbala izophenduka ibe luhlaza okwesibhakabhaka futhi, ukuze umdwebo wesakhiwo se-silicic acid kanye nejeli ye-silica ingasetshenziswa kabusha njengoba kuboniswe kuMfanekiso 1. Ngakho-ke, njengoba ubuso bejeli ye-silica bucebile ngamaqembu e-hydroxyl, ubuso bejeli ye-silica bungakha futhi izibopho ze-hydrogen eziphakathi kwama-molecule ne-NH3 kanye ne-HCl, njll., futhi kungase kungabikho ndlela yokusebenza njenge-desiccant ye-NH3 kanye ne-HCl, futhi akukho mbiko ofanele ezincwadini ezikhona. Ngakho-ke kwaba yini imiphumela? Lesi sihloko senze ucwaningo olulandelayo lokuhlola.
Isikhathi sokuthunyelwe: Novemba-14-2023
