Kafukufuku wokhudza momwe silika gel desiccant imagwiritsidwira ntchito

Pakupanga ndi moyo, silica gel ingagwiritsidwe ntchito kuumitsa N2, mpweya, haidrojeni, gasi lachilengedwe [1] ndi zina zotero. Malinga ndi asidi ndi alkali, desiccant ingagawidwe m'magulu awa: acid desiccant, alkaline desiccant ndi neutral desiccant [2]. Silica gel ikuwoneka ngati chowumitsira chosalowerera chomwe chimawoneka kuti chikuumitsa NH3, HCl, SO2, ndi zina zotero. Komabe, kuchokera ku mfundo yaikulu, silica gel imapangidwa ndi kusowa madzi m'mamolekyulu a orthosilicic acid, thupi lalikulu ndi SiO2, ndipo pamwamba pake pali magulu ambiri a hydroxyl (onani Chithunzi 1). Chifukwa chomwe silica gel imatha kuyamwa madzi ndikuti gulu la silicon hydroxyl pamwamba pa silica gel limatha kupanga ma hydrogen bond apakati pa molekyulu ndi mamolekyulu amadzi, kotero imatha kuyamwa madzi motero imagwira ntchito yowuma. Silica gel yosintha mtundu imakhala ndi ma cobalt ion, ndipo madzi atatha kuyamwa atafika pakukwanira, ma cobalt ion mu silica gel yosintha mtundu amakhala ma cobalt ion, kotero kuti blue silica gel imakhala pinki. Pambuyo potenthetsa silika gel ya pinki pa 200℃ kwa kanthawi, mgwirizano wa hydrogen pakati pa silika gel ndi mamolekyu amadzi umasweka, ndipo silika gel yosinthika idzakhala yabuluu kachiwiri, kotero kuti chithunzi cha kapangidwe ka silicic acid ndi silika gel zitha kugwiritsidwanso ntchito monga momwe zasonyezedwera pa Chithunzi 1. Chifukwa chake, popeza pamwamba pa silika gel pali magulu ambiri a hydroxyl, pamwamba pa silika gel pakhoza kupanganso ma hydrogen bond apakati ndi NH3 ndi HCl, ndi zina zotero, ndipo sipangakhale njira yogwirira ntchito ngati desiccant ya NH3 ndi HCl, ndipo palibe lipoti lofunikira m'mabuku omwe alipo. Ndiye zotsatira zake zinali zotani? Mutuwu wachita kafukufuku wotsatira.