E noiʻi e pili ana i ke ʻano o ka hoʻohana ʻana i ka silica gel desiccant

I ka hana ʻana a me ke ola, hiki ke hoʻohana ʻia ka silica gel e hoʻomaloʻo i ka N2, ka ea, ka hydrogen, ke kinoea maoli [1] a pēlā aku. Wahi a ka waikawa a me ka alkali, hiki ke hoʻokaʻawale ʻia ka desiccant i: acid desiccant, alkaline desiccant a me neutral desiccant [2]. ʻIke ʻia ka silica gel he mea maloʻo kūʻokoʻa e like me ka maloʻo NH3, HCl, SO2, a me nā mea ʻē aʻe. Eia naʻe, mai ka manaʻo kumu, ua haku ʻia ka silica gel i ʻekolu-dimensional intermolecular dehydration o orthosilicic acid molecules, ʻo ke kino nui ʻo SiO2, a ua waiwai ka ʻili i nā hui hydroxyl (e nānā i ke kiʻi 1). ʻO ke kumu e hiki ai i ka silica gel ke komo i ka wai, ʻo ia ka hui hydroxyl silicon ma ka ʻili o ka silica gel hiki ke hana i nā paʻa hydrogen intermolecular me nā molekole wai, no laila hiki iā ia ke adsorb i ka wai a pēlā e pāʻani ai i kahi hana maloʻo. Loaʻa i ka silica gel hoʻololi kala i nā ion cobalt, a ma hope o ka hiki ʻana o ka wai adsorption i ka saturation, lilo nā ion cobalt i loko o ka silica gel hoʻololi kala i nā ion cobalt hydrated, i lilo ka polū silica gel i poni. Ma hope o ka hoʻomehana ʻana i ka gel silica ʻulaʻula ma 200 ℃ no kekahi manawa, ua haki ka paʻa hydrogen ma waena o ka silica gel a me nā molekole wai, a e huli hou ka silica gel i ʻulaʻula, i hiki ke hoʻohana hou ʻia ke kiʻikuhi o ka silicic acid a me ka silica gel e like me ka hōʻike ʻana ma ke Kiʻi 1. HCl, etc., a ʻaʻohe ala e hana ai ma ke ʻano he desiccant o NH3 a me HCl, a ʻaʻohe hōʻike pili i nā palapala e kū nei. No laila he aha nā hopena? Ua hana kēia kumuhana i kēia noiʻi hoʻokolohua.