Noiʻi ʻana i ka laulā o ka hoʻohana ʻana o 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 kūlohelohe [1] a pēlā aku. Wahi a ka waikawa a me ka alkali, hiki ke hoʻokaʻawale ʻia ka desiccant i: ka desiccant waikawa, ka desiccant alkaline a me ka desiccant neutral [2]. ʻIke ʻia ʻo Silica gel he mea hoʻomaloʻo neutral e hoʻomaloʻo ana iā NH3, HCl, SO2, a pēlā aku. Eia naʻe, mai ka manaʻo nui, ua haku ʻia ka silica gel i ka dehydration intermolecular ʻekolu-dimensional o nā molekala waikawa orthosilicic, 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 omo i ka wai, ʻo ia ka hui silicon hydroxyl ma ka ʻili o ka silica gel hiki ke hana i nā pilina hydrogen intermolecular me nā molekala wai, no laila hiki iā ia ke adsorb i ka wai a pēlā e pāʻani ai i kahi hana maloʻo. Aia i loko o ka silica gel hoʻololi kala nā ions cobalt, a ma hope o ka hiki ʻana o ka wai adsorption i ka saturation, lilo nā ions cobalt i loko o ka silica gel hoʻololi kala i mau ions cobalt hydrated, i lilo ai ka silica gel polū i poni. Ma hope o ka hoʻomehana ʻana i ka silica gel poni ma 200 ℃ no kekahi manawa, ua haki ka pilina hydrogen ma waena o ka silica gel a me nā mole wai, a e lilo hou ka silica gel i polū, i hiki ke hoʻohana hou ʻia ke kiʻikuhi hoʻonohonoho o ka silicic acid a me ka silica gel e like me ka mea i hōʻike ʻia ma ke Kiʻi 1. No laila, ʻoiai ua waiwai ka ʻili o ka silica gel i nā hui hydroxyl, hiki i ka ʻili o ka silica gel ke hana i nā pilina hydrogen intermolecular me NH3 a me HCl, a pēlā aku, 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 ka noiʻi hoʻokolohua ma lalo nei.