ʻO ka kānana molekala he mea porous nona nā puka liʻiliʻi loa. Hana ʻia e like me ka kānana kīhini, koe wale nō ma ka unahi mole, e hoʻokaʻawale ana i nā hui kinoea i loaʻa nā molekole lehulehu. ʻO nā molekala liʻiliʻi wale nō ma mua o nā pores hiki ke hele i loko; akā, ua ālai ʻia nā molekala nui. Inā like ka nui o nā molekala āu e makemake ai e hoʻokaʻawale, hiki ke hoʻokaʻawale ʻia kahi kānana molekala ma ka polarity. Hoʻohana ʻia nā kānana i nā ʻano noi like ʻole e hoʻoneʻe i nā desiccants a kōkua i ka pale ʻana i ka hōʻino ʻana o nā huahana.
Nā ʻano kānana Molekule
Hele mai nā kānana molekala i nā ʻano like ʻole e like me 3A, 4A, 5A a me 13X. Hōʻike nā helu helu i ka nui o ka pore a me ka hoʻohui kemika o ka sieve. Hoʻololi ʻia nā ion o ka potassium, sodium, a me ka calcium i ka haku mele e hoʻomalu i ka nui o ka pore. Aia nā helu ʻokoʻa o nā meshes ma nā kānana like ʻole. Hoʻohana ʻia kahi kānana molekala me kahi helu liʻiliʻi o nā meshes e hoʻokaʻawale i nā kinoea, a hoʻohana ʻia kekahi me nā meshes hou aku no nā wai. ʻO nā ʻāpana koʻikoʻi ʻē aʻe o nā kānana molekala e pili ana i ke ʻano (pauka a i ʻole ka bead), ka nui o ka nui, nā pae pH, nā mahana hoʻolaʻa hou (hoʻoulu), ka wai, a pēlā aku.
Molecular Sieve vs. Silica Gel
Hiki ke hoʻohana ʻia ka silica gel ma ke ʻano he mea hoʻomaʻemaʻe e hoʻoneʻe ai i ka wai akā he ʻokoʻa loa ia mai kahi kānana molekala. ʻO nā kumu like ʻole i hiki ke noʻonoʻo ʻia i ke koho ʻana ma waena o nā mea ʻelua, ʻo ia nā koho hui, nā hoʻololi i ke kaomi, nā pae wai, nā ikaika mechanical, ka pae wela, a me nā mea ʻē aʻe.
ʻOi aku ka nui o ka adsorption o kahi kānana molekala ma mua o ka silica gel. ʻO kēia no ka mea he mea hoʻomaloʻo wikiwiki ka sieve.
ʻOi aku ka maikaʻi o ka sieve molecular ma mua o ka silica gel i nā wela kiʻekiʻe, no ka mea, ʻoi aku kona ʻano like ʻole e hoʻopaʻa ikaika i ka wai.
Ma ka haʻahaʻa haʻahaʻa haʻahaʻa, ʻoi aku ka maikaʻi o ka sieve molecular ma mua o ka silica gel.
Ua wehewehe ʻia ke ʻano o kahi kānana molecular a loaʻa nā pores like ʻole, aʻo ke ʻano o ka silica gel he amorphous a he nui nā pores irregular.
Pehea e ho'ā ai i nā kānana Molecular
No ka ho'ā ʻana i nā kānana molekala, ʻo ke koi kumu ka hoʻolaha ʻana i nā wela kiʻekiʻe kiʻekiʻe, a pono ke kiʻekiʻe o ka wela no ka adsorbate e vaporize. E ʻokoʻa ka mahana me nā mea i hoʻopili ʻia a me ke ʻano o ka adsorbent. E koi ʻia kahi pae wela mau o 170-315oC (338-600oF) no nā ʻano kānana i kūkākūkā mua ʻia. ʻO nā mea ʻelua i hoʻopili ʻia, a me ka adsorbent ua wela i kēia mahana. ʻO ka maloʻo maloʻo he ala wikiwiki e hana ai i kēia a koi aku i nā mahana haʻahaʻa haʻahaʻa e like me ka hoʻomaloʻo ʻana i ka lapalapa.
Ke ho'āla ʻia, hiki ke mālama ʻia nā kānana i loko o kahi pahu aniani me kahi parafilm i kāwili ʻia. Mālama kēia iā lākou a hiki i ʻeono mahina. No ka nānā ʻana inā ʻeleʻele nā kānana, hiki iā ʻoe ke hoʻopaʻa iā lākou i kou lima i ke kau ʻana i nā mīkina lima a hoʻohui i ka wai iā lākou. Inā ikaika loa lākou, a laila piʻi nui ka mahana, a ʻaʻole hiki iā ʻoe ke paʻa iā lākou ʻoiai ke kau nei i nā mīkina lima.
Hoʻohana ʻia ka hoʻohana ʻana i nā mea palekana e like me ka PPE kits, nā mīkina lima, a me nā aniani palekana e like me ke kaʻina o ka hoʻōla ʻana o nā kānana molekala e pili ana i ka mālama ʻana i nā wela kiʻekiʻe a me nā kemika, a me nā pilikia pili.
Ka manawa hoʻouna: Mei-30-2023
