Njira yopangira kaboni wokhala ndi mpweya nthawi zambiri imakhala ndi carbonization yotsatiridwa ndi kuyambitsa kwa zinthu za carbonaceous kuchokera ku masamba. Carbonization ndi chithandizo cha kutentha pa 400-800 ° C chomwe chimasintha zinthu zopangira kukhala kaboni pochepetsa zomwe zili ndi zinthu zosakhazikika komanso kuonjezera mpweya wa carbon. Izi zimawonjezera mphamvu zamagetsi ndikupanga mawonekedwe oyambira omwe amafunikira ngati kaboni iyenera kuyatsidwa. Kusintha zinthu za carbonization zingakhudze kwambiri chomaliza mankhwala. Kuwonjezeka kwa kutentha kwa carbonization kumawonjezera reactivity, koma nthawi yomweyo kumachepetsa kuchuluka kwa pores. Kutsika kwa ma pores uku kumachitika chifukwa cha kuchuluka kwa ma condensation a zinthu pa kutentha kwapamwamba kwa carbonization komwe kumabweretsa kuwonjezeka kwa mphamvu zamakina. Choncho, zimakhala kofunika kusankha olondola ndondomeko kutentha zochokera ankafuna mankhwala carbonization.
Ma oxides awa amafalikira kuchokera mu kaboni zomwe zimapangitsa kuti pang'ono pang'onopang'ono pakhale mpweya womwe umatsegula ma pores omwe anali atatsekedwa kale ndikupangitsa kuti mpweya wamkati ukhale wonyezimira. Mu activation ya mankhwala, mpweya umachitidwa pa kutentha kwambiri ndi dehydrating wothandizira kuti amachotsa ambiri wa haidrojeni ndi mpweya kuchokera mpweya kapangidwe. Kutsegula kwa Chemical nthawi zambiri kumaphatikiza gawo la carbonization ndi activation, koma masitepe awiriwa amatha kuchitikabe mosiyana malinga ndi ndondomekoyi. Malo okwera pamwamba pa 3,000 m2 / g apezeka pogwiritsa ntchito KOH ngati mankhwala oyambitsa mankhwala.
Mpweya Woyatsidwa kuchokera ku Zida Zosiyanasiyana.
Kuphatikiza pa kukhala adsorbent yogwiritsidwa ntchito pazinthu zosiyanasiyana, kaboni woyendetsedwa amatha kupangidwa kuchokera kuzinthu zambiri zopangira zosiyanasiyana, ndikupangitsa kuti ikhale yosunthika kwambiri yomwe imatha kupangidwa m'malo osiyanasiyana kutengera zomwe zilipo. Zina mwa zinthuzi ndi monga zipolopolo za zomera, miyala ya zipatso, matabwa, phula, zitsulo za carbides, carbon blacks, zinyalala za zinyalala zochokera ku zinyalala, ndi zinyalala za polima. Mitundu yosiyanasiyana ya malasha, yomwe ilipo kale mu mawonekedwe a 5 carbonaceous okhala ndi pore opangidwa ndi pore, amatha kukonzedwanso kuti apange activated carbon. Ngakhale activated carbon imatha kupangidwa kuchokera kuzinthu zilizonse zopangira, ndizotsika mtengo komanso zosamala zachilengedwe kupanga activated carbon kuchokera ku zinyalala. Ma carbon opangidwa kuchokera ku zipolopolo za kokonati awonetsedwa kuti ali ndi ma micropores ochuluka, zomwe zimawapanga kukhala zinthu zomwe zimagwiritsidwa ntchito kwambiri kuti zigwiritsidwe ntchito komwe kumafunika kukopa kwambiri. Utuchi ndi zida zina zamatabwa zilinso ndi ma microporous opangidwa mwamphamvu omwe ali abwino kuti adsorption kuchokera ku gawo la gasi. Kupanga activated carbon kuchokera ku azitona, maula, ma apricots, ndi miyala ya pichesi kumapereka ma adsorbents ofanana kwambiri ndi kuuma kwakukulu, kukana ma abrasion ndi kuchuluka kwa micropore. Zotsalira za PVC zimatha kutsegulidwa ngati HCl yachotsedwa kale, ndipo zotsatira zake zimakhala ndi carbon activated yomwe imakhala yabwino kwa methylene blue. Ma carbon activated apangidwanso kuchokera ku zinyalala zamatayala. Kuti tisiyanitse pakati pamitundu yambiri yoyambira yomwe ingatheke, ndikofunikira kuwunika zomwe zimachitika pambuyo poyambitsa. Posankha kalambulabwalo zinthu zotsatirazi ndi zofunika: enieni pamwamba pa pores, pore voliyumu ndi pore voliyumu kugawa, kapangidwe ndi kukula kwa granules, ndi kapangidwe mankhwala / khalidwe la mpweya pamwamba.
Kusankha kalambulabwalo koyenera kagwiritsidwe ntchito koyenera ndikofunikira kwambiri chifukwa kusiyanasiyana kwa zinthu zoyambira kumalola kuwongolera kapangidwe ka carbon pore. Ma precursors osiyanasiyana amakhala ndi ma macropores osiyanasiyana (> 50 nm,) omwe 6 amatsimikizira kuyambiranso kwawo. Ma macropores awa siwothandiza pakutsatsa, koma kupezeka kwawo kumalola njira zambiri zopangira ma micropores panthawi yotsegulira. Kuphatikiza apo, ma macropores amapereka njira zambiri zamamolekyu adsorbate kuti afikire ma micropores panthawi yotsatsa.
Nthawi yotumiza: Apr-01-2022