1. Iodine Value: Represents the number of milligrams of iodine (iodine molecule diameter approximately 0.6 nm) adsorbed by 1 gram of activated carbon. A high iodine value indicates that the activated carbon has well-developed micropores and a large specific surface area. It primarily represents the adsorption potential for small molecules and gaseous volatile organic compounds (such as benzene and formaldehyde molecules). The iodine value test cannot reflect the characteristics of mesopores (2-50 nm) and macropores (>50 nm).
2. Lwm qhov ntsuas:
• Carbon Tetrachloride Adsorption Rate: Xav paub ntau ntxiv txog kev ntsuam xyuas lub peev xwm adsorption rau cov organic vapors, feem ntau siv hauv cov pa roj- kev ntsuas theem carbon.
• Methylene Blue Adsorption Tus nqi: Cov methylene xiav molecule muaj txoj kab uas hla ntawm kwv yees li 1.5 nm. Qhov ntsuas no tshwj xeeb yog siv los ua tus yam ntxwv ntawm kev loj hlob ntawm mesopores (tshwj xeeb nyob ib puag ncig 2-3 nm). Nws yog ib qho tseem ceeb heev rau kev tshem tawm cov organic molecules loj hauv kev kho dej.
• Molasses Tus Nqi / Caramel Decolorization Rate: Kev sim siv cov caramel loj dua, tshwj xeeb tshaj yog ntsuas qhov adsorption muaj peev xwm ntawm ultra- loj mesopores, feem ntau siv rau decolorization hauv qab zib thiab MSG kev lag luam.
• Surface Chemical Properties (Cov pab pawg ua haujlwm):
• Acidic oxygen-muaj cov pab pawg ua haujlwm (xws li carboxyl thiab phenolic hydroxyl pawg): Muaj zog hydrophilic, pab txhawb cov adsorption ntawm polar molecules (xws li cawv, aldehydes, thiab amines).
• Cov pab pawg ua haujlwm yooj yim: muaj zog lipophilic, ua kom yooj yim rau cov adsorption ntawm cov tsis-polar lossis tsis muaj zog polar molecules (xws li benzene thiab carbon tetrachloride). Cov no tuaj yeem hloov kho los ntawm kev hloov kho saum npoo.
• Lub zog / Abrasion Tus nqi: Hauv kev siv tswv yim (xws li lub txaj ruaj khov thiab lub txaj fluidized), cov pa roj carbon granular yuav tsum tiv taus siab thiab kev sib txhuam. Lub zog tsis txaus tuaj yeem ua rau pulverization thiab kaw qhov system.
• Cov ntsiab lus tshauv: cov ntsiab lus tsis muaj teeb meem. Cov hmoov tshauv siab tuaj yeem nyob hauv qhov pores, txo qhov muaj peev xwm adsorption, thiab tseem tuaj yeem ua rau muaj kev cuam tshuam tsis zoo hauv qee qhov kev siv catalytic. • Granularity los yog Shape: Hmoov, granules, los yog honeycomb lug - txhua tus muaj cov kev cai sib txawv rau cov xwm txheej.
• Cov khoom siv lossis cov nqi txiav txim siab: Xaiv cov pa roj carbon activated nrog tus nqi siab -kev ua tau zoo uas ua tau raws li qhov yuav tsum tau ua, es tsis yog xaiv ib qho uas muaj iodine ntau tshaj plaws.
3. Daim Ntawv Thov Scenario txiav txim siab qhov kev xaiv zoo tshaj plaws
Kev ua haujlwm ntawm cov pa roj carbon activated tsis tsuas yog zoo dua nrog cov nqi iodine ntau dua. Tus nqi iodine tsuas yog ib qho ntawm cov cim tseem ceeb rau kev ntsuas nws lub peev xwm adsorption. Txawm hais tias nws yog "zoo" thaum kawg yog nyob ntawm koj qhov kev thov tshwj xeeb (xws li hom thiab concentration ntawm cov pa phem raug kho, txheej txheem txheej txheem, thiab lwm yam).
Thaum lub hom phiaj yog me me molecules thiab tsawg -concentration pollutants, siab -iodine- nqi activated carbon muaj qhov zoo.
Thaum lub hom phiaj yog cov molecules loj, siab -concentration, los yog tej yam kuab paug, siab -iodine- nqi activated carbon tej zaum yuav muaj shortcomings.
4. Cov lus xaus thiab kev yuav khoom tawm tswv yim
Lub tswv yim tseem ceeb ntawm "kev ua haujlwm ntawm cov pa roj carbon monoxide tsis yog tsuas yog zoo dua nrog tus nqi iodine ntau dua" yog qhov sib piv yog qhov tseem ceeb. Nyob rau hauv luv luv, tus nqi iodine yog ib qho tseem ceeb nkag tau - theem qhia, tab sis tsis txhais tau tias tsuas yog ib qho kev txiav txim siab. Nws yuav tsum tau ua raws li cov yam ntxwv ntawm cov pa phem, cov hom phiaj kho mob, thiab kev siv nyiaj txiag. Ib tug scenario, ib qho kev daws teeb meem; activated carbon kev ua tau zoo ntsuas tsuas yog ntsuas ntawm cov pa roj carbon activated, tab sis qhov tsim nyog yog qhov ua rau nws zoo activated carbon.