Lub luag haujlwm ntawm qhib siab lim dej hauv cov dej lim dej ntxuav kev lag luam

Cov khoom siv lim dej tseem ceeb tshaj plaws hauv kev lim roj carbon tshuab txais cov pa roj carbon tshuab, uas yog qhov tseem ceeb thiab feem ntau siv adsorbent hauv cov dej lim. Feem ntau siv rau hauv cov tshuab lim dej, nws tseem hu ua lub taub lim dej. Cov pa roj carbon tshuab hluav taws xob yog tsim los ntawm txiv maj phaub plhaub, lub plhaub txiv ntoo, thiab lwm yam raws li cov khoom siv raw, los ntawm carbonization, ua kom muaj zog, ua kom puas, tshuaj xyuas, xaiv cua, kom qhuav thiab lwm yam txheej txheem. Thaum ntxov li xyoo 1930, tib neeg siv cov pa roj carbon activated rau adsorb phenol los ntawm cov khib nyiab ntawm cov ntoo coking. Yog li, daim ntawv thov ntawm cov pa roj carbon activated nyob hauv kev kho dej muaj keeb kwm muaj ze li 80 xyoo.

Activated carbon lim keeb yog hom tshiab ntawm kev sib sib zog nqus txheej txheem lim, uas muaj cov txheej txheem zoo pore tom qab kev ua haujlwm tshwj xeeb. Nws cov adsorption kev ua tau zoo tuaj yeem kov yeej cov pa roj carbon hmoov zoo rau lub cev tag nrho cov pa roj carbon ntau cov pa roj carbon lim dej thiab tshem tawm cov teeb meem ntawm cov organic, raug teeb meem tawm, cov xaim, xeb, cov tshuaj chlorine, tsw ntxhiab, thiab lwm yam hauv cov kua. Cov peev txheej adsorption thiab cov tawm ntawm cov roj carbon lim dej ntawm lub tshuab lim dej yog cov cim tseem ceeb ntawm cov txheej txheem adsorption. Qhov luaj li cas ntawm adsorption muaj peev xwm ntsuas los ntawm tus nqi ntawm adsorption, thiab tus nqi adsorption hais txog qhov khoom muaj peev xwm adsorbed los ntawm qhov ntsuas qhov hnyav ntawm adsorbent hauv ib lub sijhawm. Hauv kev kho dej, cov adsorption nrawm txiav txim siab lub sijhawm sib tiv tauj ntawm cov dej phwj thiab cov adsorbent.

Feem ntau, qhov me me qhov loj me me ntawm cov lim dej lim dej ntawm lub taub lim dej, qhov nrawm dua ntawm cov pore diffusion tus nqi, thiab lub zog muaj zog adsorption ntawm lub tshuab txais carbon lim. Lub pH thiab qhov ntsuas kub ntawm kev lim dej kuj tseem ua rau lub adsorption ntawm cov pa roj carbon activated. Cov pa roj carbon tshuab hluav taws xob feem ntau muaj peev xwm ua kom muaj adsorption ntau dua nyob rau hauv cov kab mob kua qaub dua li nyob rau hauv cov dej cawv Cov tshuaj tiv thaiv adsorption feem ntau yog cov tshuaj tiv thaiv exothermic, yog li ntawd qhov kub tsis tshua muaj txiaj ntsig rau cov tshuaj tiv thaiv adsorption. Ntawm chav kawm, qhov peev xwm adsorption ntawm cov roj carbon activated yog cuam tshuam nrog kev mloog zoo ntawm cov dej phwj tuaj. Nyob rau ntawm qhov ntsuas kub, qhov adsorption ntau npaum li cas ntawm cov pa roj carbon ntau nce ntxiv qhov sib npaug ntawm cov adsorbed cov khoom nce ntxiv.

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