dav
Cov pa roj carbon lim dej ua ntej tshaj plaws yog cov dej hauv cov dej purifiers. Qhov loj ntawm thaj tsam ntawm cov tshuab activated ua rau nws zoo heev adsorbent rau ntau cov kab mob hauv cov dej haus. Qhov chaw ntawm activated carbon yog tsuas yog coal (anthracite, bituminous thee, lignite), txiv maj phaub plhaub, peat thiab roj av raws li seem.
Feem ntau carbonaceous cov ntaub ntawv muaj qee qhov degree ntawm porosity thiab muaj ib qho hauv cheeb tsam sab hauv thaj tsam ntawm 10-15 m 2 / g (m 2 / g). Qhov ua kom cov roj muaj cov txheej txheem uas tswj cov oxidation ntawm cov xaim hluav taws xob ntawm cov pa carbon atom ntawm cov pa kub, qhov sab hauv uas yog muaj zog mus rau 1000-1200 m 2 / g.
Cov txheej txheem ua kom tsim muaj lub network ntawm pob qhov me me (qhov los yog qhov sib xyaw) ntawm cov kab sib txawv ntawm qhov sib tw, uas ua rau cov dej mus rau hauv lub dav hlau sab hauv los ntawm kev ua kom. Lub apertures yog feem ntau grouped raws li nram no:
Micropores <>
Nruab nrab qhov 4-500nm
Loj qhov> 500 nm (feem ntau yog 500-2000 nm)
Nm yog nanometer. Nws yog ib tug billionth (10-9) meters
Lub adsorption ntawm cov kab mob hauv cov dej nyob saum npoo ntawm activated carbon yuav yog los ntawm hydrophobicity ntawm molecules. Tej zaum nws kuj yog vim muaj kev sib haum xeeb ntawm cov kab mob paug rau carbon, los yog nws yuav yog vim ob leeg.
Cov khoom siv hydrophobic yuav khi zoo tshaj cov pa roj carbon dioxide rau cov khoom siv hydrophilic. Feem ntau cov kab mob hauv cov dej hauv cov dej haus yog cov roj ntsha. Lawv khi zoo rau qhov tsis-thoob plawv cov pa hauv qhov hauv pores. Cov pa roj carbon monoxide poov xab muaj ntau yam, nrog rau ntau cov organic compounds, tshuaj tua kab thiab herbicides, thiab tshuaj tua kab mob xws li trihalomethanes.
