Dab tsi yog Lub Cev Khoom Ntawm Adsorbents?

Qhov zoo adsorption kev ua tau zoo ntawm cov adsorbent yog vim nws qhov ntom ntom pore qauv. Cov yam ntxwv ntawm lub cev muaj feem xyuam rau qhov pores ntawm cov adsorbent yog:
a. Pore ​​ntim (VP): Lub ntim ntawm micropores nyob rau hauv lub adsorbent yog hu ua pore ntim, uas feem ntau yog qhia raws li lub ntim ntawm lub adsorbent micropores ib chav tsev qhov hnyav ntawm lub adsorbent (cm3 / g). Pore ​​ntim yog qhov ntim zoo ntawm cov adsorbent, Nws yog tus nqi suav los ntawm lub peev xwm saturated adsorption, uas yog lub ntim uas cov adsorbent tuaj yeem ua kom haum rau adsorbate, yog li qhov loj dua qhov pore ntim, qhov zoo dua. Lub pore ntim (Vk) ntawm cov adsorbent tsis tas yuav tsum sib npaug rau qhov pore ntim (VP). Tsuas yog cov micropores hauv cov adsorbent muaj cov nyhuv adsorption, yog li VP tsis suav nrog cov pores ntxhib. Vk suav nrog qhov ntim ntawm txhua qhov, uas feem ntau loj dua VP.
b. Cov cheeb tsam tshwj xeeb: uas yog, thaj chaw saum npoo ntawm ib chav tsev qhov hnyav ntawm qhov adsorbent. Chav tsev yog m2 / g. Qhov chaw saum npoo ntawm adsorbent thaj tsam ntawm ntau pua mus rau ntau tshaj ib txhiab square meters ib gram. Qhov chaw saum npoo ntawm cov adsorbent feem ntau yog qhov chaw ntawm phab ntsa micropore, thiab sab nrauv ntawm cov adsorbent yog me heev.
c. Pore ​​loj thiab pore loj faib: Nyob rau hauv lub adsorbent, cov duab ntawm lub pores yog tsis tshua muaj tsis xwm yeem, thiab qhov pore loj kuj txawv. Pores nrog ib lub cheeb ntawm ob peb angstroms (A0) mus rau kaum ntawm angstroms yog hu ua nplua pores, thiab pores nrog ib txoj kab uas hla ntawm ob peb puas angstroms los yog ntau tshaj yog hu ua coarse pores. Qhov pores ntau dua, qhov loj dua qhov pore ntim thiab qhov loj ntawm qhov chaw tshwj xeeb, uas yog qhov tsim nyog rau adsorption ntawm adsorbate. Lub luag haujlwm ntawm ntxhib pores yog muab txoj hauv kev rau adsorbate molecules kom nkag mus rau adsorbent. Kev sib raug zoo ntawm ntxhib pores thiab nplua pores zoo li txoj kev thiab alleys. Txawv teb chaws molecules tuaj yeem ncav cuag qhov tob ntawm adsorbent los ntawm cov pores ntxhib. Yog li ntawd, coarse qhov yuav tsum nyob rau hauv ib qho kev faib ua feem. Cov ntxhib thiab nplua pores nyob rau hauv adsorbents xws li activated carbon thiab silica gel yog tsim thaum lub sij hawm tsim khoom. Zeolite molecular sieves tsim cov muaju nrog ib txoj kab uas hla ntawm ob peb microns thaum lub sij hawm synthesis, tsuas yog cov pores zoo, thiab coarse pores ntawm crystals yog tsim thaum lub sij hawm molding.