Nowe metody opisu struktury porowatej węgli aktywnych na podstawie danych adsorpcyjnych

• Autorzy: Choma J. , Jaroniec M.

Warianty tytułu

EN

New methods enabling description of the porous structure of active carbons on the basis of adsorption data

• Języki publikacji: PL

Abstrakty

EN

The porous structure of the MAXSORB 20-SPD active carbon was characterized using nitrogen adsorption isotlierm at 77 K in a wide range of relative pressures (10[-7] to 0.995). It was shown that analysis of the distribution function of the adsorption potential permits evaluation of the total specific surface area, micropore volume and average micropore size. For many active carbons the adsorption potential distribution function lias tvo peaks; one of them corresponds to the monolayer formation on the surface of tfie micropore walls, and tlie other one reflects the volume filling of the micropores. The minimum between tliese two peaks can be identified as the point of the monolayer completion. It allows calculating the total specific surface area of the active carbon, which agrees with that evaluated on tlie basis of the DTF method. Assuming the model of slit-like pores it is possible to determine also the average pore size. It appears that the adsorption potential distribution can be of utility in characterizing the porous structure of active carbons.

Słowa kluczowe

PL

węgle aktywne; struktura porowata; opis struktury porowatej; dane adsorpcyjne

• Wydawca: Polskie Zrzeszenie Inżynierów i Techników Sanitarnych, Oddział Dolnośląski
• Czasopismo: Ochrona Środowiska
• Rocznik: 1999
• Tom: nr 3
• Strony: 13--17
• Opis fizyczny: Bibliogr.13 poz., rys., wykr.

Twórcy

autor

Choma J.

autor

Jaroniec M.

• WAT Instytut Chemii Warszwa, ul.Kaliskiego 2