ULY T;*'-:' TITLE PAC,--- LND THE cU,.7!AFY PAGE
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FiLL RLEPORT CAIJ BE. SLEIN 011 APPLICATIOA TO
C&NITRAL FI;Z~G
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D.S.F. Zsq.
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D--% S.j. Greer.
Dr. R.3. Gr~~ffith
L.O. L~porte, E:5q.
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C. Fieldsand, Esq.
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BATCo document for Province of British Columbia 9
November 1999


Rcz;earch & D,~vclopmc;nt
BritIz".-^.,-ncricc.n Tobacco C,=.par-Y Ltd,
2-.d
CHA?AC-IZ?ISAT.0N OF ACTIVE C.I?Z-OI.,S
(Raport No. RD--387-R)
A..
...D
us, S
c0 = _()..
nftroGen adsorption isothezrms of a range of
activated carZo-z. have
bcen measured and used to deduce surface areas and
approximaze pc-.e sizes.
have beer. made to relate these properties to the
filtrat-'cnal per-
fo-,-,z.r,ce bf -lie carbons in ciZarette filters.
There is a good correlation between the surface
area values of the
car-ons tested and their adsorption coefficients
for aldehydes c-A.Sarette
sr.o'-e as measured in filtrational experiments.
however, f or !WdroSen cyanid6
,~-4 correlation is less pronounced, because the
filtration is fuenced by
other properties of t-he carbons, sucn as the
chemical conpos.-ILtion, state of
sulbd-a*,vis' on, bu2-c density, and pore size.
it is proposed to extend this study to include the
zeasuremer;z of adzorp-:,-'Lo.-
isothems for adsorbates other t1han nitrogen. An
investigation of the effects
of the other variables will also be undertaken.
BATCo document for Province of British Columbia 9
November 1999