,N.LY T:-:'-:' PAGE AND TiE SU'-',!A7a PAGE ABLE
HIEL-D Oil THIS FILZ
T-.-= F"'L:, 'z--?CRT GX,' BE SEEN ON APPLICATION
tO 07-,TT,-t"l FILILIZ
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NO. RD.311-~n S 1 12. 64
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BATCo document for Province of British Columbia 9
November 1999
CP


Research & Develo'Dr-lent
Brit i sh-Aimer ican Totaccc Co.
Souzhamptor...
4 th Decerr-ber, 1964.
AP?RAISAL OF ACTIVE CAP30~IS
(Report No.RD.311'-R)
Twen-.y representative grades of carbon have been
eyardned with re-sPect.
to their capacity for removing aliphatic aldehydes
and inorganic cyan-_*66s
froz, cigarette smoke.
7 he results are presented as (a) filtration
efficiencies of gran-.;Iar
beds of slandard weight; (b) filtration
efficiencies of 5 mr.. granjlar
beds and (c) the carbon costs per 1000 such
granular filters of fixed
adso-rotive capacity.
The carbon costs per 1000 filters wh ich have
filtzatior. efficiencias
SO*/-' for the a~-ove smoke consti-,uents vary
from 1.45 d. To 17.94 6.
-g-';ze for the National Coal Board's sample D is
1.45 d. This car'--on, Iho%-.-ever,
is at -Lhe moment being produced on the pilot
scale only but full-sca:e
be expected within a year. For Sutcliffe Speakman
2033 charcoal, -'Itrat-or.
e
f-iciencies ~: 80% for the two constituents are
achieved at a cos-' o-: d./
iO0O filters. For its adsorptive capacity, this is
the cheapest ca:bz~n
exa.m;ned wh-*ch is currently. avaJ lable in bulk.
Many of the grades examined show different
capacities for t"-.e s:rzke
constituents measured suggesting that blends or
mixtures of two or .7,cz-= cazZo.1
grades may have advantages in producing filters of
more compzehensiva
adsorptivity.
BATCo document for Province of BritiSh Columbia 9
November 1999