Appendix E: Accessories
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2' (2 Filters) 3' (4 Filters) 4' & 5' (6 Filters) 6' (8 Filters)
Inlet
Concentration
Evap.
Rate
(ml/min)
Organic
Chemical
SPGR MW
Organic
Vapor
Adsorbed
Filter
Capacity
Estimated
Filter Life
Estimated
Check Life
Adsorbed
Weight
Adsorbed
Volume
Adsorbed
Weight
Adsorbed
Volume
Adsorbed
Weight
Adsorbed
Volume
Adsorbed
Weight
Adsorbed
Volume
10 ppm 0.15 Acetone 0.79 58.1 2% 40 hours 10 hours 135 g 171 ml 270 g 342 ml 405 g 513 ml 540 g 684 ml
10 ppm 0.20 Ethyl
Acetate
0.90 88.1 9% 120 hours 30 hours 608 g 675 ml 1216 g 1350 ml 1824 g 2025 ml 2432 g 2700 ml
10 ppm 0.22 Toluene 0.87 92.1 20% 240 hours 60 hours 1350 g 1552 ml 2700 g 3104 ml 4050 g 4656 ml 5400 g 6208 ml
If the inlet concentration is decreased to 1 ppm, then the estimated filter life
will be increased by an average factor of 5. Likewise, if the inlet
concentration is increased to 25 ppm, then the estimated filter life will be
decreased by an average factor of 2. Experience with routine use will
establish a predictable filter life that is representative of your specific
chemical work.
Impregnated Carbon Filter Life
To estimate impregnated carbon filter life for acids, formaldehyde-formalin,
and ammonia, use the following chart below. The values in the chart below
are expressed in weight (grams) and volume (milliliters) which can be used to
estimate Filter Life from a known usage.
For example, you estimate that 37% hydrochloric acid is being used at 500
ml per week and want to know how to program the Filter Life timer for a 3'
Paramount. A 3' Paramount uses 40 pounds of impregnated carbon at 17%
estimated life before saturation. 17% of 40 pounds is equivalent to 3060
grams of available carbon. There are 424 g/L of hydrochloric acid in a 37%
solution. Thus, there are 3060 grams/424 g per L or 7.2 Liters (7200 ml) of
hydrochloric acid before saturation. Assuming there are 10 hours of use per
week at 500 ml per week, the expected Final Life is programmed at 140
hours and the Check Life is programmed at 40 hours and it comes from the
following calculation:
(7200 ml/500 ml/week) * 10 hours/week = 144 hours, rounded to 140 hours
2' (2 Filters) 3' (4 Filters) 4' & 5' (6 Filters) 6' (8 Filters)
Chemical
Impregnated
Carbon
Adsorbed
Filter Capacity
Adsorbed
Weight
Adsorbed
Volume
Adsorbed
Weight
Adsorbed
Volume
Adsorbed
Weight
Adsorbed
Volume
Adsorbed
Weight
Adsorbed
Volume
37% Hydrochloric Acid 17% 1530 g 3600 ml 3060 g 7200 ml 4590 g 10800 ml 6120 g 14400 ml
67% Nitric Acid 12% 1080 g 1150 ml 2160 g 2300 ml 3240 g 3450 ml 4320 g 4600 ml
96% Sulfuric Acid 11% 990 g 560 ml 1980 g 1120 ml 2970 g 1680 ml 3960 g 2240 ml
37% Formaldehyde or Formalin 10% 900 g 2250 ml 1800 g 4500 ml 2700 g 6750 ml 3600 g 9000 ml
50% Ammonia Solution
(Ammonium Hydroxide)
10% 990 g 1980 ml 1980 g 3960 ml 2970 g 5940 ml 3960 g 7920 ml
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