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As another example, a regulation might limit the concentration of particulate matter to 0.1 grain per standard cubic foot (i.e., scf) of dry exhaust gas corrected to 12 volume percent CO 2. Environmental agencies in the USA often denote a standard cubic foot of dry gas as "dscf" or as "scfd".
= milligrams of pollutant per cubic meter of air at sea level atmospheric pressure and T: ppmv = air pollutant concentration, in parts per million by volume T = ambient temperature in K = 273. + °C 0.082057338 = Universal gas constant in L atm mol −1 K −1: M = molecular mass (or molecular weight) of the air pollutant
This means that at this layer L = 0 and T = 220 K, so that the exponential drop is faster, with H TP = 6.3 km for air (6.5 for nitrogen, 5.7 for oxygen and 4.2 for carbon dioxide). Both the pressure and density obey this law, so, denoting the height of the border between the troposphere and the tropopause as U :
atmosphere-cubic centimetre per second: atm ccs [citation needed] ≡ 1 atm × 1 cm 3 /s = 0.101 325 W: atmosphere-cubic foot per hour: atm cfh [citation needed] ≡ 1 atm × 1 cu ft/h = 0.797 001 247 04 W: atmosphere-cubic foot per minute: atm cfm [citation needed] ≡ 1 atm × 1 cu ft/min = 47.820 074 682 24 W: atmosphere-cubic foot per ...
This regulation defines a standard cubic foot, for compressed or liquefied gases in refillable cylinders other than LPG by, "A standard cubic foot of gas is defined as a cubic foot at a temperature of 21 °C (70 °F) and a pressure of 101.325 kilopascals [kPa] (14.696 psia)". [4]
Molecular weight: 18 Specific gravity: 0.9626 Gravity, °API 15.5 Carbon/hydrogen ratio by weight 8.1 weight % carbon 61.2 weight % hydrogen 4.3 weight % oxygen: 7.4 weight % sulfur 3.9 weight % nitrogen 1.2 weight % ash: 12.0 weight % moisture: 10.0 Combustion air: Excess combustion air, % 12 15 20 Wet exhaust flue gas:
To convert heat values to joules per mole values, multiply by 44.095 g/mol. To convert densities to moles per liter, multiply by 22.678 cm 3 mol/(L·g). Data obtained from CRC Handbook of Chemistry and Physics , 44th ed. pages 2560–2561, except for critical temperature line (31.1 °C) and temperatures −30 °C and below, which are taken from ...
cubic foot per day: cubic feet per day: m3/d: Cubic foot per second: cuft/h: cu ft/h: 28316846592e-12/3600: cubic foot per hour: cubic feet per hour: m3/h: Cubic foot per second: cuft/min: cu ft/min: 28316846592e-12/60: cubic foot per minute: cubic feet per minute: m3/min: Cubic foot per minute: cuft/s: cu ft/s: 28316846592e-12: cubic foot per ...