Ozone Conversions & Equations

Physical Properties : Standard conditions P = 1013.25 MB, T = 273.3 K

• Density of ozone : 2.14 kg/m³
• Density of oxygen : 1.43 kg/m³
• Density of air : 1.29 kg/m³
• Density of water : 1,000 kg/m

USEFUL CONVERSION FACTORS: (for water)

• 1,000 liters = 1 m³ = 264 US gallons
• 1 gal = 3.785 liters = 3,785 ml
• 1 m³ = 35.3 ft3 = 264 US Gallons

OZONE CONCENTRATION IN WATER

• 1 mg/l = 1 PPM O₃ = 1 g O₃/m³ water {By weight}

OZONE CONCENTRATION IN AIR BY VOLUME

• 1 g O₃ / m³ = 467 PPM O₃
• 1 PPM O₃ = 2.14 mg O₃/m³
• 100 pphm (parts per hundred million) = 1 ppm (parts per million)

OZONE CONCENTRATION IN AIR BY WEIGHT

• 100 g O₃ / m³ = 7.8% O₃ (Approximate)
• 1% O₃ = 12.8 g O₃/m³ (Approximate)

OZONE CONCENTRATION IN OXYGEN BY WEIGHT

• 100 g O₃/m³ = 6.99% O₃ (Approximate)
• 1% O₃ = 14.3 g O₃/m³ (Approximate)

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Convert gaseous O₃ concentration from g/m³ to ppm by volume --- [PPM O₃ = C x 467]
(Example: 2.14 g/m³ at standard conditions = 1,000 ppm)

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Also:

If we know concentration in g/m³ and flowrate in LPM, we can calculate output in g/hr.

We use the following formula :

Concentration(g/m³) X Flowrate(lpm) X 0.001(m³/liter) = O₃output (g/minute)
(Example: An ozone generator produces an ozone concentration of 28.7 g/m³ at 2.9 lpm flowrate)
We simply plug in the values:
28.7 g/m³ X 2.9 lpm X (1 m³/1,000 liters) = 0.083 g/minute
0.083 g/minute x 60 minutes = 4.9 g/hr