Cair is an Activated Coconut Charcoal (or Activated Coconut-based Carbon) based air purifier that utilizes the characteristics of activated Coconut charcoal to adsorb odour and chemical toxins from the air.
Charcoal works on the principle of Adsorption (not absorption).
What is Adsorption?
It is a chemical reaction where the atoms, ions or molecules of a gas, liquid or solid element adhere to the surface of another element, creating a film of adsorbate on the surface of the adsorbent.
In Cair, the Activated Coconut Charcoal is the adsorbent while the molecules of bad odour and chemical toxins captured by it form the adsorbate film in its pores.
The Difference between Adsorption and Absorption
Absorption is a process where a fluid is dissolved by a liquid or a solid element (absorbent). The molecules of the fluid assimilate through the bulk of the liquid/solid absorbent. The process is unaffected by temperature and occurs at a uniform rate throughout the material.
Adsorption, on the other hand, only occurs at the surface – hence the need to have fine granules of activated coconut charcoal that have an extremely large (combined) surface area. It occurs better in lower temperatures and the rate of adsorption rapidly increases until it reaches saturation.
The Use of Activated Carbon for Air Purification
Ancient Egyptians, way back in 3150 BC, discovered charcoal’s ability to absorb odours. Since then, charcoal has been used in a variety of ways as a way for purifying the air. It wasn’t, however, till the Industrial Revolution in Europe that the use of charcoal became widespread.
Since then, charcoal and – more specifically – activated charcoal has been used in various applications such as industrial air and water purifiers, treating ingested poisoning, in gas masks, soil nutrition, and much more.
What is Activated Charcoal?
Charcoal is a black residue containing, primarily, Carbon – obtained by burning of wood, bamboo or coconut shells in the absence of oxygen (pyrolysis).
When created, the charcoal-surface contains a number of pores. When activated (a chemical reaction to increase the number of pores), 1 gram of charcoal can have a surface area between 500sq. m. to 3000 sq. m.
The basic math is this: The higher the surface area, the more chemical toxin and odour molecules it can adsorb.
Why Activated Coconut Charcoal?
In Coconut Charcoal, micro-pores (less than 2 nanometre diameter) cover almost 90-95% of the entire charcoal surface. Compared to 1 gram of wood-based charcoal, which has larger pores (Macro-pores or more than 50nm diameter), there are more pores on Coconut charcoal.
As a result, Coconut Charcoal adsorbs more harmful chemical toxin and bad odour molecules than regular charcoal.
Coconut Charcoal also has higher pore-volume (millilitres per gram) than regular charcoal – in other words, 1 gram of coconut charcoal can hold more molecules of chemical toxins and bad odour, than 1 gram of regular charcoal.
Finally, steam-activated coconut charcoal (which is what Cair contains), creates additional pores within each pore, thereby increasing the adsorption capability of (the already more adsorbent) coconut charcoal.
Also, steam-activation is a natural process that does not involve any chemicals – which is not the case with regular charcoal activation, which involves several non-environment friendly chemicals.
Are there any laboratory tests conducted to prove the worthiness of Activated Coconut Charcoal as an air purifier?
There are plenty of laboratory tests that support the use of Activated Coconut Charcoal for the purification of various chemicals in the air.
Here are some of them:
- Control of Acetone in Air
- Control of Formaldehyde in Air
- Control of Diethyl Ether in Air
- Control of Isopropyl Alcohol in Air
- Control of Methyl Ethyl Ketone in Air
- Control of Methyl Chloride in Air
- Control of O-Xylene in Air
- Control of Toulene in Air
- Adsorption Qualities for Carbon, Zeolite and Polymers
- Adsorption of Hydrochloric Acid, Sulfuric Acid, Hydrogen Cyanide, Ammonia, Chlorine gas and other organic vapours
- Treatment of Volatile Organic Compounds
- Activated Carbon for pollution control
- Removal of Ozone
In some cases, activated charcoal has been used in place of activated coconut charcoal. Please note: activated coconut charcoal has effectively the same properties as regular activated charcoal, only better!
What Kind of Chemicals does Cair Adsorb?
Cair adsorbs the following chemical, toxin and odour molecules from the air around you (in varying degrees):
|Cyclohexanol||Hydrogen Cyanide||Paint & Redecorating Odours|
|Acetic Acid||Cyclohexanol||Hydrogen Fluoride||Palmitic Acid|
|Acetic Anhydride||Cyclohexene||Hydrogen Iodide||Paradichlorbenzine|
|Alcoholic Beverages||Dichloroethylene||Iodoform||Perfumes, Cosmetics|
|Amyl Alcohol||Dichloroprpane||Isopropyl acetate||Poison Gases|
|Amyl Ether||Dichlorotetrafluoroethane||Isopropyl Alcohol||Pollen|
|Aniline||Diesel Fumes||Isopropyl Ether||Popcorn and Candy|
|Asphalt Fumes||Diethylamine||Kerosene||Poultry Odours|
|Automobile Exhaust||Diethyl Ketone||Kitchen Odours||Propane|
|Body Odours||Dimethylsulfate||Menthol||Propionic Acid|
|Bromine||Diproyl Ketone||Methane||Propyl Alcohol|
|Burned Flesh||Ethane||Methil Acetate||Propyl Chloride|
|Burned Food||Ether||Menthyl acrylate||Propyl Ether|
|Butadiene||Ethyl Acetate||Methyl Alcohol||Propyl Mercaptan|
|Butane||Ethyl Acrylate||Methyl Bromide||Propylene|
|Butanone||Ethyl Alcohol||Methyl Butyl Ketone||Propyne|
|Butyl Acetate||Ethyl Amine||Methyl Cellosolve||Putrefying Substances|
|Butyl Alcohol||Ethyl Benzene||Methyl Cellosolve Acetate||Putrescine|
|Butyl Cellosolve||Ethyl Bromide||Methyl Chloride||Pyridine|
|Butyl Chloride||Ethyl Chloride||Methyl Chloroform||Resins|
|Butyl Ether||Ethyl Ether||Methyl Ether||Rubber|
|Butylene||Ethyl Formate||Methyl Ethyl Ketone||Sauerkraut|
|Butyne||Ethyl Mercaptan||Methyl Formate||Sewer Odours|
|Butyraldehyde||Ethyl Silicate||Methyl Isobutyl Ketone||Skalote|
|Butyric Acid||Ethylene||Methyl Mercaptan||Slaughtering Odours|
|Caprylic Acid||Ethylene Dichloride||Methylcyclohexanol||Sour Milks|
|Carbolic Acid||Ethylene Oxide||Methylcyclohexaone||Stoddard Solvent|
|Carbon Disulfide||Essential Oils||Methylene Chloride||Styrene Monomer|
|Carbon Dioxide||Eucalyptole||Monochlorobenzene||Sulfur Dioxide|
|Carbon Monoxide||Fertilizer||Monofluorotri Cloromethane||Sulfur Trioxide|
|Carbon Tetrachloride||Film processing odors||Naphtha||Sulfuric Acid|
|Cellosolve Acetate||Floral Scents||Nitric Acid||Tetrachloroethylene|
|Cheese||Fluorotrichloromethane||Nitro Benzenes||Tobacco Smoke Odour|
|Chlorobenzene||Formic Acid||Nitrogen Dioxide||Toluene|
|Citrus and other Fruits||Heptylene||Nonane||Urea|
|Cleaning Compounds||Hexane||Octalene||Uric Acid|
|Coal Smoke||Hexylene||Octane||Valeric Acid|
|Cresol||Hydrogen||Organic Chemicals||Varnish Fumes|
|Cychlohexane||Hydrogen Chloride||Packing House Odours|
If you have any more questions regarding Cair and how it works, please get in touch with us!