Description
Granular activated carbon for acid gases
Granular vapacid raw material: Coconut shell. Raw material vapacid pellet: Mineral coal. Particle size range (mesh): 4x10, 8x14, 14x30, or 4 mm pellet.
Presentation: 25 kg sacks, 100 kg bags.
Some applications of activated carbon to remove acid gases:
- Cartridge respirators (masks).
- Drainage odors.
- Desulfurization of biogas and natural gas.
- Air treatment in spaces where corrosion caused by acid gases must be avoided.
- Control in electronic components production areas.
Vapacid granular activated carbon is manufactured from coconut shell and impregnated with metal oxides that give it a high capacity for the removal of gases and acid vapors present in air. These acids can be organic such as acetic acid or mercaptans or inorganic such as sulfur dioxide and sulfuric, nitric, hydrochloric and phosphoric acids.
Vapacid Pélet is manufactured by dispersing hydroxyl groups in the porous structure of the activated carbon. Thus, in the finished product, the carbon contributes its large surface area, and the hydroxyl groups participate in the chemisorption of acidic compounds. Vapacid Pélet adsorbs more than twice as many mercaptans as a non-impregnated carbon, as it oxidizes them to disulfides (2 R-SH → R 2 S 2 ), which on the one hand are less odorous, and on the other hand, are more easily adsorbed. The standard mineral activated carbon from which Vapacid Pélet is produced, is of very high capacity, and has a form of cylindrical pellets of 4 mm diameter, which cause very low pressure drop in gaseous streams.
In the case of hydrogen sulfide removal, Vapacid catalyzes the H2S - oxygen reaction:
2 H2S + O2 = S8 + 2 H2O
Unlike other impregnated carbons, Vapacid minimizes sulfuric acid formation by inhibiting sulfuric acid-producing side reactions.
Vapacid activated carbon adsorbs more than twice as many mercaptans as unimpregnated carbon because it oxidizes them to disulfides (2 RSH R2S2), which are less odorous on the one hand and more easily adsorbed on the other.
Among the main applications of this product are: odor control in drain vents (called louvers) and in wastewater treatment plants; corrosion control and protection of electronic components in aggressive industrial environments; environmental control in museums or in specialty manufacturing areas, such as computer chips or pharmaceutical products; environmental control in processes using mineral acids.
Compounds retained:
- All types of vapors and acid gases.
- All types of organic vapors (although with lower capacity than non-impregnated carbon).
Compound with which organoleptic tests are suggested:
- Hydrogen sulfide (in gas phase it is called hydrogen sulfide:H2S: it is the typical rotten egg smell. It is produced by reacting ferrous sulfide with sulfuric acid).
Like all inorganic acids, it is a toxic compound, so it must be handled with care and in low concentrations.
Among acid vapors and gases, those mainly encountered in industry, commerce and society are:
- Acetic acid
- Acrylic acid
- Adipic acid
- Benzoic acid
- Hydrobromic acid (HBr)
- Butyric acid
- Caprylic acid
- Caproic acid
- Carbolic acid (carbolic acid, phenol)
- Cyclohexanecarboxylic acid
- Hydrochloric acid (HCl) (also called muriatic acid)
- Stearic acid
- Ethyldimethylacetic acid
- Phenylacetic acid
- Hydrofluoric acid (HF)
- Formic acid
- Phosphoric acid (H3PO4)
- Isobutyric acid
- Lactic acid
- Lauric acid
- Linoleic acid
- Linolenic acid
- Myristic acid
- Nitric acid (HNO3)
- Oleic acid
- Palmitic acid
- Perchloric acid
- Propionic acid
- Hydrogen sulfide (H2S) (typical rotten egg smell)
- Sulfuric acid (H2SO4)
- m-toluic acid
- O-toluic acid
- P-toluic acid
- Uric acid
- Valerianic acid
- Valeric acid
- Hydroiodic acid (HI)
- Hydrogen bromide (the correct name for hydrobromic acid in the gas phase)
- Hydrogen chloride (the correct name for hydrochloric acid in the gas phase)
- Sulfur dioxide (SO2)
- Chlorine dioxide (ClO2)
- Phenol (carbolic acid, carbolic acid, carbolic acid)
- Hydrogen sulfide (the correct name for hydrogen sulfide in the gas phase)
- Hydrogen iodide (the correct name for hydrogen iodide in the gas phase)