What are the applications of activated alumina in industrial gas treatment?
The applications of activated alumina in industrial gas treatment mainly include the following aspects:
1.Gas Drying and Purification
Activated alumina, as an efficient desiccant, can deeply dry a variety of industrial gases such as acetylene, air, nitrogen, carbon dioxide, hydrogen, and natural gas, with a dew point as low as - 55°C. After adsorbing water vapor, it can be regenerated by heating and reused. It is often used for gas purification in oxygen production, textile, electronics industries, and air separation units. In addition, it can also adsorb acidic substances (such as hydrogen chloride and sulfur dioxide) and hydrocarbon gases, improving gas purity.
2.Catalyst and Carrier
Activated alumina is an important catalyst carrier, which is widely used in the petrochemical field. For example, in heavy oil hydrodesulfurization (Co - Mo/γ - Al₂O₃, Ni - W/γ - Al₂O₃ catalysts), olefin isomerization reactions, and hydrogen exchange reactions. In automobile exhaust treatment, it serves as a carrier for precious metal catalysts to promote the oxidation of harmful gases such as hydrocarbons and carbon monoxide.
3.Special Gas Treatment
It is used as an arsenic removal agent in the acid - making industry, a defluorinating agent for high - fluoride drinking water, and for the deacidification regeneration of transformer oils. It can also adsorb lubricating oil vapors from contaminated oxygen, hydrogen, natural gas, etc., protecting equipment performance.
4.Power System Maintenance
In power systems such as transmissions and brakes, activated alumina can continuously treat engine oil, removing organic acids and precipitates, and prolonging the service life of the oil.
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