Acetylene gas purification
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What process should be used to purify 98% acetylene to 99.9%? It seems that sodium hypochlorite absorption is not possible.
The purification of acetylene gas can be achieved using the following methods: 1. Adsorbents: Special adsorbents such as activated carbon or molecular sieves can be used to remove impurities and moisture from the gas stream. 2. Low-temperature fractionation: High-purity ethylene and acetylene can be separated through low-temperature cooling and distillation. 3. Pressure molar fraction method: Treating the original acetylene gas under a certain pressure using the pressure molar fraction method can improve the purity of the acetylene gas. Although sodium hypochlorite absorption can remove some hydrogen sulfide and smoke, its effect on purifying acetylene is not satisfactory. Therefore, in actual production, multiple methods need to be combined to purify and refine acetylene gas. .
Purifying 98% acetylene to 99.9% can be achieved using either physical adsorption or chemical adsorption; the specific processes are as follows: 1. Physical adsorption method: Molecular sieve materials are used to adsorb impurities, moisture, and other components present in acetylene. Commonly used molecular sieve materials include 3A, 4A, 5A, 13X, etc. For the purification of acetylene, 3A molecular sieves are typically selected, as they can increase the purity of acetylene to over 99.9%. 2. Chemical adsorption method: Materials with special adsorption properties such as activated carbon are used to remove impurities from acetylene, thereby increasing its purity. Compared with the physical adsorption method, this method has a better adsorption effect.