Purification Technology Edition: Daily Question [2017-10-30]
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Why is the methanol washing tower divided into an upper column and a lower column, and what is the theoretical basis for this? Answer: The main basis is the selectivity of solvent absorption, as hydrogen sulfide has a higher solubility in methanol than carbon dioxide. This allows hydrogen sulfide to be absorbed in the lower column. The heat of dissolution released during the absorption of hydrogen sulfide and thiocarbonic acid in that column is compensated by the desorption heat of carbon dioxide in methanol, thereby preventing an increase in temperature in the desulfurization section. It facilitates the absorption of hydrogen sulfide and thionocarbene.
The basis is the selectivity of solvent absorption
I came to learn this; this is an answer found elsewhere. The main basis is the selectivity of solvent absorption, as hydrogen sulfide has a higher solubility in methanol than carbon dioxide; this allows hydrogen sulfide to be absorbed in the lower column. The heat of dissolution released during the absorption of hydrogen sulfide and thiocarbonic acid in that column is compensated by the desorption heat of carbon dioxide in methanol, thereby preventing an increase in temperature in the desulfurization section. It facilitates the absorption of hydrogen sulfide and thionocarbene.
The main basis is the selectivity of solvent absorption, as hydrogen sulfide has a higher solubility in methanol than carbon dioxide; this allows hydrogen sulfide to be absorbed in the lower column. The heat of dissolution released during the absorption of hydrogen sulfide and thiocarbonic acid in that column is compensated by the desorption heat of carbon dioxide in methanol, thereby preventing an increase in temperature in the desulfurization section. It facilitates the absorption of hydrogen sulfide and thionocarbene.
The main basis is the selectivity of solvent absorption, as hydrogen sulfide has a higher solubility in methanol than carbon dioxide; this allows hydrogen sulfide to be absorbed in the lower column. The heat of dissolution released during the absorption of hydrogen sulfide and thiocarbonic acid in that column is compensated by the desorption heat of carbon dioxide in methanol, thereby preventing an increase in temperature in the desulfurization section. It facilitates the absorption of hydrogen sulfide and thionocarbene.
The main basis is the selectivity of solvent absorption, as hydrogen sulfide has a higher solubility in methanol than carbon dioxide; this allows hydrogen sulfide to be absorbed in the lower column. The heat of dissolution released during the absorption of hydrogen sulfide and thiocarbonic acid in that column is compensated by the desorption heat of carbon dioxide in methanol, thereby preventing an increase in temperature in the desulfurization section. It facilitates the absorption of hydrogen sulfide and thionocarbene.
The main basis is the selectivity of solvent absorption, as hydrogen sulfide has a higher solubility in methanol than carbon dioxide; this allows hydrogen sulfide to be absorbed in the lower column. The heat of dissolution released during the absorption of hydrogen sulfide and thiocarbonic acid in that column is compensated by the desorption heat of carbon dioxide in methanol, thereby preventing an increase in temperature in the desulfurization section. It facilitates the absorption of hydrogen sulfide and thionocarbene.
The main basis is the selectivity of solvent absorption, as hydrogen sulfide has a higher solubility in methanol than carbon dioxide; this allows hydrogen sulfide to be absorbed in the lower column. The heat of dissolution released during the absorption of hydrogen sulfide and thiocarbonic acid in that column is compensated by the desorption heat of carbon dioxide in methanol, thereby preventing an increase in temperature in the desulfurization section. It facilitates the absorption of hydrogen sulfide and thionocarbene.
Because hydrogen sulfide has a higher solubility in methanol than carbon dioxide, this allows hydrogen sulfide to be absorbed in the lower column. The heat of dissolution released during the absorption of hydrogen sulfide and thiocarbonic acid in that column is compensated by the desorption heat of carbon dioxide in methanol, thereby preventing an increase in the temperature in the desulfurization section. It facilitates the absorption of hydrogen sulfide and thionocarbene; the main basis for this is the selectivity of solvent absorption
The main basis is the selectivity of solvent absorption; since H2S has a higher solubility in methanol than CO2, it is possible to absorb H2S in the lower column. Additionally, the heat of dissolution released during the absorption of H2S and COS in the lower column is compensated by the desorption heat of CO2 in methanol, preventing an increase in the temperature in the desulfurization section and thus facilitating the absorption of H2S and COS.
The main basis is the selectivity of solvent absorption; since H2S has a higher solubility in methanol than CO2, it is possible to absorb H2S in the lower column. Additionally, the heat of dissolution released during the absorption of H2S and COS in the lower column is compensated by the desorption heat of CO2 in methanol, preventing an increase in the temperature in the desulfurization section and thus facilitating the absorption of H2S and COS.