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Purification Technology Edition: Daily Question [2017-10-19]

2017-10-19View Original

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True or False: Low-temperature methanol washing: Under normal circumstances, it can be approximated that the solubility of gases is directly proportional to pressure and inversely proportional to temperature. The solubility of gases is related to the properties of the gases themselves as well as those of the solvent. Using methanol as a solvent, the solubility of hydrogen sulfide gas is about 6 times higher than that of carbon dioxide; as a result, much less solvent is required for washing and absorption. At low temperatures, acidic gases have a solubility hundreds of times higher than that of CO and H2, which enables selective absorption. () Yes

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