What is removed during liquefied gas purification?

This post was last edited by ylb913 on 2016-6-23 at 20:37. 1. What is known for now are the two related systems: LPG desulfurization and LPG desulfurization and dewaxing. 2. LPG desulfurization removes hydrogen sulfide, which is inorganic sulfur. The liquefied gas desulfurization and dewaxing unit removes thiols, which are organic sulfur compounds. 3. For liquefied gas desulfurization, inorganic sulfur refers to hydrogen sulfide. 4. LPG desulfurization and dewaxing is aimed at removing mercaptans. Mercaptans are organic sulfur compounds, but when they are oxidized, they turn into disulfides, which are also organic sulfur compounds. Disulfides are the products resulting from the oxidation of mercaptans in LPG desulfurization and dewaxing units, and these as well need to be removed. 5. Organic sulfur should contain carbon, while inorganic sulfur does not contain carbon. Sulfides, carbon disulfide, and carbonyl sulfide are all organic sulfur compounds; these are the main components in liquefied gas. The only inorganic sulfur compound present is hydrogen sulfide. 6. Some desulfurizing agents (for removing hydrogen sulfide) are said to be able to remove organic sulfur to some extent. Since these desulfurizing agents are reused, hydrogen sulfide can be removed through steam stripping for regeneration; but what about organic sulfur? I understand that it can only be partially removed by adding some kind of hydrolyzing agent to convert it into hydrogen sulfide, but from what I know, the removal rate is still quite low.