What is the decomposition temperature of elemental sulfur?
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This post was last edited by Shandong Huaxing on 2010-6-13 05:55. Hello everyone! There’s a question that has been bothering me! It is the decomposition temperature of liquid sulfur (elemental sulfur)! I’ve never encountered such a problem before either! We use the technique of injecting elemental sulfur for sulfur injection production here! Stop adding sulfur when the reaction temperature is below 320 degrees! I also asked them, saying that the decomposition temperature of liquefaction is around 320 degrees, right? There’s no exact answer either! I heard it from someone else! So I was wondering if any expert knows the answer! Is the liquefaction temperature of liquid sulfur also 150 degrees? Urgent! Urgent! Urgent! ! ! !
When heated or cooled, sulfur exhibits the following behavior: it melts from a yellow solid at 112.8°C to a yellow liquid; at 250°C it becomes a dark brown viscous liquid; at 300°C it turns into a dark brown liquid that is easier to flow; at 444.6°C it transforms into an orange-yellow gas; at 650°C it becomes a grass-yellow gas; and at 900°C it turns into a colorless gas.
This post was last edited by nickel on 2010-6-13 09:59. The evaporation temperature of liquid sulfur is affected by pressure, or rather, by the sulfur partial pressure. I haven’t heard of the concept of a decomposition temperature. Elemental sulfur exists in various forms; the common ones are disulfur, hexasulfur, and octasulfur. These forms are present at different temperature ranges – disulfur is more abundant at high temperatures such as 1000 degrees Celsius, while octasulfur is more common at lower temperatures. The physical properties of elemental sulfur in different forms vary.
Reply to 1# Lonely Soul: Thank you! Very detailed! I’ve been looking for it for a long time! I really thank you so much
The normal storage temperature for liquid sulfur is around 150°C, as this is when its viscosity is at its lowest. At temperatures above 150°C and below 320°C, liquid sulfur has very high viscosity. When the temperature exceeds 320°C, its viscosity drops back to that at around 150°C. Therefore, I think this is also the main reason why you chose that temperature for feeding. Additionally, the melting point of sulfur is 115.6°C, not 150°C.