Issues regarding organic sulfur and methanation side reactions in partial conversion processes with a low carbon monoxide to water vapor ratio in the first year of high school-level studies
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Colleagues, has anyone worked with conversion processes that feature a low water-gas ratio for carbon monoxide production, such as those used in space furnaces, Shenning furnaces, GSP processes, or Shell’s powder gasification methanol production processes with low water-gas ratios? Have issues related to organic sulfur side reactions and methanation side reactions occurred? To what extent are these side reactions severe, and how do you control the problems they cause? Everyone is welcome to speak up!
Generally speaking, when the water-to-gas ratio falls below 0.4, there is a strong tendency for methanation side reactions and organic sulfur side reactions to occur; thiols pose a significant burden on low-temperature methanol washing!
What are organic sulfur side reactions? Typically, the conversion rate of COS is low due to a low water-to-gas ratio, which affects its absorption in low-temperature methanol washing. A low water-gas ratio and high temperature will intensify the methanation reaction; since the water-gas ratio is already low, then control the temperature
The approach of controlling high temperatures is correct; it is based on this approach that heat transfer transformations occur. However, high-temperature areas will still exist, as well as side reactions involving methanation and organic sulfur.