[Production Version] Daily Question 2018-5-3 (Short Answer)
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What is the purpose of two-stage conversion of methane vapor? The methane in a portion of the converted gas is further converted; air is added to provide the nitrogen required for ammonia synthesis, while part of the converted gas is burned to achieve internal heat supply
The methane in a portion of the converted gas is further converted; air is added to provide the nitrogen required for ammonia synthesis, while a part of the converted gas is burned to achieve internal heat supply.
The methane in a portion of the converted gas is further converted; air is added to provide the nitrogen required for ammonia synthesis, while part of the converted gas is burned to achieve internal heat supply
The conversion of methane mainly involves steam reforming, uncatalyzed partial oxidation, and catalyzed partial oxidation. Methane steam reforming is an endothermic reaction that requires a externally heated one-stage reformer; such equipment demands high-quality materials, is expensive, and uses large amounts of catalyst, and it is typically used for converting natural gas with high methane content. Uncatalyzed partial oxidation does not use a catalyst; instead, coke oven gas is mixed with oxygen using burners, and partial oxidation of the coke oven gas takes place in a suitable combustion space (the reformer furnace should have an appropriate height-to-diameter ratio). Studies have shown that compared to catalyzed partial oxidation, this method eliminates the need for large amounts of steam added to increase the equilibrium conversion rate of CH4 and to prevent carbon deposition on the catalyst. Additionally, less oxygen is required, and maintaining a reaction temperature of around 1200–1400°C results in a more favorable hydrogen-to-carbon ratio in the converted products
The methane in a portion of the converted gas is further converted; air is added to provide the nitrogen required for ammonia synthesis, while a part of the converted gas is burned to achieve internal heat supply.
The methane in a portion of the converted gas is further converted; air is added to provide the nitrogen required for ammonia synthesis, while a part of the converted gas is burned to achieve internal heat supply.
The uncatalyzed partial oxidation method does not use a catalyst; instead, coke oven gas is mixed with oxygen using a burner, and partial oxidation of the coke oven gas takes place in a suitable combustion chamber (the converter furnace should have an appropriate height-to-diameter ratio). Reports indicate that, compared to the catalyzed partial oxidation method,
The conversion of methane mainly involves steam reforming, uncatalyzed partial oxidation, and catalyzed partial oxidation. The steam reforming of methane is an endothermic reaction
The methane in a portion of the converted gas is further converted; air is added to provide the nitrogen required for ammonia synthesis, while part of the converted gas is burned to achieve internal heat supply
The methane in a portion of the converted gas is further converted; air is added to provide the nitrogen required for ammonia synthesis, while part of the converted gas is burned to achieve internal heat supply