Active gas components
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What primarily determines the level of hydrogen content among the effective gaseous components?
You can figure this out by considering element balance – where does the hydrogen in hydrogen gas come from? The materials fed into the furnace contain hydrogen, and that’s all the help I can give you; you’ll need to think about the rest by yourself...
It seems that carbon monoxide, carbon dioxide, and methane are relatively easy to explain; hydrogen is mentioned less often
In gasification, the effective gas refers to CO+H2. The hydrogen content in the gasified mixture is related to the reactions that take place; if the shift reaction occurs more frequently (CO+H2O=CO2+H2), then there will be more hydrogen in the syngas
The hydrogen in gas comes mainly from water; in fixed-bed gasification, water originates from the steam in the gasifying agent and the water contained in the coal. In slurry coal gasification, it comes from the water in the coal slurry and the water in the coal. In dry coal powder gasification, it comes from the water in the coal and the steam in the gasifying agent. Under certain conditions, water can undergo a hydrolysis reaction with carbon and carbon dioxide to produce hydrogen gas.