Regarding volatile matter
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What is the theoretical basis for the claim that the higher the volatile matter content in coal, the greater its reactivity? How to explain it?
Generally, coal with a high volatile matter content is younger, and therefore has better reactivity.
What role does volatile matter play in the gasification reaction?
After the moisture in the coal powder is removed, the volatiles precipitate first. Gases are more reactive; the higher the volatility, the easier the reaction ； Moreover, as volatiles are released, the pores in the coal powder particles become more developed, which is favorable for the gasification reaction
The main components in coal that participate in reactions are volatile matter and fixed carbon. In fixed-bed gasification technology, volatiles begin to undergo dry distillation at lower temperatures; the higher the volatility of the coal, the greater the porosity or internal surface area of the coke formed as a result of dry distillation, and consequently, its reactivity is also higher.