Factors affecting the gasification carbon conversion rate

The gasification reaction is a catalyze-free reaction; according to the Arrhenius equation and the theory of gas chemical reaction kinetics, the rate of gasification reaction is related to the reaction temperature, reaction activation energy, reaction pressure, and reactant concentration. The reaction activation energy is related to the reactivity of the coal fed into the furnace (its volatiles); when the volatiles in the coal remain stable over a certain period, their influence on the rate of coal gasification can be ignored. The reaction pressure remains relatively stable within the gasifier, so its effect on the rate of coal gasification can be ignored. The reactant concentration is related to the gasification reaction load; when the gasifier operates at a constant load, its impact on the rate of coal gasification can be ignored. Therefore, the gasification reaction temperature has a significant impact on the rate of coal gasification. Practice has shown that for every 10°C increase in reaction temperature, the reaction rate generally increases to 2–4 times the original rate. In the temperature range of 1500–1700°C for gasification reactions, a change of 10°C in the reaction temperature has a significant impact on the carbon conversion rate, which is reflected in the variation in carbon content in the fly ash. Generally, as the temperature of the gasification reaction increases, the carbon content in the fly ash decreases.

1. Properties of raw materials 2. Properties of coal slurry 3. Temperature and pressure in the gasifier 4. Atomization efficiency of the burner