Abstract
The development of lignite pyrolysis and gasification technology is helpful to improve the utilization value of lignite which is abundant in China. From the point of view of mass and energy balance, simulation of lignite pyrolysis and gasification process in equilibrium were conducted. The effects of moisture and ash in lignite and fixed carbon retention rate on reaction results were systematically discussed. The results were shown that yield and quality of gas and coke yield decreased with the increase of moisture in lignite. With the increase of ash content, the coke yields increased, the carbon content of coke decreased and the coke quality became poor. As the retention rate of fixed carbon increased from 50% to 100%, both coke yield and quality increased, the carbon content of coke rose from 47.04% to 94.09% and coke yield rose from 88.84% to 94.09%.
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