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Coal structure undergoes a series of complex changes during pyrolysis which can affect the gasification reactivity. Lignite was used as raw sample to prepare char samples by pyrolyzing under CO2 and N2 atmospheres in the temperature range 500–800°C in a fixed-bed reactor. The structural features of chars were characterized by N2 adsorption analyzer and FT–Raman spectroscopy. The reactivity of chars...
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