Continuous high-temperature fluidized bed pyrolysis of coal in complex atmospheres: Product distribution and pyrolysis gas

► Coal pyrolysis behaviors were studied in fluidized bed with continuous coal feed and char discharge. ► The yields of product were obtained in complex atmospheres at temperatures from 750 °C up to 980 °C. ► Raising the ER until 0.107, tar and char yields decreased, while gas and water yields increased. ► In O2-free atmosphere, adding CH4 into the atmosphere increased tar and char yields. ► Adding combustible gas into the N2 + O2 atmosphere increased the tar and char yields.