Raman spectroscopy of coal macerals and fluidized bed char morphotypes

► Raman parameters on collotelinite and fusinite are different from the corresponding fused char and fusinoid morphotypes. ► The highest differences occurring between collotelinite and corresponding fused chars. ► During pyrolysis major structural changes occur in collotelinite. ► Raman parameters of fused char and fusinoid portions are similar.