Table 3 The two parameters deduced from Raman spectroscopy for char samples.

From: Catalytic depolymerization of a typical lignite for improving tar yield by Co and Zn catalyst

Sample

AD/AG

AD/A(GR+VL+VR)

Non.-Cat. char

1.38

1.44

Co-2 char

1.43

1.53

Zn-1 char

1.46

1.62