Relationship between Raman parameters and char reactivity The hydrogasification

These H radicals would preferentially attack the amorphous carbon surface including the fragments of organic molecules, smaller aromatic ring systems and heteroaromatic ring systems. These attacks lead to the rearrangement of smaller aromatic rings and change to larger ones. The hydrogen radicals can also penetrate deep into the char matrix [43] and [44] to accelerate the aromatic ring condensation reaction [45], thus causing the sharp decrease in ID3/IG and ID1/IG in the first stage.