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Table 4 The types of main volatiles from different extracted residual pyrolysis

From: Reinforcement of the bio-gas conversion from pyrolysis of wheat straw by hot caustic pre-extraction

Wave number (cm−1)

Functional group

Compounds

3964–3000

O–H

Water

3200–2850

C–H stretch

Alkanes

2860–2770

C=O stretch

Aldehydes

2217–2391

C=O stretch

Carbon dioxide

2150–2122

C=O stretch

Carbon monoxide

1507

Aromatic skeleton vibration

Aromatic

1300–1400

O–H

Phenols

1040–1180

C–H stretch OH or C–O bending stretch

Alcohols

965–1435

 

Furaldehyde (R)