Novel investigation of pyrolysis mechanisms and kinetics for functional groups in biomass matrix

Preparation and properties of vermiculite modified by triphenylbutylphosphonium bromide and PBAT composite film

“…As shown in Figure 6, a typical PBAT waveform can be seen in the pure PBAT IR spectrum, which has peaks near 3000 cm À1 for the vibrational absorption peaks of CH 3 and CH 2, 25,26 1710 cm À1 for the distinct carbonyl absorption vibration peak, 27,28 1410 cm À1 for the bending vibrational absorption peak of O CH 2 , 1270 cm À1 for the C O bond in the ester bond, 29 and 1100 cm À1 for the band attributed to the C O left-right symmetrical stretching vibration, 30 corresponding to PBAT aliphatic fraction; 1460 cm À1 is the in-plane bending vibration absorption peak of the benzene ring CH 2 , the in-plane bending vibration absorption peak of the benzene ring of C H is at 1020, 873, and 726 cm À1 are the out-of-plane bending vibration absorption peaks of the benzene ring of C H, the out-of-plane bending vibration absorption peak of C H in the benzene ring generally occurs at 830 cm À1 , but the absorption at 726 cm À1 is spectrally characteristic due to the conjugation of C O with the benzene ring and can be used as a marker to identify PBAT, the above corresponds to the aromatic fraction of PBAT, 31 no new waveforms appeared in the P4@VMT/PBAT composite film, and the bending vibrational absorption peaks of Si O Si appeared only at 445 cm À1 . 32…”

Development of a Microwave-Assisted Bench Reactor for Biomass Pyrolysis Using Hybrid Heating

“…Compared to raw SCB, pyrolysis at high temperatures reduced the intensity of O–H axial deformations (around 3433 cm –1 ) in the biochar FTIR spectra (Figure ). Such decrease is often attributed to dehydration and decarboxylation reactions that indicate a certain level of degradation in the polymeric structures of carbohydrates and lignin …”

“…The bands at 1607, 1500, and 1430 cm –1 are typical of the skeletal vibrations of aromatic rings in lignin. However, the latter may also be partially attributed to C–H deformations . Typical C–O stretching bands at 1254 cm –1 refer to phenolic groups of lignin .…”

Deoxygenation-enhanced chemical looping gasification: a new pathway to produce hydrogen from biomass

“…According to the published reports, the peak at 3100-3700 cm −1 is assigned to the -OH stretching vibration, the peak at 2700-3000 cm −1 denotes the aliphatic C-H functional group, the peak at 1700 cm −1 corresponds to the unbound carboxyl, aldehyde and aliphatic ketone in biology, the peak at 1440-1600 cm −1 represents the aromatic region, and the C-O-C stretching of phenol (S unit) and the aryl ether bond (G unit) are located at 1220 cm −1 and 1270 cm −1 , respectively. [45][46][47] Under the condition of deoxidizer participation, the lower OH signal is still retained, and the aromatic region shows more peaks. The C-O-C vibration of phenol (S unit) at 1270 cm −1 is enhanced, indicating that the formation of the S unit structure has been promoted.…”