Comparative Study on the Pyrolysis Behaviors of Pine Cone and Pretreated Pine Cone by Using TGA–FTIR and Pyrolysis-GC/MS

Abstract

Pine cone (PC) is a potential biomass energy source and is rich in nonstructural substances (NSS). To understand the impact of these NSS on the pyrolysis behavior and its products, in this study, phenol alcohol extraction was used for the separation of NSS from PC (the PC after separation of NSS was labeled as A-PC), and then thermogravimetric analysis −Fourier transform infrared and PY-gas chromatography/MS detection techniques were used to conduct a systematic comparison of the thermal degradation behaviors and kinetics parameters of PC and A-PC. Results showed that the N content of PC was higher than that of other biomass, and the activation energies of PC and A-PC generally decreased at first and then increased as the conversion rate increased. Furthermore, the activation energy of PC decreased with conversion rates in the range of 0.25–0.30, while A-PC lagged significantly behind PC. On the other hand, the maximum absorption peak of CH4 for PC was higher than that of A-PC, and the maximum absorption peak of CO2 was quite the opposite. After extracting NSS from the PC, its activation energy was significantly increased.

Effects of biochar pyrolysis temperature on thermal properties of polyethylene glycol/biochar composites as shape-stable biocomposite phase change materials

“…Although the lowest proportion of macropores was found on BC800, it is worth noting that its loading ratio of PEG was low owing to scarce surface binding sites caused by over-pyrolysis process at 800 °C. 45,46 As a result, the latent heat of PCS800 was low. The effects of surface activity of supporting materials on loading ratio and leakage resistance of PEG/CSBC ss-BCPCMs can be confirmed by FT-IR and DTG analysis as Fig.…”

Thermal Stability Evaluation of T152 Emulsifier on the Modification Influence of Fireworks Propellant

“…The corresponding spectral absorption peak positions of the two samples are similar. The CO 2 absorption peaks of the two samples correspond at 2358 cm −1 [35], and the CO 2 absorption peaks in this wave number range are greatly enhanced when the pyrolysis temperature rises from 82-427 • C. The mass loss peak at 80-430 • C in the thermogravimetric curves of Figures 3 and 4 is related to the decomposition of the propellant to produce CO 2 . The telescopic vibration peak near 1510 cm −1 is N=O, indicating that the nitro compounds in the fireworks propellant begin to decompose at this stage [36].…”

A highly efficient and sustainable photoabsorber in solar-driven seawater desalination and wastewater purification

“…The main and nal decomposition occurred between 200 °C to 545 °C, and was due to losing chemisorbed water molecules and the decomposition of hemicellulose, cellulose, and lignin. 71,72 Aerward, ue gases such as CO 2 , CH 4, and, H 2 O were released, which further reduced the mass of PC during the process. 72 Moreover, the combustion process of PC ended at about 545 °C.…”