Tracking and analyzing the structures and morphologies of mesocarbon microbeads (MCMBs) in air oxidation process

Research on Coal Tar Pitch Catalytic Oxidation and Its Effect on the Emission of PAHs during Co-Carbonation with Coal

“…The absorption at 1440 cm −1 is characteristic of the out-of-plane bending vibration of the C-H bond in the methyl or methylene group and the aromatic ring skeleton vibration, which intensity increases, reflecting the CH 2 content of the aromatic ring increases. The extensive absorption at 1180 cm −1 is caused by the C-O-C stretching vibration on the aromatic ring, which increases with the oxidation time, meaning that the condensation reactions between the aromatic rings are mainly proceeded by Ar-R-O-R-Ar bonding [10]. The weak peaks in the range of 700-900 cm −1 represent the absorption in the aromatic substitution region, which is induced by the out-of-plane vibration of the aromatic hydrocarbon structure [47].…”

“…Ayoe Benk [9] stated that the improvement in the quality of asphalt as a binder is due to the increase in asphaltene by the action of oxygen in the air, therefore, high-strength coal with a tensile strength of 50.45 NM/m 2 was obtained using air-oxidized CTP blended with phenolic resin as a coal binder and cured at 200 • C for 5 h. In addition, the air oxidized CTP can also be used as a raw material for preparing materials such as mesophase carbon microspheres and carbon fibers [10,11]. Above, CTP can be used effectively after air oxidation.…”

Study on Fabrications and Storage Capacity of Coal Tar Pitch Based V₂O₃@C Composite Materials

“…Additionally, the intensities of peaks (744 cm ¹1 ) assigned to the benzene groups in WS-CTPs remarkably decreased, compared to that in CTPs, which indicates that esterification and etherification reactions between the groups substituted on the polycyclic aromatic hydrocarbons (PAHs) probably existed in the fabrication processes of WS-CTPs. 18 The peak (1180 cm ¹1 ) assigned to the -C-O groups were clearly observed in WS-CTPs, which was the effective evidence to indicate that esterification and etherification reactions existed among the PAHs in WS-CTPs. 18 The formations of these groups facilely lead to the proceeding of polycondensations among the PAHs.…”

“…18 The peak (1180 cm ¹1 ) assigned to the -C-O groups were clearly observed in WS-CTPs, which was the effective evidence to indicate that esterification and etherification reactions existed among the PAHs in WS-CTPs. 18 The formations of these groups facilely lead to the proceeding of polycondensations among the PAHs. 18,19 After the same carbonization processes were performed at 600 °C for 3 h in mixture gas (N 2 /H 2 = 9 : 1), the carbons obtained by different crude materials showed the different structures, which were verified by XRD measurements.…”

“…18 The formations of these groups facilely lead to the proceeding of polycondensations among the PAHs. 18,19 After the same carbonization processes were performed at 600 °C for 3 h in mixture gas (N 2 /H 2 = 9 : 1), the carbons obtained by different crude materials showed the different structures, which were verified by XRD measurements. As shown in Fig.…”