Journal
NEW CARBON MATERIALS
Volume 34, Issue 3, Pages 258-266Publisher
ELSEVIER
DOI: 10.1016/S1872-5805(19)60015-6
Keywords
Coal tar pitch; Petroleum pitch; Bromination; Co-carbonization; Coke
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Funding
- National Natural Science Foundation of China [51174144]
- Shanxi Province Key Fund [201703D121037-1]
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After the quinoline insoluble fraction was removed, petroleum pitch (PP) was brominated under ultraviolet light irradiation for 3 to 9 h with a bromine to PP mass ratio of 1:20 to prepare brominated PPs (BPPs). Synthetic pitches (SPs) were produced from these BPPs by mixing them with refined coal tar pitch (RCTP) using a solvent (5 wt% benzoyl chloride)-assisted mixing method, using different mass ratios of BPP/RCTP, and BPPs with different irradiation times. The SPs were carbonized to prepare semicokes. The properties and carbonization behavior of the SPs were investigated by FT-IR spectrometry, H-1 NMR, thermo. gravimetry and viscometry, and the optical texture of the semicokes was examined by polarized-light microscopy, X-ray diffraction and scanning electron microscopy. Results indicate that converting PP into BPPs increases its reactivity with RCTP, which is beneficial for developing an ordered texture during carbonization. A high-quality coke with a highest yield of 50.1 wt% was prepared from the optimum SP made from BPP brominated for 6 h and a mass ratio of BPP to RCTP of 1:9.
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