【摘要】 研究了不同比例溴化石油沥青（Brominated petroleum pitch, BPP）和精制煤沥青（Refined coal tar pitch, RCTP）在苯甲酰氯存在下得到的沥青（Synthetic pitch, SP）性质以及共炭化对焦结构有序性产生的影响。利用红外光谱仪、氢核磁共振仪、热重仪和黏度仪对SP性质和炭化行为进行分析表征。所得半焦和焦的光学组织分别通过偏光显微镜、X射线衍射仪和扫描电子显微镜进行了观察。结果表明,由10 wt%溴化BPP（6 h）得到的沥青（Typical synthesized pitch,TP）炭化产率可达50.1 wt%;与未溴化石油沥青相比,BPP与RCTP共炭化产生的半焦,其有序性得到了提高,晶格参数d₀₀₂和L_c得到改善。说明石油沥青中溴的引入增加了同RCTP的反应活性,有利于改善焦的结构。更多还原

【Abstract】 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, ~1H NMR, thermogravimetry 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.更多还原