Coal tar pitch (CTP) is a quite promising candidate for the production of porous carbons. Traditionally, the porous carbons are prepared by the heat treatment of carbon precursors in the presence of template and activator. In this paper, EDTA-Na₂Mg•4H₂O and CTP were mixed to produce porous carbons in the absence of template and activator, which were generated in situ by the heat treatment of EDTA-Na₂Mg•4H₂O. The pyrolysis and morphology behavior of the mixture of EDTA-Na₂Mg•4H₂O and coal tar pitch (EDTA-Na₂Mg•4H₂O@CTP) were studied by thermogravimetry and differential scanning calorimetry, Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. The characteristics of the obtained porous carbons were characterized by N₂ adsorption-desorption isotherm. The results show that EDTA-Na₂Mg•4H₂O has a great influence on the pyrolysis and morphology of CTP. The pyrolysis behavior of CTP becomes complicated after the addition of EDTA-Na₂Mg•4H₂O for the physical and chemical changes of EDTA-Na₂Mg•4H₂O during the heat treatment. EDTA-Na₂Mg•4H₂O@CTP dehydrates at 160°C and decomposes Na₂CO₃ and MgO at 600°C. The surface morphology of EDTA-Na₂Mg•4H₂O@CTP changes with the EDTA-Na₂Mg•4H₂O content and heat treatment temperature. After acid washing of the product of EDTA-Na₂Mg•4H₂O@CTP heat-treated at 700°C, the obtained porous carbon material consists of micropores and mesopores. Its specific surface area is 574.18 m² g⁻¹ and the average pore width is 4.53 nm.

中文翻译：

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EDTA-Na2Mg•4H2O和煤焦油沥青的热解形态行为及其在多孔碳中的应用

煤焦油沥青（CTP）是生产多孔碳的非常有前途的候选人。传统上，多孔碳是通过在模板和活化剂存在下对碳前体进行热处理而制备的。在本文中，EDTA钠₂的Mg•4H ₂ O和CTP进行混合，以产生在不存在模板和活化剂，将其在原位EDTA-Na组成的热处理产生的多孔炭₂的Mg•4H ₂ O的EDTA-Na ₂ Mg•4H ₂ O与煤焦油沥青（EDTA-Na ₂ Mg•4H _2）的混合物的热解和形态行为通过热重法和差示扫描量热法，傅立叶变换红外光谱，X射线衍射和扫描电子显微镜研究了O @ CTP）。通过N ₂吸附-解吸等温线表征获得的多孔碳的特性。结果表明，EDTA-Na ₂ Mg•4H ₂ O对CTP的热解和形貌有很大影响。CTP的热解行为变得加入EDTA钠后复杂₂的Mg•4H ₂ O代表EDTA-Na组成的物理和化学变化₂的Mg•4H ₂ ö在热处理。EDTA-Na ₂ Mg•4H ₂ O @ CTP在160°C脱水并分解Na在600°C下₂ CO ₃和MgO。EDTA-Na ₂ Mg•4H ₂ O @ CTP的表面形貌随EDTA-Na ₂ Mg•4H ₂ O的含量和热处理温度的变化而变化。酸洗EDTA-Na ₂ Mg•4H ₂ O @ CTP的产物在700°C热处理后，得到的多孔碳材料由微孔和中孔组成。其比表面积为574.18 m ²  g ^-1，平均孔径为4.53 nm。