CAJ | 학술논문

通过先锋褐煤热处理和水热处理，结合处理煤结构与性质表征，研究了热处理和水热处理对先锋褐煤结构、抽提和溶胀性能的影响，探讨了热处理过程水的作用。结果表明，低于热解温度下的热处理以非共价键解缔合及部分弱共价键热解为主，水与煤的水热反应能够抑制水热处理过程中煤的热解和小分子化合物释放。高温热处理以热解和脱氧为主，水热反应可以稳定煤热解活性基团，避免其二次裂解和交联，在一定程度上提高处理煤的混合溶剂抽提率，改善其溶胀性能。
통과선봉갈매열처리화수열처리，결합처리매결구여성질표정，연구료열처리화수열처리대선봉갈매결구、추제화용창성능적영향，탐토료열처리과정수적작용。결과표명，저우열해온도하적열처리이비공개건해체합급부분약공개건열해위주，수여매적수열반응능구억제수열처리과정중매적열해화소분자화합물석방。고온열처리이열해화탈양위주，수열반응가이은정매열해활성기단，피면기이차렬해화교련，재일정정도상제고처리매적혼합용제추제솔，개선기용창성능。
Modification of low rank coal by thermal treatment is the key to its high-efficiency conversion and utilization. In this paper, the thermal treatment and hydrothermal treatment of Xianfeng lignite were carried out. By combination of the characterizations of structure and properties of treated coals, the modification of thermal treatment and the interaction of water in the hydrothermal process were investigated. The results indicate that the disassociation of non-covalent bonds and the pyrolysis of weak covalent bonds dominate in the treatment process below the pyrolystic temperature of lignite. The hydrothermal reaction can inhibit the pyrolysis of coal matrix and the release of small molecular compounds in the process of hydrothermal treatment. At higher than the pyrolysis of lignite, the thermal treatment shows obvious pyrolysis and deoxygenation. The hydrothermal reaction can provide active hydrogen to stabilize the pyrolysis fragment and avoid the secondary pyrolysis and condensation, so that the extraction and swelling properties of hydrothermal treated coal in mixed solvent were improve at certain extent.