CAJ | 학술논문

为探索煤中小分子化合物在整个煤阶中的赋存方式及溶出规律,采用正己烷溶剂对年轻褐煤至无烟煤八种煤样进行分次萃取,分析了一定时间段内各煤样萃取率的变化规律,并对各次萃取物进行GC分析.结果表明,煤中小分子化合物的三种赋存形态即游离态、微孔嵌入态及网络嵌入态,在整个煤阶中具有普遍规律性;不同煤阶煤的累积萃取率与累计萃取时间均服从对数函数关系;分次萃取率及总萃取率与碳含量均呈现"椅子"形曲线关系;正己烷可溶小分子化合物中的Ⅱ型分子最容易析出,Ⅰ型分子次之,Ⅲ型分子最难溶出,且Ⅰ型分子仅在烟煤中才有显现;煤的变质过程基本符合煤的三大变质反应过程即芳构化反应过程、裂解碎化加氢稳定反应过程和缩合反应过程的观点.
위탐색매중소분자화합물재정개매계중적부존방식급용출규률,채용정기완용제대년경갈매지무연매팔충매양진행분차췌취,분석료일정시간단내각매양췌취솔적변화규률,병대각차췌취물진행GC분석.결과표명,매중소분자화합물적삼충부존형태즉유리태、미공감입태급망락감입태,재정개매계중구유보편규률성;불동매계매적루적췌취솔여루계췌취시간균복종대수함수관계;분차췌취솔급총췌취솔여탄함량균정현"의자"형곡선관계;정기완가용소분자화합물중적Ⅱ형분자최용역석출,Ⅰ형분자차지,Ⅲ형분자최난용출,차Ⅰ형분자부재연매중재유현현;매적변질과정기본부합매적삼대변질반응과정즉방구화반응과정、렬해쇄화가경은정반응과정화축합반응과정적관점.
CT To investigate the exiting state and solubilization characteristics of small molecule compounds in the entire coal rank, eight coals ranged from young lignite to anthracite were extracted with n-hexane and sampled in batches. The change law of extraction rate in a certain period was discussed, and the extracts were analyzed with GC. The results show that the three existing forms of small molecules: free state, micropore-inbuilt state and network-inbuilt state, consist in every coal and show universal rules for the entire coal rank. The relationship between the cumulative extraction rate and cumulative extraction time of coals in different rank are subject to logarithmic function. The curve of fractionated extraction rate or the total extraction rate to carbon content represent the "chair" shape. TheⅡ-type molecules in the n-hexane-soluble small molecule compounds are most likely to dissolve, followed by Ⅰ-type molecular, and then Ⅲ-type, especially theⅠ-type molecular just appear in the bituminous coal. The metamorphic reaction process basically submit to three stages, which is the aromatization process, splitting hydrogenation and stability reaction process, and the condensation reaction process.