Insights into the functional group transformation of a chinese brown coal during slow pyrolysis by combining various experiments
Insights into the functional group transformation of a chinese brown coal during slow pyrolysis by combining various experiments
复制标题
结合各种实验深入了解中国褐煤在缓慢热解过程中的官能团转变
DOI：
10.1016/j.fuel.2013.10.081
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发表时间：
2014-02-01
期刊：
影响因子：
7.4
通讯作者：
Mochida, Isao
中科院分区：
文献类型：
--
作者：
Lin, Xiongchao;Wang, Caihong;Mochida, Isao
采用傅立叶变换红外光谱(FT-IR)、高分辨固体核磁共振(SS核磁共振)和拉曼光谱技术研究了热处理对中国褐煤结构转变的影响。初步论证了C-13偶极去偶幻角自旋(DDMAS)、H-1 MAS、H-1-H-1同核双量子(DQ)MAS和H-1-C-13交叉极化异核相关(CP-HETCOR)SS核磁共振方法在直接探测胜利褐煤焦官能团内质子和碳空间相互作用方面的广泛适用性。随着热解温度的变化，SL褐煤焦中存在两个不同的转变区间。初始分解(在
The effects of heat treatment on the structural transformation of a Chinese brown coal were studied using Fourier transform infrared spectroscopy (FT-IR), high resolution solid-state nuclear magnetic resonance (SSNMR), and Raman spectroscopic techniques. The wide applicabilities of C-13 dipolar-decoupling magic-angle-spinning (DDMAS), H-1 MAS, H-1-H-1 homonulcear double-quantum (DQ) MAS and H-1-C-13 cross-polarization heteronuclear correlation (CP-HETCOR) SSNMR approaches that directly probed the proton and carbon spatial interactions within functional groups of Shengli (SL) brown coal char were tentatively demonstrated. Two distinct transformation intervals, as a function of pyrolysis temperature, were clarified in the SL brown coal char. The initial decomposition (at