Functional Mechanism of Inorganic Sodium on the Structure and Reactivity of Zhundong Chars during Pyrolysis
Functional Mechanism of Inorganic Sodium on the Structure and Reactivity of Zhundong Chars during Pyrolysis
复制标题
无机钠对准东炭热解过程中结构和反应活性的作用机制
DOI：
10.1021/acs.energyfuels.7b02253
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发表时间：
2017-09
期刊：
影响因子：
5.3
通讯作者：
Xiang Jun
中科院分区：
文献类型：
--
作者：
Tang Hao;Xu Jun;Dai Zejun;Zhang Liangping;Sun Yi;Liu Wei;Mostafa Mohamed Elsayed;Su Sheng;Hu Song;Wang Yi;Xu Kai;Zhang Anchao;Xiang Jun
准东煤的高钠含量对准东煤的反应性有显著影响。研究了无机钠（NaCl）对准东炭结构和反应性的影响机理。在不同的热解温度和时间下，在单床反应器中制备了焦炭。初步实验结果表明，无机钠对准东煤热解后的炭产率具有双重影响：在≥600℃的高温热解条件下，无机钠会降低煤的炭产率，而在400℃的低温热解条件下，无机钠会提高煤的炭产率。利用氮吸附技术和扫描电镜研究了无机钠对准东焦炭物理结构的影响。结果表明：无机钠对炭的孔隙结构有不利影响，抑制了炭囊泡的生长，有利于形成光滑的炭表面；傅里叶变换红外光谱和拉曼光谱…
The reactivity of Zhundong chars is remarkably affected by the high sodium content of their parent Zhundong coal. The functional mechanism of inorganic sodium (NaCl) on the structure and reactivity of Zhundong chars was investigated in this study. Chars were prepared in a single-bed reactor under different pyrolysis temperatures and durations. Preliminary experimental results showed that inorganic sodium has a dual effect on the char yield of pyrolyzed Zhundong coal: inorganic sodium can decrease char yield at high pyrolysis temperatures of ≥600 °C but increase char yield at the low pyrolysis temperature of 400 °C. Nitrogen adsorption technique and scanning electron microscopy were utilized to identify the effects of inorganic sodium on the physical structure of Zhundong chars. The results showed that inorganic sodium affects pore structure detrimentally, inhibits the growth of char vesicles, and enables the formation of smooth char surfaces. Fourier transform infrared spectroscopy and Raman spectroscopy ...
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