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摘要: 研究了五种神华抽余煤在不同溶剂中的溶胀动力学，考察了溶剂抽提对溶胀性能的影响，探讨了神华抽余煤的溶胀机理。实验结果表明，CS2/NMP混合溶剂抽余煤的溶胀速率随着溶胀温度升高而增大；溶剂抽提对抽余煤的溶胀具有较大影响，其中抽余煤在NMP溶剂中溶胀速率明显大于THN；抽提率越大的抽余煤，溶胀表观活化能越大，溶胀越难进行；两种溶剂中抽余煤溶胀表观活化能均小于10kJ/mol，表明其溶胀过程由溶剂分子的扩散控制。Abstract: In order to understand the mechanism of swelling and the relation between swelling behavior and solvent extraction, the swelling kinetics of residues from Shenhua coal extracted by CS2/NMP with different mixing ratios were studied in different solvents. The result shows that the swelling rates of extraction residues increase along with swelling temperature. The swelling rate in polar solvent NMP is much higher than that in nonpolar solvent THN. Solvent extraction has a great effect on the swelling of extraction residues. The swelling activation energy of extraction residues increases and the swelling rate decreases with the increase of extraction yield. The swelling activation energies of extraction residues in NMP and THN are less than 10kJ/mol, suggesting that the swelling process is controlled by solvent molecular diffusion in coal structure. Key words： coal; swelling; kinetics
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