物理化学学报 >> 2002, Vol. 18 >> Issue (08): 710-715.doi: 10.3866/PKU.WHXB20020808

研究论文 上一篇    下一篇

CPCWS中水质子的核磁共振自旋晶格弛豫时间和化学位移

陈月华;郭贤荣;杜希林;郭国霖   

  1. 北京大学化学与分子工程学院，北京　100871;哈尔滨工程大学化学工程系,哈尔滨　150001
  • 收稿日期:2001-12-25 修回日期:2002-03-11 发布日期:2002-08-15
  • 通讯作者: 陈月华 E-mail:chenyh@chem.pku.edu.cn

The Spin-lattice Relation Time and Chemical Shift of Water in CPCWS by Proton NMR Spectroscopy

Chen Yue-Hua;Guo Xian-Rong;Du Xi-Lin;Guo Guo-Lin   

  1. College of Chemistry ＆ Molecular Engineering, Peking University, Beijing　100871;Department of Chemical Engineering, Harbin Engineering University, Harbin　150001
  • Received:2001-12-25 Revised:2002-03-11 Published:2002-08-15
  • Contact: Chen Yue-Hua E-mail:chenyh@chem.pku.edu.cn

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摘要： 运用核磁共振手段，揭示了浆体中水的形态及其动态行为，并研究浆体性质与之的关联.实验测得神府煤-石油焦-水浆（CPCWS）中水质子的化学位移与煤焦中煤的百分含量的线性关系.并从NMR测得束缚水的化学位移δb ，导出计算浆体中束缚水百分含量的公式.从CPCWS中水质子的化学位移与浆体表观粘度的相关曲线可确定最佳配比的浆体.测得全焦浆中水质子自旋-晶格驰豫时间T1比全煤浆大42倍，讨论了CPCWS的T1随煤含量的变化趋势.实验表明,T1可作为CPCWS中碳质点的疏水或亲水性以及水分子形态和动态行为的定量表征.

关键词: 煤-石油焦-水浆(CPCWS), 水质子, NMR-T1, 化学位移

Abstract: The coal-petroleum coke-water slurries(CPCWS) are complex fluids. It has been known that the 1H-NMR can provide the quantitative information on the hydrophobic property of carbonaceous solid and on the microstructure and dynamics behavior about water in the slurry. In this paper, 1H-NMR has been used to study the microstructure of water and their dynamics. Two relationships have been attained, that the chemical shifts of all water and the bound water in slurries, respectively, increase linearly with the increase of the weight percent of coal in the total of coal and petroleum coke (PC). The fraction of bound water can be obtained by a formula drawn from these two relationships. The spin-lattice relaxation time T1 of the PC-water slurry is 42 times longer than that of the coal-water slurry. The tendency of change of T1 with the increase of the coal content has been discussed.

Key words: Coal-petroleum coke-water slurries, Water proton, NMR-T1, Chemical shift