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.
The coal-petroleum coke-water slur ries(CPCWS )are complex fluids.It has been known that the 1 H-NMR can provide the quantitative i nformation on the hydrophobic property of carbonaceous solid and on the microstructure and dynamics behavi or about water in the slurry.In this p aper,1 H-NMR has been used to study the microstructure of water and their dynamics.Two relationships have b een attained,that the chemical shif ts 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 petroleu m coke(PC).The fraction of bound water can be ob tained by a formula drawn from these two relationships.The spin-lattice relaxation time T 1 of the PC-water slurry is 42times lon ger than that of the coal-water slurry.T he tendency of change of T 1 with the increase of the coal content has been discussed.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2002年第8期710-715,共6页
Acta Physico-Chimica Sinica
基金
中国石油化工股份有限公司401039)资助项目
