焦水煤浆流变性及其核磁共振研究

Study of Rheological Properties of PCCWS and the Application of NMR to PCCWS

利用风化煤、大港石油焦制备成浆体燃料PCCWS ,考察了浆体的流变性质并利用HNMR考察了PCCWS中水质子的动态行为。结果表明 :随着浆体浓度的增大 ,屈服应力值和粘度均表现为增加 ;浆体中水质子的化学位移移向低场 ,自旋—晶格弛豫时间T1值则减小。

A kind of slurry fuel, i.e.PCCWS, based on windblown coal and Dagang petroleum coke, was prepared. The rheological properties of PCCWS were investigated and the active behavior of water in it was observed by NMR. The results showed that the yield stress and viscosity increased with increasing solid content. It was also indicated that the chemical shift of proton moved to lower field and the spin_lattice relaxation time T 1 increased with the increasing solid content. The relative amount and activity of the bound water and free water in PCCWS markedly affected its NMR properties.