超临界水的物理化学性质  

Physicochemical properties of supercritical water

作　　者：杨馗[1] 徐明仙[2] 林春绵[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310032 [2]杭州职业技术学院,浙江杭州310002

出　　处：《浙江工业大学学报》2001年第4期386-390,共5页Journal of Zhejiang University of Technology

摘　　要：在超临界区 ,水的各种物理化学性质 (如氢键、密度、粘度、热导率、扩散系数、介电常数和溶解度等 )相比常温、常压下有很大的变化。同时超临界水的这些性质可以通过改变温度和压力而连续地改变。超临界水能与非极性物质完全互溶 ,也能与空气、O2 、CO2 、N2 等完全互溶 ,但无机物特别是无机盐在超临界水中的溶解度很低。In the critical region, the physical-chemical properties of water undergo marked changes. For example, the hydrogen bonding, density, viscosity, thermal conductivity, diffusion coefficient, dielectric constant and solubility of water are altered. The most thermodynamic and electrostatic properties of supercritical water (SCW) vary with increasing temperature and pressure. Non-polar substances, air, O-2, CO-2 and N-2 that are sparingly soluble in water at standard temperature and pressure conditions are miscible with SCW. On the other hand, the solubility of inorganic compound sharply decreases in SCW.

关 键 词：超临界水 物理化学性质 热力学 动力学 静电性质 

分 类 号：O613.3[理学—无机化学] O611.3[理学—化学]