摘要
采用连续式超临界反应器,考察温度对于无机盐在超临界水中的溶解度影响。结果表明,随着温度的升高,无机盐的溶解度逐渐降低;在相同温度下,氯盐的溶解度随阳离子离子半径及电荷数的增大而减小,即NaCl>KCl>CaCl_2,硫酸盐的溶解度也呈现同一规律,即Na_2SO_4>K_2SO_4>CaSO_4;在相同温度下,阳离子相同,盐的溶解度随阴离子离子半径和电荷数的增大而减小,即NaCl>Na_2SO_4,KCl>K_2SO_4,CaCl_2>CaSO_4;当温度从380℃升至400℃时,无机盐溶解度下降趋势最快,NaCl、KCl和CaCl_2的溶解度区间分别为:213.72×10^(-6)~165.24×10^(-6),185.81×10^(-6)~143.64×10^(-6),80.23×10^(-6)~7.26×10^(-6),Na_2SO_4、K_2SO_4和CaSO_4的溶解度区间分别为:85.72×10^(-6)~14.36×10^(-6),60.24×10^(-6)~5.12×10^(-6),0.048×10^(-6)~0.012×10^(-6)。
The solubility of inorganic salts was researched by using continuous supercritical reactor,the impact of temperature on the solubility was investigated.The results showed that:With the increase of temperature,the solubility of inorganic salts was reduced;At the same temperature,with the increase of cation ion radius and the number of charge,the solubility of chlorine salts are decreased:NaCl>KCl>CaCl 2,and the solubility of sulfates also show the same law:Na 2SO 4>K 2SO 4>CaSO 4;At the same temperature,the inorganic salts have the same anion,with the increase of anion ion radius and the number of charge,the solubility of salts are reduced:NaCl>Na 2SO 4,KCl>K 2SO 4,CaCl 2>CaSO 4;When the temperature from 380℃to 400℃,the decline of the solubility of inorganic salts is fastest,the interval of the solubility of NaCl,KCl and CaCl 2:213.72×10-6~165.24×10-6,185.81×10-6~143.64×10-6,80.23×10-6~7.26×10-6,and the interval of the solubility of Na 2SO 4,K 2SO 4 and CaSO 4:85.72×10-6~14.36×10-6,60.24×10-6~5.12×10-6,0.048×10-6~0.012×10-6.
作者
闫正文
廖传华
廖玮
朱跃钊
YAN Zheng-wen;LIAO Chuan-hua;LIAO Wei;ZHU Yue-zhao(College of Machinery and Power Engineering,Nanjing University of Technology,Nanjing 210009,China)
出处
《应用化工》
CAS
CSCD
北大核心
2018年第3期514-516,共3页
Applied Chemical Industry
基金
江苏省环保科研项目(2012031)
江苏省工业支撑计划(BE2013127)
关键词
超临界水氧化
温度
无机盐
溶解度
supercritical water oxidation
temperature
inorganic salts
solubility
