在连续流管式反应器中,以H_2O_2为氧化剂,在温度480～550℃、压力32～38MPa及H_2O_2过量100％～270％的条件下,用超临界水氧化(Supercritical water oxidation,简称SCWO)对含对氨基苯酚的模拟废水进行了实验研究。结果表明,采用SCWO法...在连续流管式反应器中,以H_2O_2为氧化剂,在温度480～550℃、压力32～38MPa及H_2O_2过量100％～270％的条件下,用超临界水氧化(Supercritical water oxidation,简称SCWO)对含对氨基苯酚的模拟废水进行了实验研究。结果表明,采用SCWO法能有效去除废水中的含氮有机物对氨基苯酚。升高温度、升高压力和延长停留时间使COD去除率显著提高。在550℃,38MPa,H_2O_2过量190％和停留时间229s时,COD去除率高达98.5％。在此条件下,SCWO总动力学对COD是2.13级,反应的活化能为29.3kJ/mol。展开更多
A ternary solid complex Lu(Et2dtc)3(phen) has been obtained from the reaction of hydrated lutetium chloride with sodium diethyldithiocarbamate (NaEt2dtc), and 1,10-phenanthroline (o-phen·H2O) in absolute ethanol....A ternary solid complex Lu(Et2dtc)3(phen) has been obtained from the reaction of hydrated lutetium chloride with sodium diethyldithiocarbamate (NaEt2dtc), and 1,10-phenanthroline (o-phen·H2O) in absolute ethanol. IR spectrum of the complex indicates that Lu3+ binds with sulfur atom in the Na(Et2dtc)3 and nitrogen atom in the o-phen. The enthalpy change of liquid-phase reaction of formation of the complex, △CHM- (l), was determined to be (-32.821 ± 0.147 ) kJ·mol-1 at 298.15 K by an RD-496 Ⅲ type heat conduction microcalormeter. The enthalpy change of the solid-phase reaction of formation of the complex, △CHM- (s), was calculated to be (104.160 ± 0.168) kJ · mol-1 on the basis of an appropriate thermochemistry cycle. The thermodynamics of liquid-phase reaction of formation of the complex was investigated by changing the temperature of liquid-phase reaction. Fundamental parameters, such as the activation enthalpy (△HM-), the activation entropy (?驻SM-), the activation free energy (△GM-), the apparent reaction rate constant (k), the apparent activation energy (E), the pre-exponential constant (A) and the reaction order (n), were obtained by combination the reaction thermodynamic and kinetic equations with the data of thermokinetic experiments. The molar heat capacity of the complex, cm, was determined to be (82.23 ± 1.47) J·mol-1·K-1 by the same microcalormeter. The constant-volume combustion energy of the complex, ΔcU, was determined as (-17 898.228 ± 8.59) kJ·mol-1 by an RBC-Ⅱtype rotating-bomb calorimeter at 298.15 K. Its standard enthalpy of combustion, △CHM-, and standard enthalpy of formation, △CHM-, were calculated to be (-17 917.43 ± 8.11) kJ·mol-1 and (-859.95 ±10.12) kJ·mol-1, respectively.展开更多
文摘在连续流管式反应器中,以H_2O_2为氧化剂,在温度480～550℃、压力32～38MPa及H_2O_2过量100％～270％的条件下,用超临界水氧化(Supercritical water oxidation,简称SCWO)对含对氨基苯酚的模拟废水进行了实验研究。结果表明,采用SCWO法能有效去除废水中的含氮有机物对氨基苯酚。升高温度、升高压力和延长停留时间使COD去除率显著提高。在550℃,38MPa,H_2O_2过量190％和停留时间229s时,COD去除率高达98.5％。在此条件下,SCWO总动力学对COD是2.13级,反应的活化能为29.3kJ/mol。
文摘A ternary solid complex Lu(Et2dtc)3(phen) has been obtained from the reaction of hydrated lutetium chloride with sodium diethyldithiocarbamate (NaEt2dtc), and 1,10-phenanthroline (o-phen·H2O) in absolute ethanol. IR spectrum of the complex indicates that Lu3+ binds with sulfur atom in the Na(Et2dtc)3 and nitrogen atom in the o-phen. The enthalpy change of liquid-phase reaction of formation of the complex, △CHM- (l), was determined to be (-32.821 ± 0.147 ) kJ·mol-1 at 298.15 K by an RD-496 Ⅲ type heat conduction microcalormeter. The enthalpy change of the solid-phase reaction of formation of the complex, △CHM- (s), was calculated to be (104.160 ± 0.168) kJ · mol-1 on the basis of an appropriate thermochemistry cycle. The thermodynamics of liquid-phase reaction of formation of the complex was investigated by changing the temperature of liquid-phase reaction. Fundamental parameters, such as the activation enthalpy (△HM-), the activation entropy (?驻SM-), the activation free energy (△GM-), the apparent reaction rate constant (k), the apparent activation energy (E), the pre-exponential constant (A) and the reaction order (n), were obtained by combination the reaction thermodynamic and kinetic equations with the data of thermokinetic experiments. The molar heat capacity of the complex, cm, was determined to be (82.23 ± 1.47) J·mol-1·K-1 by the same microcalormeter. The constant-volume combustion energy of the complex, ΔcU, was determined as (-17 898.228 ± 8.59) kJ·mol-1 by an RBC-Ⅱtype rotating-bomb calorimeter at 298.15 K. Its standard enthalpy of combustion, △CHM-, and standard enthalpy of formation, △CHM-, were calculated to be (-17 917.43 ± 8.11) kJ·mol-1 and (-859.95 ±10.12) kJ·mol-1, respectively.
