A new deacid refined method of distillate oil, microwave irradiation, was put forward. The optimum conditions of the refined process are investigated. The volume ratio of solvent to oil is ((0.20～0.25)∶1), the press...A new deacid refined method of distillate oil, microwave irradiation, was put forward. The optimum conditions of the refined process are investigated. The volume ratio of solvent to oil is ((0.20～0.25)∶1), the pressure is0.04?MPa～0.06?MPa, the radiant time is 6?min under the constant pressure, microwave power is 375?W, settled for 25?min the acidity will be reduced from 170.4?mg/100?mL to 8.35?mg/100?mL, which is good enough to meet the best specification of GB, and the refined process has no effect on the quality of the distillate oil. The oil used in this study is common cut 2 distillate from Liaohe oil field. The recovery ratio can reach 99.3%.展开更多
The study focuses on the absorption rates of NO2, SO2 and a mixture of these two acid gases into urea solution in packed bed column. The absorption rate was studied as a function of absorbent temperature, urea concent...The study focuses on the absorption rates of NO2, SO2 and a mixture of these two acid gases into urea solution in packed bed column. The absorption rate was studied as a function of absorbent temperature, urea concentration and acid gas concentration. The influence of liquid temperature between 10 - 40?C, urea concentration between 0.1 - 0.5 M and acid gas concentration NO2 between 100 - 1000 ppm (191 - 1910 mg/m3), SO2 between 500 - 2500 ppm (1310 - 6530 mg/m3) were investigated. The mass gas flow rate of 20.646 (kg/m2.min) at 25?C and the absorption rate were determined by measuring the NO2 and SO2 concentrations in the inlet and outlet streams of the absorptioncolumn. The absorption rate of SO2 increases with the decrease of temperature of absorbent (urea solution) and with the increase of the urea concentration. The presence of NO2 in the effluent gas stream lowers the absorption rate of SO2 in urea solution due to the fast reaction of NO2 with urea as compared with SO2. The absorption rate of NO2 decreases as the urea concentration exceeds 0.4 mol/l and for NO2 gas concentration of 100 ppm due to the decrease the diffusivity of the gas. The experimental data were analyzed using dimensionless analysis to find the correlation of mass transfer coefficient in the packed column Sh (H / dp)1.2 = 4.19*10–2 *(G' dp / μg)0.87 (μg / ρg DAB)0.60 The results confirmed the hypothesis that the absorption is accompanied with chemical reaction. Also it is found the increasing the temperature of absorbent solution the absorption rate of two gases is decreases. The mass transfer coefficient models are in good agreements with the Kramer’s equation.展开更多
文摘A new deacid refined method of distillate oil, microwave irradiation, was put forward. The optimum conditions of the refined process are investigated. The volume ratio of solvent to oil is ((0.20～0.25)∶1), the pressure is0.04?MPa～0.06?MPa, the radiant time is 6?min under the constant pressure, microwave power is 375?W, settled for 25?min the acidity will be reduced from 170.4?mg/100?mL to 8.35?mg/100?mL, which is good enough to meet the best specification of GB, and the refined process has no effect on the quality of the distillate oil. The oil used in this study is common cut 2 distillate from Liaohe oil field. The recovery ratio can reach 99.3%.
文摘The study focuses on the absorption rates of NO2, SO2 and a mixture of these two acid gases into urea solution in packed bed column. The absorption rate was studied as a function of absorbent temperature, urea concentration and acid gas concentration. The influence of liquid temperature between 10 - 40?C, urea concentration between 0.1 - 0.5 M and acid gas concentration NO2 between 100 - 1000 ppm (191 - 1910 mg/m3), SO2 between 500 - 2500 ppm (1310 - 6530 mg/m3) were investigated. The mass gas flow rate of 20.646 (kg/m2.min) at 25?C and the absorption rate were determined by measuring the NO2 and SO2 concentrations in the inlet and outlet streams of the absorptioncolumn. The absorption rate of SO2 increases with the decrease of temperature of absorbent (urea solution) and with the increase of the urea concentration. The presence of NO2 in the effluent gas stream lowers the absorption rate of SO2 in urea solution due to the fast reaction of NO2 with urea as compared with SO2. The absorption rate of NO2 decreases as the urea concentration exceeds 0.4 mol/l and for NO2 gas concentration of 100 ppm due to the decrease the diffusivity of the gas. The experimental data were analyzed using dimensionless analysis to find the correlation of mass transfer coefficient in the packed column Sh (H / dp)1.2 = 4.19*10–2 *(G' dp / μg)0.87 (μg / ρg DAB)0.60 The results confirmed the hypothesis that the absorption is accompanied with chemical reaction. Also it is found the increasing the temperature of absorbent solution the absorption rate of two gases is decreases. The mass transfer coefficient models are in good agreements with the Kramer’s equation.
