共查询到16条相似文献,搜索用时 78 毫秒
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氢气和一氧化碳在混二甲苯中的溶解度 总被引:3,自引:0,他引:3
在1立升的高压机械搅拌釜中,采用气体间歇吸收技术,在80-160℃,0.5-5MPa的范围内,测定了氢气和一化碳在混二甲苯中的溶解度。氢气和一氧化碳的溶解度随着温度和压力的增加而增大,且在相同的温度和压力下,一氧化碳的淀粉 度大于氢气的溶解度。与它们在间二甲苯中的溶解度相比,在混二甲苯中的溶解度是较小的。此外,使用正规溶液理论的Prausnitz-Shair方法对它们的溶解度进行了估算。可以看出,一氧化碳在二甲苯中的溶解度的估算值与实验结果较相符,氢气由地临界温度较低,没有合适的估算式,故用实验回归的公式结合Prausnitz-Shair方法中的其它公式进行估算,估算值与实验值大体相符。 相似文献
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高压搅拌釜中H,CO在不同液体介质中的溶解度和体积传质… 总被引:10,自引:1,他引:9
使用高压搅拌釜,应用气体间歇吸收技术,在温度373-573K,压力1.0-4.0MPA,转速800r/min的实验条件下,测定了H2,CO在液体石蜡,正二十八烷烃和FT300蜡中的溶妥度和体积传质系数。 相似文献
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高压搅拌釜中H_2、CO在不同液体介质中的溶解度和体积传质系数的研究 总被引:15,自引:0,他引:15
使用高压搅拌釜,应用气体间歇吸收技术,在温度373~573K、压力1.0~4.0MPa,转速800r/min的实验条件下,测定了H_2、CO在液体石蜡,正二十八烷烃和FT300蜡中的溶解度和体积传质系数。实验结果表明H_2、CO在3种液体介质中的溶解度和体积传质系数均随温度和压力的升高而增加,随液体介质分子量增加而减少。同时获得了溶解度随温度变化的关联式和气体在液体中的溶解热数据。 相似文献
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基于等容吸收降压原理,在314.15~517.15K、0.05~0.4MPa、搅拌转速800r?min?1条件下,在机械搅拌高压釜中,测定了二甲醚在液体石蜡中的溶解度和体积传质系数。结果表明二甲醚的溶解度随着压力的升高而增大,随温度的升高而减小。溶解度与压力的关系曲线为通过原点的直线,符合亨利定律。回归出了二甲醚的溶解度系数Hi与温度T的关联式,溶解度的计算值与实验值的相对误差小于5.0%。二甲醚的体积传质系数随温度和压力的升高而增大。 相似文献
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浓度对传质系数的影响及多元物系传质 总被引:4,自引:1,他引:3
在筛板塔中对甲醇-乙醇-水三元物系进行精馏传质过程实验,考虑浓度对传质系数的影响建立了一个数学模型,对各组分在塔中的浓度分布进行模拟计算,计算结果能正确反映各组分在塔中浓度分布的变化规律.实验与计算结果都表明在某些浓度范围内乙醇呈现出比较复杂的变化规律. 相似文献
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Ahmad Rahbar Kelishami Mohamad Ali Mousavian 《Chemical Engineering Communications》2013,200(8):1041-1062
Developments in the area of packed columns, particularly structured packed columns, are ongoing, specifically in the area of liquid-liquid extractions. Accurate predictions of mass transfer coefficients lead to more accurate design of columns. In the present study, mass transfer coefficients were measured experimentally for packed columns of different heights to study the effect of packing height and specific area. Two experimental pilot regular packed extraction columns were examined using toluene/acetic acid/water and n-butyl acetate/acetic acid/water systems. Based on the results, a novel model for prediction of effective diffusivity has been proposed that is a function of column height and specific area. The mass transfer coefficients obtained by this prediction were compared with other models. The results of this new model are in good agreement with the experimental data. Therefore, this new model can be used to design better regular packed columns. 相似文献
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Naoki Dohi Takanori Takahashi Kimio Minekawa Yoshinori Kawase 《Chemical Engineering Communications》2006,193(6):689-701
Gas dispersion with large-scale impellers consisting of modified large paddle impellers in stirred tanks, with rather large ratios of both impeller diameter and impeller height to tank diameter, was experimentally examined in transition and turbulent mixing ranges. Gas holdups and volumetric gas-liquid mass transfer coefficients with large-scale impellers, i.e., Maxblend and Fullzone impellers, were measured in 0.31 and 0.6 m I.D. stirred tanks, and the gas dispersion performance of large-scale impellers was compared with that of double conventional small-scale high-speed impeller systems, i.e., double four-flat blade disk turbine impellers and double four-flat paddle impellers.
The gas holdups of the large-scale impellers were comparable with those of the small-scale impeller systems at a given rotational speed. The volumetric gas-liquid mass transfer coefficients for large-scale impellers were also similar to those of the small-scale impeller systems. It was found that the large-scale impellers are not more energy efficient than the small-scale impellers in obtaining good gas dispersion.
Empirical correlations for gas holdups and volumetric gas-liquid mass transfer coefficients were developed. They fit the experimental data in transition and turbulent mixing ranges reasonably well, with correlation factors greater than 0.84. 相似文献
The gas holdups of the large-scale impellers were comparable with those of the small-scale impeller systems at a given rotational speed. The volumetric gas-liquid mass transfer coefficients for large-scale impellers were also similar to those of the small-scale impeller systems. It was found that the large-scale impellers are not more energy efficient than the small-scale impellers in obtaining good gas dispersion.
Empirical correlations for gas holdups and volumetric gas-liquid mass transfer coefficients were developed. They fit the experimental data in transition and turbulent mixing ranges reasonably well, with correlation factors greater than 0.84. 相似文献