摘要
本文采用气体间歇物理吸收技术，在一立升的表面进气式高压机械搅拌釜中，在温度（３７３～５７３Ｋ）、气体压力（１～４ＭＰａ）和混合速度（１３．３Ｈｚ）的实验条件下，测定了Ｈ２、ＣＯ在液体石蜡、正二十八烷烃、ＦＴ３００蜡中的体积传质系数（ｋＬａ），实验中发现：两种气体在三种液体介质中的体积传质系数均随温度的升高而增加，随气体分压的增加而增加。在同一种液体介质中，Ｈ２和ＣＯ的体积传质系数具有相同的数量级。两种气体的体积传质系数随液体分子量的增加而降低。并对Ｈ２液体石蜡体系，考察了不同的混合速度（６．７～２０．０Ｈｚ）、液体体积和固体颗粒浓度（０～１５Ｗ％）对气体的体积传质系数的影响，实验结果表明：氢气的体积传质系数随混合速度的增加而增加，随液体体积的增加而降低，在颗粒浓度较低的情况下，氢气的体积传质系数高于不含颗粒时的ｋＬａ值，但当颗粒浓度进一步增加时，体积传质系数呈下降趋势。
The effects of operating variables on the mass transfer coefficients (k La) for H 2 and CO in nparaffin, noctacosane and FT300wax were measured at various gas partial pressures (1 0～4 0MPa) and temperatures (373～573K), and mixing speed (13 3Hz) in a 1liter surfaceaerated agitated autoclave The k La data were determined using the transient physical gas absorption technique, the decline of system pressure as a function of time were recorded using an online computer and acquisition system The obtained data showed that k La values for all gasliquid systems studied increased with temperature and gas partial pressure, but decrease with molecular weight of liquid The values of k La for CO and H 2 are of the same order of magnitude The k La values of H 2 in nparaffin at various mixing speeds (6 7￣20 0Hz), liquid volumes and solid concentrations (0￣15W%) were also investigated The data showed that k La values increased with mixing speed and decreased with liquid volume at constant pressure and temperature The effect of solid concentration on mass transfer showed that k La values increased with particle loading at small solid concentrations and decreased dramatically with particle loading at large solid concentrations
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1997年第3期284-288,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金
关键词
机械搅拌釜
传质系数
搅拌釜
气体
高温
高压
agitated reactor, carbon monoxide, hydrogen, volumetric mass transfer coefficient
