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为克服复合吸附剂传热与传质性能协同强化的矛盾,本文以膨胀石墨、木粉和氯化钙为原料混合浸渍并固化,形成膨胀石墨为骨架的导热网络,基于氯化钙对木粉的活化造孔形成丰富孔隙的传质通道,获得导热传质良好的复合吸附剂制备工艺。利用正交试验法分析了钙墨比、木粉粒度、钙木比、炭化活化的温度和时间五因素不同水平对渗透特性的影响。结果表明,渗透率在钙木比和木粉粒度上均存在最优值,并随着钙墨比、炭化活化的温度和时间三因素的上升而增大,其中钙墨比对渗透率影响远大于其余因素。经过补充试验验证,最终所获最优样品渗透率达到5.67824×10~(-13)m~2,优化所得制备工艺为钙木比2,温度600℃,时间2.5 h,粒度目数140~150,钙墨比4。
In order to overcome the contradiction between synergistic enhancement of heat transfer and mass transfer properties of composite adsorbents, this paper uses expanded graphite, wood flour and calcium chloride as raw materials to mix and impregnate and solidify to form a thermal conductive network with expanded graphite as skeleton. Based on the effect of calcium chloride on wood flour The activation of pore-forming rich pore mass transfer channels to obtain a good heat and mass transfer composite adsorbent preparation process. The effects of calcium-ink ratio, wood flour particle size, calcium-to-wood ratio, temperature and time of carbonization activation on the infiltration characteristics were analyzed by orthogonal test. The results showed that the permeability had the best value in calcium-wood ratio and wood flour particle size, and increased with the increase of calcium-to-calcium ratio and the temperature and time of carbonization activation. The rest of the factors. After the supplementary test, the optimum permeability of the final sample reached 5.67824 × 10 ~ (-13) m ~ 2. The optimized preparation process was calcium-calcium ratio 2, temperature 600 ℃, time 2.5 h, particle size 140 ~ 150 , Calcium than 4.