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首页> 外文期刊>International Journal of Heat and Mass Transfer >Investigation on thermal characteristics of novel composite sorbent with carbon coated iron as additive
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Investigation on thermal characteristics of novel composite sorbent with carbon coated iron as additive

机译：以碳包铁为添加剂的新型复合吸附剂的热特性研究

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Carbon coated iron and expanded natural graphite are selected as the additives in developing novel consolidated composite strontium chloride, which is attempted to improve heat and mass transfer performance. Due to anisotropic characteristics, both disk and plate samples are investigated which are parallel and perpendicular to compression direction respectively. It is worth noting that thermal conductivity of composite sorbent increases with the increase of density and the decrease of mass ratio whereas permeability shows a reverse trend. Results demonstrate that the highest thermal conductivity of composite strontium chloride with carbon coated iron could reach 2.95 W m−1 K−1, which is improved by 14 times when compared with granular salt. Permeability of composite sorbent ranges from 1.2 × 10−9 m2to 4.5 × 10−14 m2when density is in the range between 400 kg m−3and 600 kg m−3. Sorption characteristic of composite sorbent with carbon coated iron is also investigated and compared with that not adding carbon coated iron. Under the condition of −10 °C evaporation temperature, sorption reaction rate of composite sorbent with carbon coated iron is better than that without carbon coated iron due to the improved mass transfer performance. Sorption rates of composite sorbents are almost the same when evaporation temperature reaches 10 °C.
机译：在开发新型固结复合氯化锶中，选择了涂碳铁和膨胀天然石墨作为添加剂，以提高传热和传质性能。由于各向异性的特性，研究了分别平行于压缩方向和垂直于压缩方向的圆盘和平板样品。值得注意的是，复合吸附剂的导热系数随密度的增加和质量比的降低而增加，而渗透率则呈现相反的趋势。结果表明，含碳包覆铁的复合氯化锶的最高导热系数可达2.95 W m-1−K-1，与颗粒盐相比提高了14倍。当密度在400 kg m-3至600 kg m-3之间时，复合吸附剂的渗透率范围为1.2×10-9-9 m2至4.5×10-14 m2。还研究了碳包铁复合吸附剂的吸附特性，并与未添加碳包铁的吸附特性进行了比较。在-10 C的蒸发温度条件下，由于提高了传质性能，碳包铁复合吸附剂的吸附反应速率要好于无碳包铁。当蒸发温度达到10 C时，复合吸附剂的吸附率几乎相同。

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