Carbon Gel Monoliths with Introduced Straight Microchannels for Phenol Adsorption
Carbon Gel Monoliths with Introduced Straight Microchannels for Phenol Adsorption
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引入直微通道的碳凝胶整体用于苯酚吸附
DOI：
10.1007/s10450-018-00007-z
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发表时间：
2019
期刊：
影响因子：
3.3
通讯作者：
Isao Ogino and Shin R Mukai
中科院分区：
文献类型：
--
作者：
Kazuya Takahashi;Seiichiro Yoshida;Kasama Urkasame;Shinichiroh Iwamura;Isao Ogino and Shin R Mukai
使用颗粒填充床形式的碳吸附剂吸附苯酚固有地遭受低水力阻力和短扩散路径长度之间的不相容性。在这项工作中，使用聚酯纤维作为模板，成功合成了由间苯二酚-甲醛凝胶制成的碳凝胶整体，其中引入了60-160 µm范围内的直微通道。这种合成方法的优点是通道尺寸和通道密度都可以独立调节。引入的微通道是有效的，在最大限度地减少通过样品的流体的压降小于百分之一的床填充有具有相同的扩散路径长度的颗粒。合成的整料还具有足够的机械强度（每个整料超过12 kg）以被活化以增加其吸附能力。连续流动体系中苯酚的吸附实验表明，合成的整体材料可作为苯酚的有效吸附剂。所提出的合成方法的可调通道尺寸和通道密度具有用于合成可用于满足各种工艺要求的整体材料的潜力。
Adsorption of phenol using carbon adsorbents in the form of a packed bed of particles inherently suffers from the incompatibility between low hydraulic resistance and short diffusion path length. In this work, carbon gel monoliths made from resorcinol–formaldehyde gels with introduced straight microchannels in the range of 60–160 µm were successfully synthesized using polyesters fibers as templates. The advantage of this synthesis method is that both channel size and channel density can be tuned independently. Introduced microchannels were effective in minimizing the pressure drop of a fluid flowing through the sample to less than a hundredth of beds packed with particles having the same diffusion path length. Synthesized monoliths also possess sufficient mechanical strength (more than 12 kg per monolith) to be activated to increase their adsorption capacity. Adsorption experiments of phenol in a continuous flow system show that synthesized monoliths can be used as effective adsorbents for phenol removal. The tunable channel size and channel density of the proposed synthesis method has the potential for the synthesis of monoliths which could be used to fulfill various process demands.