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Toward a continuous synthesis of porous carbon xerogel beads
AIChE Journal ( IF 3.7 ) Pub Date : 2018-01-04 , DOI: 10.1002/aic.16056
David Eskenazi 1 , Patrick Kreit 1 , Jean-Paul Pirard 1 , Nathalie Job 1 , Philippe Compère 2
Affiliation  

A continuous process for producing porous carbon xerogel beads has been developed. It consists in injecting a pre‐cured aqueous solution of resorcinol and formaldehyde on top of a column filled with hot oleic acid. The latter is pumped on the top of the column and fed at the bottom, generating an upward flow that can be adjusted to match the terminal velocity of the settling beads. Thus, the bead residence time in the column can be adjusted to match the gelation time, allowing the beads to solidify before reaching the bottom of the vessel. The obtained beads are subsequently dried and pyrolyzed. The developed experimental setup proved the continuous synthesis of porous carbon beads is possible. Nevertheless, the shaping process caused various texture changes of the porous carbon, which mainly yields macropores instead of micro and mesopores. This process also leads to the build‐up of a denser skin around the beads. © 2018 American Institute of Chemical Engineers AIChE J, 64: 1049–1058, 2018

中文翻译:

致力于多孔碳干凝胶珠的连续合成

已经开发了生产多孔碳干凝胶珠的连续方法。它包括在充满热油酸的色谱柱顶部注入间苯二酚和甲醛的预固化水溶液。后者被泵送到塔的顶部,并在塔的底部进料,产生向上的流量,该流量可以调节以匹配沉降珠的最终速度。因此,可以调节珠在柱中的停留时间以匹配胶凝时间,从而允许珠在到达容器底部之前固化。随后将获得的珠粒干燥并热解。发达的实验装置证明了多孔碳珠的连续合成是可能的。然而,成形过程引起了多孔碳的各种纹理变化,其主要产生大孔而不是微孔和中孔。此过程还导致在珠子周围形成更致密的皮肤。©2018美国化学工程师学会AIChE J,64:1049-1058,2018
更新日期:2018-01-04
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