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Investigation of low-temperature regeneration of activated carbon

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Abstract

Granular activated carbon loaded with aniline,o-nitroaniline oro-nitrophenol, regenerated at relatively low temperature (450° in N2 atmosphere), shows losses of cyclic adsorption performances (about 5 % per cycle) comparable to those occurring with standard thermal regeneration (950° in controlled atmosphere). Adsorbate build-ups and related surface modifications have been determined.

Résumé

Le charbon actif en granulés, chargé d'aniline, d'o-nitroaniline et d'o-nitrophénol, régénéré à une température relativement faible (450° dans une atmosphère d'azote) montre des pertes de rendement d'adsorption cyclique (environ 5 p.c. par cycle) comparables à celles qui ont lieu lors de la régénération thermique standard (950° en atmosphère contrôlée). On a déterminé la constitution des adsorbats et les modifications relatives de surface.

Zusammenfassung

Mit Anilin,o-Nitroanilin undo-Nitrophenol beladene, bei relativ niedriger Temperatur (450° in N2-Atmosphäre) regenerierte granulierte Aktivkohle, zeigt zyklische Verluste der Adsorptionsleistung (etwa 5 % je Zyklus), welche mit den bei thermischer Standard-Regenerierung (950° in gesteuerter Atmosphäre) vorkommenden vergleichbar sind. Der Aufbau der Adsorbate und die damit verbundenen Oberflächenänderungen wurden bestimmt.

Резюме

Гранулированный акт ивированный уголь, наполненный анализо м, о-нитроанилином, и σ-нитрофенолом был р егенерирован при отн осительно низкой температуре − 450° в атмосфере азота. Установлено, что при э том потери циклических адсорбц ионных характеристик (около 5% за один цикл) были анал огичны полученным со станда ртной термической регенер ацией − 950° в контролир уемой атмосфере. Определен ы встроенные молекулы адсорбата и поверхно стные модификации.

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Work supported by IRSA-CNR, contract no. 77.01823.11.

Thanks are due to Mr. L. Pace for skilful contribution to the experimental work.

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Amicarelli, V., Baldassarre, G. & Liberti, L. Investigation of low-temperature regeneration of activated carbon. Journal of Thermal Analysis 18, 155–160 (1980). https://doi.org/10.1007/BF01909463

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  • DOI: https://doi.org/10.1007/BF01909463

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