Abstract
Softwood fiber was heated at 200 to 500 °C to examine the effects of temperature and residence time on the oil and water adsorbencies of the fiber. The liquid adsorbency was significantly affected by the temperature. The oil sorption ability was almost constant at a temperature range of 200 to 350 °C. An additional increase in the temperature, however, resulted in a decrease in the oil sorption ability. On the other hand, a steady decrease in the water adsorbency was observed at rising temperature until 500 °C. At high temperatures (above 350 °C), reduced interstices between a number of fibers may cause the decreased sorption ability. No significant differences in the residence time were recognized.
Zusammenfassung
Nadelholzfasern wurden auf 200 bis 500 °C erhitzt, um den Einfluß der Temperatur und der Verweildauer auf die Adsorption von Öl und Wasser zu untersuchen. Die Adsorptionsfähigkeit für Flüssigkeiten wurde deutlich beeinflußt. Die Adsorption von Öl blieb zwischen 200 und 500 °C fast konstant. Eine weitere Steigerung der Temperatur führte zu einem Abfall der Adsorptionsfähigkeit. Bei Wasser wurde dagegen eine fortlaufende Verringerung der Adsorption mit steigender Temperatur beobachtet. Bei höherer Temperatur (>350 °C) verringern sich die Abstände zwischen den Fasern; dies wird für den Effekt verantwortlich gemacht. Die Verweildauer spielte keine erkennbare Rolle.
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Kato, Y., Umehara, K. & Aoyama, M. An oil sorbent from wood fiber by mild pyrolysis. Holz als Roh- und Werkstoff 55, 399–401 (1997). https://doi.org/10.1007/s001070050254
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DOI: https://doi.org/10.1007/s001070050254