Sorption of Acetaldehyde and Hexanal in Trace Concentrations on Carbon‐Based Adsorbents

Abstract

Adsorption processes are frequently applied to separate traces of hazardous and toxic substances from gas streams. Hence, knowledge of sorption characteristics of these substances on standard adsorbents is essential. Sorption of hexanal and acetaldehyde from a nitrogen gas stream in trace concentrations on activated carbon and ordered mesoporous carbon-based adsorbents (CMK) is studied. A magnetic suspension balance and an attached gaschromatograph-mass spectrometer were used to analyze the sorption process both gravimetrically and spectrometrically. Both types of adsorbents show a higher capacity for hexanal than acetaldehyde. The activated carbon exhibits considerable differences in regard to desorption of hexanal compared to the mesoporous CMK.

Adsorption and Desorption of Isoflurane on Carbonaceous Adsorbents and Zeolites at Low Concentrations in Gas Phase

“…Desorption from micropores as mainly in case of MHSC and C40/4 Extra proceeds more slowly because of slow diffusion in the narrow channels. Additionally, the bottleneck effect may prevent a quick desorption of isoflurane from mesopores included by microporous structures. , …”