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2 Polish Journal of Chemical Technology

2 2021

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Fe-modified activated carbon obtained from biomass as a catalyst for α-pinene autoxidation

Kamińska Adrianna, Maciejewska Nikola, Miądlicki Piotr, Kiełbasa Karolina, Sreńscek-Nazzal Joanna, Michalkiewicz Beata

Polish Journal of Chemical Technology

2021

Vol. 23, nr 2

73--80

The presented work describes the autoxidation of alpha-pinene for the first time using a catalyst based on activated carbon from biomass with introduced Fe. The raw material for the preparation of the carbon material was waste orange peel, which was activated with a KOH solution. The following instrumental methods characterized the obtained catalyst (Fe/O_AC):N2 adsorption at 77 K, XRD, UV, SEM, TEM, X-ray microanalysis, and catalytic studies. It was shown that the Fe/O_AC catalyst was very active in the autoxidation of alpha-pinene. The main reaction products were: alpha-pinene oxide, verbenone, verbenol, and campholenic aldehyde.

Commercial Kevlar derived activated carbons for CO2 and C2H4 sorption

Kaliszewski M., Zgrzebnicki M., Kałamaga A., Pinjara S., Wróbel R. J.

Polish Journal of Chemical Technology

2021

Vol. 23, nr 2

81--87

The carbonaceous precursor was obtained via pyrolysis of commercial aramid polymer (Kevlar). Additionally the precursor was activated at 1000°C in CO2 atmosphere for different times. Obtained materials were characterised by BET; XPS; SEM and optical microscopy. The sorption capacities were determined by temperature swing adsorption performed in TGA apparatus for CO2 and C2H4 gases. The obtained materials exhibit high difference in sorption of these gases i.e. 1.5 and 2.8 mmol/g @30°C respectively and high SSA ~1600 m2/g what can be applied in separation applications. The highest uptakes were 1.8 and 3.1 mmol/g @30°C respectively. It was found that the presence of oxygen and nitrogen functional groups enhances C2H4/CO2 uptake ratio.