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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.

Synteza nanorurek węglowych do zastosowań medycznych

Szymański Ł., Kołaciński Z., Wiak S., Raniszewski G., Lefik M., Gryska E.

Zeszyty Naukowe. Elektryka / Politechnika Łódzka

2015

z. 126

219--226

W artykule opisano termiczne metody otrzymywania nanorurek węglowych z gazu i w obecności katalizatora zawierającego cząsteczki żelaza. Umożliwi to ich zastosowanie w leczeniu chorób, w tym również raka. Cząsteczki takie wprowadzone do organizmu i odpowiednio zaadresowane, mogą być rozgrzane za pomocą pola o częstotliwości radiowej, a ich połączenie z chorymi komórkami umożliwi ich niszczenie. W badaniach użyto pola elektromagnetycznego o częstotliwości 13.56 MHz, które to jest często wykorzystywane w medycynie.

The article describe thermal methods of carbon nanotubes synthesis from gases containing carbon compounds and catalysts containing iron particles. This allows their application in the treatment of diseases including cancer. Those CNTs are introduced into the human body and functionalized to cancer cells recognition. Then they can be heated by radio frequency field. Their connection to the degenerated cells allows cells destruction. In the study the most common frequency for medical applications was used. RF field influence at 13.56 MHz was examined and described.