Comparison of physical and chemical activation of tyre pyrolysis char
- Tomasz Piotr Kotkowski,
- Robert Cherbański,
- Eugeniusz Molga
Nowadays, the growth of the amount of end-of-life tyres (ELTs) is observed because of perpetual development of motorization. ELTs cannot be reused on vehicles anymore. Moreover, the storage of them on landfills is banned in Europe. One of the possible methods of the ELT recycling is pyrolysis, which gives the following products: gas, oil, char and steel. The char activation develops its porous structure. It is necessary to receive high – quality adsorbent. In this work, the physical and chemical activations of the char were carried out. Then, the samples were characterized and the results compared. For physical activation, a thermobalance TG 209 F1 Libra (Netzsch, Germany), equipped with a micro furnace and a precise ultra-microbalance, was used. On the basis of the experimental results, the optimal conditions (temperature and time) for this activation were found. Then, this process was carried out in an electric, horizontal laboratory furnace (Czylok, type PRW 55/1200M, Poland) to scale up the process. Also, the chemical activation of char with KOH as an activating agent was carried out in the same laboratory furnace. The physically and chemically activated chars, nonactivated char and activated carbon (reference material) were characterized using nitrogen adsorption at 77K. The isotherms were determined by using the 3Flex Surface Characterization Analyzer (Micromeritics, USA). On the basis of the isotherms the BET surface area and pore size distribution were calculated. In sum, the porous structure of the physically and chemically activated chars were compared. The results indicate that the BET surface area is higher for the chemically activated char. The largest BET surface area for physically activated char equals 256 m2/g while for chemically activated char it equals 669 m2/g. The samples are mostly microporous.
- Record ID
- Publication type
- Article number
- EYEC Monograph: 9th European Young Engineers Conference, 2021, Warszawa, Politechnika Warszawska, Wydział Inżynierii Chemicznej i Procesowej, 183 p., ISBN 978-83-936575-9-9
- Keywords in English
- end-of-life tyres, pyrolysis, physical activation, chemical activation
- eng (en) English
- Score (nominal)
- Uniform Resource Identifier
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