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Acetone adsorption on co2-activated tyre pyrolysis char – thermogravimetric analysis

Kotkowski T., Cherbański R., Molga E.

Chemical and Process Engineering

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2018

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Vol. 39, nr 2

233–246

EN

Activation of tyre pyrolysis char (TPC) can significantly increase its market value. To date, it has been frequently carried out in different reactors. In this work, thermogravimetric analysis was used instead. The performance of activated pyrolysis chars was tested by adsorption of acetone vapour and comparison of the equilibrium adsorption capacities for all samples. The highest equilibrium adsorption capacity was observed for the carbon burn-off of 60%. In addition, the equilibrium adsorption capacity of activated TPC decreases by about 10% after eleven adsorption/desorption cycles. Moreover, activation changed the porous structure of pyrolysis chars from mesoporous to micro-mesoporous.

2

Pyrolysis of waste tyres – The effect of reaction kinetics on the results of thermogravimetric analysis

Cherbański R., Molga E., Wróblewski K.

Chemical and Process Engineering

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2017

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Vol. 38, nr 3

363--377

EN

This paper presents a systematic thermogravimetric (TG) study on the kinetics of end-of-life tyre (ELT) pyrolysis. In the experimental part of this work, TG results are compared for tyre samples of different mass and size. This shows that the conduction resistance in the milligram scale (up to ~100 mg) tyre sample can be neglected. A comparison of experimental results demonstrates that the characteristic maxima on the DTG curve (the first derivative of TG signal) shift towards higher temperatures for higher heating rates. This phenomenon is explained to have kinetic origin and it is not caused by the internal heat transfer resistance. In the modelling part of this work, the kinetic parameters of the Three-Component Simulation Model (TCSM) are calculated and compared to the literature values. Testing of the kinetic model is carried out using experiments with a varying heating rate. This shows the limitation of the simplified kinetic approach and the appropriate selection method of the kinetic parameters.

3

Piroliza zużytych opon w aspekcie technicznym i ekonomicznym oraz uszlachetnianie otrzymywanych produktów

Olędzka E., Pyskło L., Sobczak M., Łuksa A.

Polimery

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2006

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T. 51, nr 6

407-414

PL

Na podstawie literatury (72 poz.) uzasadniono konieczność rozwiązania nabrzmiewającego w skali światowej problemu ciągłego gromadzenia się odpadów gumowych, w szczególności zużytych opon samochodowych. Przedstawiono sposoby ich odzysku i recyklingu oraz uwarunkowania legislacyjno-ekonomiczne w tej dziedzinie. Omówiono dotychczasowe metody pirolizy zużytych opon z uwzględnieniem różnych technik prowadzenia tego procesu (próżniowa, w układzie gaz-ciało stałe oraz w układzie ciecz-ciało stałe) wraz z charakterystyką uzyskiwanych produktów oraz możliwości ich wykorzystywania. Wspomniano też o nowych kierunkach badań nad omawianym zagadnieniem [piroliza plazmowa, piroliza wobec katalizatorów (zeolitów)]. Dokonano szacunkowej oceny opłacalności niektórych technologicznych rozwiązań pirolizy, przedstawiając przy tym światowe firmy produkujące instalacje do jej prowadzenia, z uwzględnieniem różnych konstrukcyjnych rozwiązań pieców pirolitycznych.

EN

On the basis of literature review (72 references) the necessity to solve the world problem of growing amounts of rubber wastes, especially end-of-life tyres (Table 1), has been justified. The methods of their recovery and recycling as well as legislative and economical conditions in this area (Table 2) were presented. Past methods of used tyres' pyrolysis were discussed. Various techniques of the process (vacuum one, in gas-solid or liquid-solid systems) were presented with the characteristics of the products obtained and their possible applications (Table 3). The new trends in the investigations [plasma pyrolysis, pyrolysis in the presence of the catalysts (zeolites)] were also mentioned. Profitability assessments of selected technological solutions of pyrolysis have been done. Global companies producing the pyrolysis plants as well as various constructional solutions of pyrolytic furnaces were presented.