Recovered carbon black from tires as carbon carrier in metal oxide catalytic systems

• Published in: South African journal of chemical engineering Vol. 49; pp. 64 - 72
• Main Authors: Krasnovskikh, Marina, Mokrushin, Ivan, Novoselov, Konstantin, Kulikova, Yuliya, Toderaş, Monica, Bassyouni, Mohamed, Babich, Olga
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2024; Elsevier
• Subjects: Carbon-metal oxide catalytic systems; End-of-life tires; Pyrolysis; Recovered carbon black; Pyrolysis; Carbon-metal oxide catalytic systems; Recovered carbon black; End-of-life tires
• ISSN: 1026-9185
• DOI: 10.1016/j.sajce.2024.03.017

•Using carbon black from waste tires for catalyst production has positive result.•Metals/carbon black catalysts decrease the energy of activation by 13 %.•Tri-metallic catalysts provide the best decomposition interval narrowing. Pyrolysis is one of the most common methods of end-of-life tires (ELTs) recycling. This study considered the use of carbon black from pyrolysis of ELTs as a carbon carrier for metals (Co, Ni, Cu, Fe) and their oxides to produce catalytic systems. The synchronous thermal analysis showed the positive effect of metal oxides/recovered carbon black (MOs/rCB) on ammonium perchlorate thermolysis. It was selected as a model catalytic reaction. Metal oxides/recovered carbon black (MOs/rCB) catalysts facilitated a reduction in the thermal decomposition phases of ammonium perchlorate, resulting in a significant narrowing of the decomposition interval. The greatest narrowing (22.7 °C) was observed at 103.5 °C for non-catalytic process. All tri-metallic catalytic systems showed high catalytic efficiency, providing a narrowing of the decomposition interval on average 2.5 times more in comparison with mono-metallic catalysts. Trioxide catalyst CuO/CoO/FeO/rCB showed the most significant shift in the high-temperature decomposition stage by 13% (from 334.0 °C to 293.2 °C). The activity of di-, tri-, and tetra-metallic catalytic systems was further enhanced by the synergistic effect induced by the addition of a second (or more) metal to the system. Efficient use of rCB for impregnated catalyst systems production could improve the economic efficiency of ELTs pyrolysis.