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Jakub Husár
Institute of Chemical and Environmental Engineering, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia

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Journal article
Published: 17 August 2020 in Sustainability
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The composition of gas produced by the gasification of refuse-derived fuel (RDF) can be affected by the content of individual components of RDF and their mutual interactions. In this work, plastics, paper, wood, textile and RDF were gasified in a two-stage gasification system and the obtained tar yields and product gas quality were compared. The two-stage reactor consisted of an air-blown gasifier and a catalytic reactor filled with carbonized tire pyrolysis char as the tar-cracking catalyst. Tire pyrolysis char is a promising alternative to expensive catalysts. The impact of temperature and catalyst amount on the tar yield and gas composition was investigated. Theoretical oxygen demand for all material classes was calculated and its effect on gas composition and tar yield is discussed. The results indicate that the gasification of plastics produces the highest amount of tar and hydrocarbon gases, while the CO2 content of the product gas remains the lowest compared to all other materials. On the other hand, the paper fraction produced hydrogen-rich gas with low tar content. The gasification of RDF at 700 °C provided the lowest tar yield compared to all other materials, indicating positive synergic effects of lignocellulosic biomass and plastics in tar reduction. The significance of these interactions was suppressed at the highest temperature of 900 °C, as the thermal cracking of tar became dominant. For CO2 content, a negative synergic effect (higher CO2 concentration) was observed.

ACS Style

Patrik Šuhaj; Jakub Husár; Juma Haydary. Gasification of RDF and Its Components with Tire Pyrolysis Char as Tar-Cracking Catalyst. Sustainability 2020, 12, 6647 .

AMA Style

Patrik Šuhaj, Jakub Husár, Juma Haydary. Gasification of RDF and Its Components with Tire Pyrolysis Char as Tar-Cracking Catalyst. Sustainability. 2020; 12 (16):6647.

Chicago/Turabian Style

Patrik Šuhaj; Jakub Husár; Juma Haydary. 2020. "Gasification of RDF and Its Components with Tire Pyrolysis Char as Tar-Cracking Catalyst." Sustainability 12, no. 16: 6647.

Journal article
Published: 27 October 2019 in Catalysts
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Municipal solid waste constitutes one of the major challenges and concerns of our society. Disposal of waste material is potentially dangerous, harming both environment and mankind. In order to diminish negative effects of municipal solid waste, its thermal decomposition to valuable chemicals has been studied. The principal draw-back of thermal processes used for solid waste utilization as raw material is tar formation. In this study, low-cost catalysts of different origin were tested in the decomposition of a model component of tar originating from waste material pyrolysis/gasification. p-Xylene was selected as the model compound found in biomass decomposition products. Its decomposition was carried out in the presence of either tire pyrolysis char- or clay minerals-based catalysts. Tar-cracking activities of both catalyst types at varying experimental conditions were compared and related to the catalysts physical-chemical properties. In experiments, either empty reactor or reactor filled with 10 g of the catalyst was used; p-xylene mass flow was set to 2.58 g h−1 (50 μL min−1, room temperature), and decomposition temperature ranging from 750 °C to 850 °C was applied. Moreover, evolution of the output variables, p-xylene conversion and hydrogen content in the gas phase, with the reaction time was investigated. Catalysts’ properties were assessed based on nitrogen adsorption isotherms, thermogravimetric and elemental composition analyses. Amounts and composition of p-xylene catalytic decomposition products were evaluated using GC analysis of both gaseous phase and condensable products. Results showed the superiority of tire pyrolysis char catalyst over that based on clay minerals.

ACS Style

Pavol Steltenpohl; Jakub Husár; Patrik Šuhaj; Juma Haydary. Performance of Catalysts of Different Nature in Model Tar Component Decomposition. Catalysts 2019, 9, 894 .

AMA Style

Pavol Steltenpohl, Jakub Husár, Patrik Šuhaj, Juma Haydary. Performance of Catalysts of Different Nature in Model Tar Component Decomposition. Catalysts. 2019; 9 (11):894.

Chicago/Turabian Style

Pavol Steltenpohl; Jakub Husár; Patrik Šuhaj; Juma Haydary. 2019. "Performance of Catalysts of Different Nature in Model Tar Component Decomposition." Catalysts 9, no. 11: 894.