Gasification of RDF and Its Components with Tire Pyrolysis Char as Tar-Cracking Catalyst

Patrik Šuhaj, Jakub Husár and Juma Haydary
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Patrik Šuhaj: Institute of Chemical and Environmental Engineering, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia
Jakub Husár: Institute of Chemical and Environmental Engineering, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia
Juma Haydary: Institute of Chemical and Environmental Engineering, Slovak University of Technology in Bratislava, Radlinského 9, 81237 Bratislava, Slovakia

Sustainability, 2020, vol. 12, issue 16, 1-14

Abstract: 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 CO 2 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 CO 2 content, a negative synergic effect (higher CO 2 concentration) was observed.

Keywords: RDF gasification; RDF components; catalytic gasification; char catalyst (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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