Hydrogen-rich gas as a product of two-stage co-gasification of lignite/waste plastics mixtures

Under atmospheric pressure, mixtures of lignite with waste plastics were gasified on a laboratory scale. The resulting tar was cracked in a thermal cracking reactor. For experiments, low-ash and low-sulfur lignite was used; the percentage of waste plastics in the mixtures was 10 and 20 wt.%. The mai...

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Bibliographic Details
Published in:International journal of hydrogen energy 2014-07, Vol.39 (21), p.10987-10995
Main Authors: Straka, Pavel, Bičáková, Olga
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Byproducts
Co-gasification
Energy
Exact sciences and technology
Fracture mechanics
Fuels
Hydrogen
Hydrogen-based energy
Hydrogen-rich gas
Lignite
Polymers
Reactors
Residues
Waste plastics
Wastes
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Summary:Under atmospheric pressure, mixtures of lignite with waste plastics were gasified on a laboratory scale. The resulting tar was cracked in a thermal cracking reactor. For experiments, low-ash and low-sulfur lignite was used; the percentage of waste plastics in the mixtures was 10 and 20 wt.%. The main product of co-gasification was hydrogen-rich gas, as by-products, soot and non-gasified solid residue were obtained. It was found that the higher heating value of obtained gas is fully comparable with that of industrial gas from lignite gasification. Probably, at least 20 wt.% of lignite can be replaced with mixed waste plastics in this process. The effect of waste plastics addition on properties of the obtained gas and of the non-gasified solid residue was evaluated and discussed. •Mixed waste plastics may be co-gasified with lignite to obtain hydrogen-rich gas.•At least 20 wt.% of lignite can be replaced with mixed waste plastics in the process.•Replacing does not have much effect on composition, properties and amount of gas obtained.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2014.05.054