Light-induced gasification of the coal-processing waste: Possible products and regimes

• Published in: Fuel (Guildford) Vol. 212; pp. 347 - 352
• Main Authors: Zaitsev, Alexandr S., Egorov, Roman I., Strizhak, Pavel A.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15-01-2018; Elsevier BV
• Subjects: Coal gasification; Coal-water slurry; Flammability; Gases; Gasification; Laser; Laser processing; Lasers; Light effects; Light-induced fuel gasification; Slurries; Sulfur dioxide; Syngas; Synthesis gas; Synthetic fuels; Waste-derived fuel; Coal-water slurry; Light-induced fuel gasification; Waste-derived fuel; Laser; Syngas
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2017.10.058

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•The main features of light induced gasification of waste were observed.•The gasification energy was estimated for two types of fuels (<6 MJ/kg).•The syngas contains the methane or hydrogen depending of external conditions.•The fuel temperature does not exceed the 370 K at the gasification.•The wettability of the coal defines the efficiency of the laser pyrolysis.
The laser processing becomes more and more popular for different objects and purposes including different fuels and combustibles. We have investigated experimentally some details of the light-induced conversion of the waste-derived coal-water slurry into the syngas. The process was “cold” enough (the temperature of the fuel was less than 350 K). The specific gasification energy strongly depends on the chosen content of the raw fuel and does not exceed the 6 MJ/kg. It was shown that there are two possible alternative processes with dominant production of the hydrogen or methane. The production of the combustible gases is accompanied with generation of certain amounts of SO2 and much less amount of CO.