Intensity dependent features of the light-induced gasification of the waste-derived coal-water compositions

Intensity dependent features of the light-induced gasification of the waste-derived coal-water compositions

Nowadays, the recovery of combustible industrial waste is a very popular approach to supply cheap fuel to various consumers. However, due to the physical and chemical properties of the waste, it requires special preparation to be used effectively. The main features of the direct light-induced conver...

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Bibliographic Details
Published in:Renewable energy Vol. 146; pp. 1667 - 1675
Main Authors: Egorov, Roman I., Zaitsev, Alexander S., Li, Hong, Gao, Xin, Strizhak, Pavel A.
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-02-2020
Subjects:
Laser
Light-induced gasification
Syngas
Waste recovery
waste-derived fuel
waste-derived fuel
Waste recovery
Light-induced gasification
Laser
Syngas
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Summary:Nowadays, the recovery of combustible industrial waste is a very popular approach to supply cheap fuel to various consumers. However, due to the physical and chemical properties of the waste, it requires special preparation to be used effectively. The main features of the direct light-induced conversion of waste-derived coal-water compositions to syngas were investigated. Unlike classical techniques, the proposed method involves solar light, which is a renewable energy source. The fundamental intensity thresholds were shown when fuel was gasified by nanosecond pulses (8J/cm2) and continuous wave laser light (700−800W/cm2). Such light flow parameters are fully achievable by solar radiation. The dependencies of syngas component concentrations on the light intensity were shown as well as similar dependencies for the conversion rate and specific conversion energy (∼3.5MJ/kg for optimal gasification conditions). [Display omitted] •The efficiency of the gasification versus the light intensity was measured.•An effective gasification requires CW light intensity above 700 W/cm2.•Gasification by nanoisecond pulses starts if pulse energy is above 8 J/cm2.•Nanosecond pulses produce the finely dispersed fuel together with syngas.•CO2 wasn't observed during the laser processing of the coal-water slurry.
ISSN:0960-1481
1879-0682
DOI:10.1016/j.renene.2019.07.146