What question did this study set out to answer?

The aim is to analyze how demineralisation affects the ignition properties of brown coal using laser pulses.

April 19, 2026

Effect of Demineralisation on the Ignition of Brown Coal by Millisecond Laser Pulses

Key Points

The aim is to analyze how demineralisation affects the ignition properties of brown coal using laser pulses.
Investigated ignition of brown coal samples with 1-10 ms laser pulses.
Used a quasi-continuous ytterbium laser YLR-150/1500-QCW-MM-AC at 1070 nm and 1.6 kW.
Compared energy requirements for ignition before and after demineralisation.
Demineralisation increases the energy density needed for ignition.
There is a measurable difference in ignition thresholds before and after demineralisation.

Abstract

Laser ignition of brown coal samples (rank 2B, Kaychaksky open pit) with rectangular 1-10 ms pulses of the quasi-continuous ytterbium laser YLR-150/1500-QCW-MM-AC (1070 nm, 1.6 kW) has been investigated before and after coal demineralisation. Coal demineralisation is demonstrated to cause an increase in the energy density necessary for ignition.

Effect of Demineralisation on the Ignition of Brown Coal by Millisecond Laser Pulses

Key Points

Abstract

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