Abstract

We report the results of a study of pyrolysis of pelletized coal grade 2B samples in argon under the action of laser pulses (1064 nm, 14 ns, 6 Hz, 0.2–0.5 J/cm²). The result of laser irradiation of coal samples is their ablation and the formation of H₂, CH₄, CO, CO₂, and C₂H₂ gaseous products. The dependence of the yield of the resulting gaseous products on the energy density of laser pulses is described within the framework of a model of a chain mechanism for the development of laser-initiated thermochemical reactions. The ablated mass of samples increases linearly with increasing radiation energy density when the threshold value is exceeded, H > 0.2 J/cm².

中文翻译：

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钕激光器纳秒一次谐波脉冲作用下褐煤微粒的热解

摘要

^{我们报告了在激光脉冲（1064 nm，14 ns，6 Hz，0.2–0.5 J/cm 2}）作用下，2B 级粒煤样品在氩气中热解的研究结果。激光照射煤样的结果是它们被烧蚀并形成H ₂、CH ₄、CO、CO ₂和C ₂ H ₂气态产物。在激光引发的热化学反应的链机制模型的框架内描述了所得气态产物的产率对激光脉冲能量密度的依赖性。当超过阈值H > 0.2 J/cm ²时，样品的烧蚀质量随着辐射能量密度的增加而线性增加。