B. P. Aduev, V. D. Volkov, Ya. V. Kraft, N. V. Nelyubina
{"title":"Laser Pyrolysis of Lignite with Different Mineral Compositions","authors":"B. P. Aduev, V. D. Volkov, Ya. V. Kraft, N. V. Nelyubina","doi":"10.3103/S1068364X24601045","DOIUrl":null,"url":null,"abstract":"<div><p>The pyrolysis of lignite microparticles (0.5–63.0 μm) in tablet form (ρ = 1 g/cm<sup>3</sup>) under the action of pulsed periodic laser radiation (1064 nm, 14 ns, 6 Hz, 0.2–0.5 J/cm<sup>2</sup>) is studied, for samples with different ash content (<i>A</i> = 10.1 and 0.5%). The laser pulses produce ablation of the samples: coal particles (10–50 μm) are emitted, and carbon atoms evaporate from the surface. Laser radiation absorbed in the surface layer triggers thermochemical reactions that develop by a chain mechanism. The gaseous products H<sub>2</sub>, CH<sub>4</sub>, C<sub>2</sub>H<sub>2</sub>, CO, and CO<sub>2</sub> are produced in both types of samples. The yield and generation rate of the synthesis gas (H<sub>2</sub> and CO) increase with ash content of the samples. This indicates that mineral impurities have a catalytic effect on the gasification of lignite in laser pyrolysis.</p></div>","PeriodicalId":519,"journal":{"name":"Coke and Chemistry","volume":"67 11","pages":"634 - 642"},"PeriodicalIF":0.4000,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Coke and Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.3103/S1068364X24601045","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The pyrolysis of lignite microparticles (0.5–63.0 μm) in tablet form (ρ = 1 g/cm3) under the action of pulsed periodic laser radiation (1064 nm, 14 ns, 6 Hz, 0.2–0.5 J/cm2) is studied, for samples with different ash content (A = 10.1 and 0.5%). The laser pulses produce ablation of the samples: coal particles (10–50 μm) are emitted, and carbon atoms evaporate from the surface. Laser radiation absorbed in the surface layer triggers thermochemical reactions that develop by a chain mechanism. The gaseous products H2, CH4, C2H2, CO, and CO2 are produced in both types of samples. The yield and generation rate of the synthesis gas (H2 and CO) increase with ash content of the samples. This indicates that mineral impurities have a catalytic effect on the gasification of lignite in laser pyrolysis.
期刊介绍：
The journal publishes scientific developments and applications in the field of coal beneficiation and preparation for coking, coking processes, design of coking ovens and equipment, by-product recovery, automation of technological processes, ecology and economics. It also presents indispensable information on the scientific events devoted to thermal rectification, use of smokeless coal as an energy source, and manufacture of different liquid and solid chemical products.
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