{"title":"Investigation of the Sorption Activity of Native Coals to Atmospheric Oxygen","authors":"Yu. F. Patrakov, S. A. Semenova, A. V. Yarkova","doi":"10.3103/S0361521924700101","DOIUrl":null,"url":null,"abstract":"<p>The influence of a gas atmosphere during sample preparation, granulometric composition, the duration of contact with air, and the stage of metamorphism on the sorption of oxygen by coals from the atmosphere was established. It was shown that sample preparation performed in an atmosphere of air led to the primary oxidation of the outer surface of coals, which introduced an error in the subsequent determination of the rate of oxygen sorption. Fine coal fractions (0–0.2 mm) with a more developed outer surface exhibited increased oxygen absorption activity. The rate of oxygen sorption was maximal at the initial moment of the interaction of native coals with air, and it decreased with the duration of contact. The least metamorphosed hard coals of the D brand with a high concentration of reactive functional groups and a developed porous structure were characterized by the greatest chemisorption activity.</p>","PeriodicalId":779,"journal":{"name":"Solid Fuel Chemistry","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid Fuel Chemistry","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.3103/S0361521924700101","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
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Abstract
The influence of a gas atmosphere during sample preparation, granulometric composition, the duration of contact with air, and the stage of metamorphism on the sorption of oxygen by coals from the atmosphere was established. It was shown that sample preparation performed in an atmosphere of air led to the primary oxidation of the outer surface of coals, which introduced an error in the subsequent determination of the rate of oxygen sorption. Fine coal fractions (0–0.2 mm) with a more developed outer surface exhibited increased oxygen absorption activity. The rate of oxygen sorption was maximal at the initial moment of the interaction of native coals with air, and it decreased with the duration of contact. The least metamorphosed hard coals of the D brand with a high concentration of reactive functional groups and a developed porous structure were characterized by the greatest chemisorption activity.
研究确定了样品制备过程中的气体环境、粒度组成、与空气接触的时间以及变质阶段对煤炭从大气中吸附氧气的影响。结果表明，在空气环境中进行的样品制备会导致煤的外表面发生初级氧化，从而给随后的氧气吸附率测定带来误差。外表面更发达的细煤（0-0.2 毫米）表现出更高的吸氧活性。在原生煤与空气作用的初始时刻，氧气吸附率最大，随着接触时间的延长，吸附率下降。变质程度最低的 D 牌硬煤具有高浓度的活性官能团和发达的多孔结构，其化学吸附活性最高。
期刊介绍：
The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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