Influence of the Heating Rate on the Activation of Coal and Lignite Oxidation by Copper Nitrate Full article
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Coke and Chemistry
ISSN: 1068-364X , E-ISSN: 1934-8398 |
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| Output data | Year: 2020, Volume: 63, Number: 8, Pages: 357-362 Pages count : 6 DOI: 10.3103/S1068364X20080037 | ||||||
| Tags | activated oxidation; coal; copper nitrate; heating rate; lignite; mass-spectrometric analysis; thermogravimetric analysis | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Council for Grants of the President of the Russian Federation | НШ-2513.2020.8 |
| 2 | Ministry of Science and Higher Education of the Russian Federation | 075-00268-20-02 (0718-2020-0040)(АААА-А20-120070890064-3) |
Abstract:
Adding copper nitrate Cu(NO3)2 is known to activate the oxidation of coal and lignite. In the present work, the change in its activating properties with increase in the heating rate is studied. The Cu(NO3)2 is first dissolved in a 50/50 (by volume) mixture of ethyl alcohol and water. Then it is applied to the fuel by steeping, to a content of 5 wt %. Activated oxidation is studied by thermal analysis, with different heating rates (2.5, 10, 20, and 40°C/min) in the temperature range 25–1000°C, at atmospheric pressure. With increase in heating rate, the catalytic effect of the additive is intensified: the initial (30–115°C) and final (85–180°C) oxidation temperatures fall, with increase in the maximum reaction rate. Mass-spectrometric analysis of the gaseous oxidation products shows that, in the presence of copper nitrate, increase in the heating rate leads to greater CO2 emission, with shorter oxidation time. The dependence of the activation energy on the degree of fuel conversion is determined by the Friedman method. The decrease in the mean activation energy when using Cu(NO3)2 is ~14 kJ/mol for lignite and ~35 kJ/mol for coal. © 2020, Allerton Press, Inc.
Cite:
Larionov K.B.
, Mishakov I.V.
, Zenkov A.V.
, Slyusarskiy K.V.
, Gromov A.A.
Influence of the Heating Rate on the Activation of Coal and Lignite Oxidation by Copper Nitrate
Coke and Chemistry. 2020. V.63. N8. P.357-362. DOI: 10.3103/S1068364X20080037 WOS Scopus РИНЦ OpenAlex
Influence of the Heating Rate on the Activation of Coal and Lignite Oxidation by Copper Nitrate
Coke and Chemistry. 2020. V.63. N8. P.357-362. DOI: 10.3103/S1068364X20080037 WOS Scopus РИНЦ OpenAlex
Original:
Ларионов К.Б.
, Мишаков И.В.
, Зенков А.В.
, Слюсарский К.В.
, Громов А.А.
Интенсификация процесса окисления бурого и каменного углей активирующей добавкой нитрата меди при изменении скорости нагрева
Кокс и химия. 2020. №8. С.2-9. RSCI РИНЦ
Интенсификация процесса окисления бурого и каменного углей активирующей добавкой нитрата меди при изменении скорости нагрева
Кокс и химия. 2020. №8. С.2-9. RSCI РИНЦ
Dates:
| Submitted: | Apr 8, 2020 |
| Accepted: | Jun 13, 2020 |
| Published print: | Aug 1, 2020 |
| Published online: | Nov 27, 2020 |
Identifiers:
| Web of science: | WOS:000593458300001 |
| Scopus: | 2-s2.0-85096926291 |
| Elibrary: | 45117781 |
| OpenAlex: | W3107207434 |