Intensification of bituminous coal and lignite oxidation by copper-based activating additives
Abstract The oxidation of lignite and bituminous coal samples modified by 5 wt% (in terms of dry salt) addition of copper salts Cu(NO3)2, CuSO4, and Cu(CH3COO)2 was studied. The samples’ reactivity was studied by thermogravimetry within a temperature range of 45–600 °C at a heating rate of 2.5 °C/mi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-07-01
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| Series: | International Journal of Coal Science & Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40789-020-00350-z |
| _version_ | 1819139909891391488 |
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| author | K.B. Larionov I.V. Mishakov K.V. Slyusarskiy A.A. Vedyagin |
| author_facet | K.B. Larionov I.V. Mishakov K.V. Slyusarskiy A.A. Vedyagin |
| author_sort | K.B. Larionov |
| collection | DOAJ |
| description | Abstract The oxidation of lignite and bituminous coal samples modified by 5 wt% (in terms of dry salt) addition of copper salts Cu(NO3)2, CuSO4, and Cu(CH3COO)2 was studied. The samples’ reactivity was studied by thermogravimetry within a temperature range of 45–600 °C at a heating rate of 2.5 °C/min in an oxidizing environment. The introduction of activating additives has resulted in a significant decrease in the temperature of intense oxidation onset (ΔT i = 20/94 °C), in a reduction in the sample residence time in the volatile matter release region (Δt e = 2/22 min) and the total duration of the coal combustible mass oxidation (Δt f = 8/14 min). The Friedman method was used to calculate the activation energy values for the oxidation process of the modified samples. The maximum change in activation energy values was observed for the bituminous coal sample. The possible mechanism behind the action of the copper-salt additives, which activate the oxidation of lignite and bituminous coal, is discussed. According to the data of mass spectrometric analysis, the concentration of NO x in the reaction products decreases as the temperature of the activated oxidation process is shifted towards the low-temperature region. |
| first_indexed | 2024-12-22T11:30:09Z |
| format | Article |
| id | doaj.art-247ebdf7493d426390c23b62bd0e31ca |
| institution | Directory Open Access Journal |
| issn | 2095-8293 2198-7823 |
| language | English |
| last_indexed | 2024-12-22T11:30:09Z |
| publishDate | 2020-07-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Coal Science & Technology |
| spelling | doaj.art-247ebdf7493d426390c23b62bd0e31ca2022-12-21T18:27:37ZengSpringerOpenInternational Journal of Coal Science & Technology2095-82932198-78232020-07-018114115310.1007/s40789-020-00350-zIntensification of bituminous coal and lignite oxidation by copper-based activating additivesK.B. Larionov0I.V. Mishakov1K.V. Slyusarskiy2A.A. Vedyagin3National Research Tomsk Polytechnic UniversityBoreskov Institute of Catalysis SB RASNational Research Tomsk Polytechnic UniversityNational Research Tomsk Polytechnic UniversityAbstract The oxidation of lignite and bituminous coal samples modified by 5 wt% (in terms of dry salt) addition of copper salts Cu(NO3)2, CuSO4, and Cu(CH3COO)2 was studied. The samples’ reactivity was studied by thermogravimetry within a temperature range of 45–600 °C at a heating rate of 2.5 °C/min in an oxidizing environment. The introduction of activating additives has resulted in a significant decrease in the temperature of intense oxidation onset (ΔT i = 20/94 °C), in a reduction in the sample residence time in the volatile matter release region (Δt e = 2/22 min) and the total duration of the coal combustible mass oxidation (Δt f = 8/14 min). The Friedman method was used to calculate the activation energy values for the oxidation process of the modified samples. The maximum change in activation energy values was observed for the bituminous coal sample. The possible mechanism behind the action of the copper-salt additives, which activate the oxidation of lignite and bituminous coal, is discussed. According to the data of mass spectrometric analysis, the concentration of NO x in the reaction products decreases as the temperature of the activated oxidation process is shifted towards the low-temperature region.https://doi.org/10.1007/s40789-020-00350-zCoalActivated oxidationCopper nitrateCopper sulfateCopper acetateThermo-gravimetric and mass spectrometry analysis |
| spellingShingle | K.B. Larionov I.V. Mishakov K.V. Slyusarskiy A.A. Vedyagin Intensification of bituminous coal and lignite oxidation by copper-based activating additives International Journal of Coal Science & Technology Coal Activated oxidation Copper nitrate Copper sulfate Copper acetate Thermo-gravimetric and mass spectrometry analysis |
| title | Intensification of bituminous coal and lignite oxidation by copper-based activating additives |
| title_full | Intensification of bituminous coal and lignite oxidation by copper-based activating additives |
| title_fullStr | Intensification of bituminous coal and lignite oxidation by copper-based activating additives |
| title_full_unstemmed | Intensification of bituminous coal and lignite oxidation by copper-based activating additives |
| title_short | Intensification of bituminous coal and lignite oxidation by copper-based activating additives |
| title_sort | intensification of bituminous coal and lignite oxidation by copper based activating additives |
| topic | Coal Activated oxidation Copper nitrate Copper sulfate Copper acetate Thermo-gravimetric and mass spectrometry analysis |
| url | https://doi.org/10.1007/s40789-020-00350-z |
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