LAPSE:2023.27566
Published Article
LAPSE:2023.27566
Effect of Cu(NO3)2 and Cu(CH3COO)2 Activating Additives on Combustion Characteristics of Anthracite and Its Semi-Coke
April 4, 2023
Abstract
The process of anthracite and its semi-coke combustion in the presence of 5 wt.% (in terms of dry salt) additives of copper salts Cu(NO3)2 and Cu(CH3COO)2 was studied. The activating additives were introduced by an incipient wetness procedure. The ignition and combustion parameters for coal samples were examined in the combustion chamber at the heating medium temperatures (Tg) of 600−800 °C. The composition of the gaseous combustion products was controlled using an on-line gas analyzer. The fuel modification with copper salts was found to reduce the ignition delay time on average, along with a drop in the minimum ignition temperature Tmin by 138−277 °C. With an increase in Tg temperature, a significant reduction in the ignition delay time for the anthracite and semi-coke samples (by a factor of 6.7) was observed. The maximum difference in the ignition delay time between the original and modified samples of anthracite (ΔTi = 5.5 s) and semi-coke (ΔTi = 5.4 s) was recorded at a Tg temperature of 600 °C in the case of Cu(CH3COO)2. The emergence of micro-explosions was detected at an early stage of combustion via high-speed video imaging for samples modified by copper acetate. According to the on-line gas analysis data, the addition of copper salts permits one to reduce the volume of CO formed by 40% on average, providing complete oxidation of the fuel to CO2. It was shown that the introduction of additives promoted the reduction in the NOx emissions during the combustion of the anthracite and semi-coke samples.
The process of anthracite and its semi-coke combustion in the presence of 5 wt.% (in terms of dry salt) additives of copper salts Cu(NO3)2 and Cu(CH3COO)2 was studied. The activating additives were introduced by an incipient wetness procedure. The ignition and combustion parameters for coal samples were examined in the combustion chamber at the heating medium temperatures (Tg) of 600−800 °C. The composition of the gaseous combustion products was controlled using an on-line gas analyzer. The fuel modification with copper salts was found to reduce the ignition delay time on average, along with a drop in the minimum ignition temperature Tmin by 138−277 °C. With an increase in Tg temperature, a significant reduction in the ignition delay time for the anthracite and semi-coke samples (by a factor of 6.7) was observed. The maximum difference in the ignition delay time between the original and modified samples of anthracite (ΔTi = 5.5 s) and semi-coke (ΔTi = 5.4 s) was recorded at a Tg temperature of 600 °C in the case of Cu(CH3COO)2. The emergence of micro-explosions was detected at an early stage of combustion via high-speed video imaging for samples modified by copper acetate. According to the on-line gas analysis data, the addition of copper salts permits one to reduce the volume of CO formed by 40% on average, providing complete oxidation of the fuel to CO2. It was shown that the introduction of additives promoted the reduction in the NOx emissions during the combustion of the anthracite and semi-coke samples.
Record ID
Keywords
activating additive, anthracite, combustion, copper acetate, copper nitrate, ignition, semi-coke
Subject
Suggested Citation
Larionov K, Slyusarskiy K, Tsibulskiy S, Tolokolnikov A, Mishakov I, Bauman Y, Vedyagin A, Gromov A. Effect of Cu(NO3)2 and Cu(CH3COO)2 Activating Additives on Combustion Characteristics of Anthracite and Its Semi-Coke. (2023). LAPSE:2023.27566
Author Affiliations
Larionov K: School of Energy & Power Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia; Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia
Slyusarskiy K: School of Energy & Power Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia; Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia
Tsibulskiy S: School of Energy & Power Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia [ORCID]
Tolokolnikov A: School of Energy & Power Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
Mishakov I: Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia; Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk,
Bauman Y: Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia; Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, [ORCID]
Vedyagin A: Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia; Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, [ORCID]
Gromov A: Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia [ORCID]
Slyusarskiy K: School of Energy & Power Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia; Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia
Tsibulskiy S: School of Energy & Power Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia [ORCID]
Tolokolnikov A: School of Energy & Power Engineering, National Research Tomsk Polytechnic University, 634050 Tomsk, Russia
Mishakov I: Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia; Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk,
Bauman Y: Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia; Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, [ORCID]
Vedyagin A: Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia; Department of Materials Science and Functional Materials, Boreskov Institute of Catalysis SB RAS, 630090 Novosibirsk, [ORCID]
Gromov A: Laboratory of Catalysis and Processing of Hydrocarbons, National University of Science and Technology “MISIS”, 119049 Moscow, Russia [ORCID]
Journal Name
Energies
Volume
13
Issue
22
Article Number
E5926
Year
2020
Publication Date
2020-11-13
ISSN
1996-1073
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PII: en13225926, Publication Type: Journal Article
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LAPSE:2023.27566
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