Research of thermal destruction dynamics of coal particles in oxidizing medium with copper nitrate

Ларионов, К. Б.; Mishakov, Ilya V.; Gromov, Alexander A.

doi:10.1088/1742-6596/1128/1/012070

Cited by 3 publications

(1 citation statement)

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“…Presumably, this was caused by an improvement in the efficiency of the oxygen diffusion inside the porous space of the sample due to the appearance of new channels and cracks in its structure, which could be formed due to the decomposition of the activating additives within the pores of fuel particles. It was earlier found [38] that the introduction of copper-salt additives (for example, Cu(NO 3 ) 2 ) speeds up the volatile matter release due to the significant morphological change occurred on the particles' surface.…”

Section: Combustion Characteristics Of the Fuel Samplesmentioning

confidence: 99%

Effect of Cu(NO3)2 and Cu(CH3COO)2 Activating Additives on Combustion Characteristics of Anthracite and Its Semi-Coke

et al. 2020

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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.

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Section: Combustion Characteristics Of the Fuel Samplesmentioning

confidence: 99%