Intensification of bituminous coal and lignite oxidation by copper-based activating additives
作者机构：National Research Tomsk Polytechnic UniversityTomskRussia634050 Boreskov Institute of Catalysis SB RASNovosibirskRussia630090
出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)
年 卷 期：2021年第8卷第1期
页 面：141-153页
核心收录：
学科分类：081901[工学-采矿工程] 0808[工学-电气工程] 0819[工学-矿业工程] 08[工学] 0818[工学-地质资源与地质工程] 0807[工学-动力工程及工程热物理] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程]
主 题：Coal Activated oxidation Copper nitrate Copper sulfate Copper acetate Thermo-gravimetric and mass spectrometry analysis
摘 要：The oxidation of lignite and bituminous coal samples modified by 5 wt%(in terms of dry salt)addition of copper salts Cu(NO_(3))_(2),CuSO_(4),and Cu(CH_(3)COO)_(2) was *** samples’reactivity was studied by thermogravimetry within a temperature range of 45–600℃ at a heating rate of 2.5℃/min in an oxidizing *** introduction of activating additives has resulted in a significant decrease in the temperature of intense oxidation onset(ΔT_(i)=20/94℃),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 *** maximum change in activation energy values was observed for the bituminous coal *** possible mechanism behind the action of the copper-salt additives,which activate the oxidation of lignite and bituminous coal,is *** to the data of mass spectrometric analysis,the concentration of NOx in the reaction products decreases as the temperature of the activated oxidation process is shifted towards the low-temperature region.
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