Abstract

The thermal transformation of coal and lignite in the presence of Cu(NO₃)₂ activator (5 wt %) is investigated as a function of the atmospheric composition. The copper nitrate is supported on to the samples by the incipient wetness with Cu(NO₃)₂ solution in water and alcohol. The effect of the activator is studied as a function of the gas (air/argon) composition, by thermogravimetric analysis with heating at 10°C/min in the range 25–800°C, at atmospheric pressure. With change in gas composition, the activity of Cu(NO₃)₂ changes. Specifically, the thermal transformation is shifted to lower temperature: Δt = 33°C for lignite and 70°C for coal. With increase in oxidant (air) content in the gas, the activity of the added Cu(NO₃)₂ increases: that is, Δt increases. By mass spectrometry, the gaseous oxidation products of the coal are analyzed. The upper temperature limits on the peaks of nitrogen-oxide (NO_x) liberation are determined as a function of the gas composition.

中文翻译：

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Cu（NO 3）2活化剂和气体组成对煤和褐煤热分解的影响

摘要

研究了在存在Cu（NO ₃）₂活化剂（5 wt％）的情况下煤和褐煤的热转化与大气成分的关系。硝酸铜通过在水和酒精中的Cu（NO ₃）₂溶液初期润湿而负载在样品上。通过热重分析，在大气压下以10°C / min的速度在25–800°C范围内加热，研究活​​化剂的作用与气体（空气/氩气）组成的关系。随着气体成分的变化，Cu（NO ₃）₂的活性变化。具体而言，热转变移至较低温度：Δt褐煤= 33°C，煤= 70°C。随着气体中氧化剂（空气）含量的增加，所添加的Cu（NO ₃）₂的活性增加：即，Δt增加。通过质谱分析煤的气态氧化产物。确定氮氧化物（NO _x）释放峰的温度上限取决于气体成分。