Combustion of Bituminous Coal and Semicoke with Copper Salts
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Fuel Processing Technology
ISSN: 0378-3820
|
| Вых. Данные |
Год: 2021,
Том: 213,
Номер статьи
: 106706,
Страниц
: 11
DOI:
10.1016/j.fuproc.2020.106706
|
| Ключевые слова |
Bituminous coal; Semicoke; Ignition; Combustion; Activating additive; High-speed video recording |
| Авторы |
Larionov K.B.
1,2
,
Mishakov I.V.
2,3
,
Slyusarskiy K.V.
1,2
,
Tsibulskiy S.A.
1
,
Tabakaev R.B.
1
,
Bauman Yu.I.
2,3
,
Vedyagin A.A.
1,2,3
,
Nalivaiko A.Yu.
2
,
Gromov A.A.
2
|
| Организации |
| 1 |
National Research Tomsk Polytechnic University
|
| 2 |
National University of Science and Technology "MISIS"
|
| 3 |
Boreskov Institute of Catalysis SB RAS
|
|
Информация о финансировании (1)
|
1
|
Министерство науки и высшего образования Российской Федерации
|
075-00268-20-02 (0718-2020-0040)(АААА-А20-120070890064-3)
|
This paper examines combustion of coal and semicoke modified by 5 wt% of Cu(NO3)2, CuSO4 and Cu(CH3COO)2. The additives were introduced using the wet impregnation method. Ignition and combustion experiments were performed in a combustion chamber at temperatures of the heating medium varying from 500 °C to 700 °C. The gas-phase combustion products were analyzed using an in-line gas analyzer. It was found that, on average, the use of activating additives contributed to a reduction of the ignition delay time by 1.8 times and a decrease in the minimum ignition temperature by 54–135 °C. An increase in the heating medium temperature resulted in a significant ignition delay decrease (by ~270%). The maximum difference in the ignition delay time between the reference sample and the modified coal (3.4 s) and semicoke (10.4 s) samples was observed at 500°С while using copper nitrate. In the initial stage of combustion, formation of micro-explosions on the samples modified with copper nitrate and acetate was observed. The use of additives contributed to reducing the content of unburnt carbon in the fuel. Addition of copper salts resulted in a significant reduction in the CO production volume and better fuel oxidation to CO2.