Non-isothermal oxidation of coal with Ce(NO3)3 and Cu(NO3)2 additives
| Parent link: | International Journal of Coal Science and Technology Vol. 6, iss. 1.— 2019.— [P. 37-50] |
|---|---|
| Hlavní autor: | |
| Korporativní autor: | |
| Další autoři: | |
| Shrnutí: | Title screen Non-isothermal oxidation of brown coal with 5 wt% of Cu(NO3)2, 5 wt% of Ce(NO3)3 and {2.5 wt% Cu(NO3)2?+?2.5 wt% Ce(NO3)3} additives was studied. The introduction of additives was carried out by an incipient wet impregnation method to ensure uniform distribution of cerium and copper nitrates within the structure of coal powdery samples (according to SEM and EDX mapping). The samples reactivity was studied in an isothermal oxidation regime at 200 °C (1 h) and by DSC/TGA at 2.5 °C/min heating rate. The additives implementation was found to reduce significantly the oxidation onset temperature (?Ti?=?20–55 °C), the samples oxidation delay time (?ti?=?2–22 min) and overall duration of the oxidation process (?tc?=?8–16 min). The additives efficiency could be graded in accordance with the activation on the coal oxidation in the following row: Cu(NO3)2?>?{Cu(NO3)2?+?Ce(NO3)3}?>?Ce(NO3)3. According to the mass spectroscopy, the obtained row of activation correlates well with the initial temperature of the studied nitrate’s decomposition (from 190 to 223 °C). A presence of nitrates was found to change significantly the trend of heat release taking place during the oxidation of coal samples (according to DSC/TGA data). The influence of coal morphology and volatiles content in initial sample on the parameters of the oxidation process was studied as well. Activation energy (Ea) of the coal oxidation was calculated using Coats–Redfern method. Maximum decrease in Ea from 69 to 58 kJ/mol was observed for the samples with Cu(NO3)2. Режим доступа: по договору с организацией-держателем ресурса |
| Jazyk: | angličtina |
| Vydáno: |
2019
|
| Témata: | |
| On-line přístup: | https://doi.org/10.1007/s40789-018-0229-y |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=660574 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 660574 | ||
| 005 | 20250404104327.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\30098 | ||
| 090 | |a 660574 | ||
| 100 | |a 20190805d2019 k||y0rusy50 ba | ||
| 101 | 0 | |a eng | |
| 102 | |a US | ||
| 135 | |a drcn ---uucaa | ||
| 181 | 0 | |a i | |
| 182 | 0 | |a b | |
| 200 | 1 | |a Non-isothermal oxidation of coal with Ce(NO3)3 and Cu(NO3)2 additives |f K. B. Larionov, A. A. Gromov | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 55 tit.] | ||
| 330 | |a Non-isothermal oxidation of brown coal with 5 wt% of Cu(NO3)2, 5 wt% of Ce(NO3)3 and {2.5 wt% Cu(NO3)2?+?2.5 wt% Ce(NO3)3} additives was studied. The introduction of additives was carried out by an incipient wet impregnation method to ensure uniform distribution of cerium and copper nitrates within the structure of coal powdery samples (according to SEM and EDX mapping). The samples reactivity was studied in an isothermal oxidation regime at 200 °C (1 h) and by DSC/TGA at 2.5 °C/min heating rate. The additives implementation was found to reduce significantly the oxidation onset temperature (?Ti?=?20–55 °C), the samples oxidation delay time (?ti?=?2–22 min) and overall duration of the oxidation process (?tc?=?8–16 min). The additives efficiency could be graded in accordance with the activation on the coal oxidation in the following row: Cu(NO3)2?>?{Cu(NO3)2?+?Ce(NO3)3}?>?Ce(NO3)3. According to the mass spectroscopy, the obtained row of activation correlates well with the initial temperature of the studied nitrate’s decomposition (from 190 to 223 °C). A presence of nitrates was found to change significantly the trend of heat release taking place during the oxidation of coal samples (according to DSC/TGA data). The influence of coal morphology and volatiles content in initial sample on the parameters of the oxidation process was studied as well. Activation energy (Ea) of the coal oxidation was calculated using Coats–Redfern method. Maximum decrease in Ea from 69 to 58 kJ/mol was observed for the samples with Cu(NO3)2. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t International Journal of Coal Science and Technology | ||
| 463 | |t Vol. 6, iss. 1 |v [P. 37-50] |d 2019 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a coal oxidation | |
| 610 | 1 | |a reactivity | |
| 610 | 1 | |a DSC/DTG/TGA/MS | |
| 610 | 1 | |a copper nitrate | |
| 610 | 1 | |a cerium nitrate | |
| 610 | 1 | |a уголь | |
| 610 | 1 | |a окисление | |
| 610 | 1 | |a реактивность | |
| 610 | 1 | |a нитраты | |
| 700 | 1 | |a Larionov |b K. B. |c specialist in the field of power engineering |c technician of Tomsk Polytechnic University |f 1990- |g Kirill Borisovich |3 (RuTPU)RU\TPU\pers\35705 | |
| 701 | 1 | |a Gromov |b A. A. | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Инженерная школа энергетики |b Научно-образовательный центр И. Н. Бутакова (НОЦ И. Н. Бутакова) |3 (RuTPU)RU\TPU\col\23504 |
| 801 | 2 | |a RU |b 63413507 |c 20190805 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1007/s40789-018-0229-y | |
| 942 | |c CF | ||