Effects of Slag Compositions on the Rate of Methane–Steam Reaction
Електронний архів E-archive DonNTU – (Electronic archive Donetsk National Technical University)
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Effects of Slag Compositions on the Rate of Methane–Steam Reaction
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| Creator |
Shimada, T.
Kochura, V. Akiyama, T. Kasai, E. Yagi, J. |
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| Subject |
heat recovery
molten slag methane–steam reaction slag composition mass ratio sulfur |
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| Description |
For the effective heat recovery from molten slag by utilizing a chemical reaction, rates of the methane–steam reaction on the slag surface were studied for thirteen slag samples, in which effects of mass ratio of CaO to SiO2 (CaO/SiO2 ratio), and concentrations of wustite (FeO) and sulfur in slag on the reaction rate were systematically examined in the slag temperature range from 1 473 to 1 823 K. The results showed that the higher CaO/SiO2 ratio, meaning the weaker network structure of molten slag, gives rise to the higher rate of methane–steam reaction. In contrast, the FeO addition to slag brings about the lower reaction rate than that for the slag without FeO, indicating the inhibitory effect of FeO on the reaction. The higher FeO concentration proportionally provides the stronger inhibitory effect over the slag temperature of 1 773 K, while it is independent on both of the slag temperature and the FeO concentration under the temperature of 1 673 K. The results also revealed that the sulfur contained in slag has the inhibitory effect on the methane-steam reaction, which is much larger than the equi-mass of FeO over 1 673 K. This inhibitory effect of sulfur increases with increasing the sulfur concentration from 0.5 to 1.0 mass%, whereas it is insignificantly enhanced by the further increase in the sulfur concentration. The authors wish to express their gratitude to New Energy and Industrial Technology Development Organization (NEDO) (No. 97E05003-1, Energy and Environmental Technology, Proposal-Based Program), The Iron and Steel Institute of Japan (ISIJ), Steel Industry Foundation for the Advancement of Environmental Protection Technology (SEPT), and the Ministry of Education, Science, Sports and Culture, Japan (Grant-in-aid for Scientific Research on Priority Areas (Zero-emission), 12015247), for their partial financial supports. |
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| Date |
2012-03-02T09:27:03Z
2012-03-02T09:27:03Z 2000 |
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| Type |
Article
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| Identifier |
http://ea.donntu.edu.ua/handle/123456789/6317
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| Language |
en
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| Publisher |
ISIJ International, Vol. 41 (2001), No. 2, pp. 111–115.
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