Evaluation of Carbonisation Gas from Coal and Woody Biomass and Reduction Rate of Carbon Composite Pellets
| Autor: | Kazuhira Ichikawa, Alexandre A. Xavier, Matheus Souza, Paulo Santos Assis, Francisco Pena, Hirotoshi Kawabata, Hideki Ono, Tateo Usui, Hirokazu Konishi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Article Subject Composite number Analytical chemistry Pellets Iron oxide chemistry.chemical_element 02 engineering and technology Activation energy 01 natural sciences 020501 mining & metallurgy chemistry.chemical_compound 0103 physical sciences lcsh:TA401-492 General Materials Science Coal 010302 applied physics business.industry General Engineering 0205 materials engineering chemistry lcsh:Materials of engineering and construction. Mechanics of materials Heat of combustion Particle size business Carbon |
| Zdroj: | Advances in Materials Science and Engineering, Vol 2018 (2018) Repositório Institucional da UFOP Universidade Federal de Ouro Preto (UFOP) instacron:UFOP |
| ISSN: | 1687-8434 |
| DOI: | 10.1155/2018/3807609 |
| Popis: | Carbon composite iron oxide pellets using semichar or semicharcoal were proposed from the measured results of the carbonisation gas release behaviour. The carbonisation was done under a rising temperature condition until arriving at a maximum carbonisation temperature Tc,max to release some volatile matter (VM). The starting point of reduction of carbon composite pellets using semicharcoal produced at Tc,max = 823 K under the rising temperature condition was observed at the reduction temperature TR = 833 K, only a little higher than Tc,max, which was the aimed phenomenon for semicharcoal composite pellets. As Tc,max increases, the emitted carbonisation gas volume increases, the residual VM decreases, and, as a whole, the total heat value of the carbonisation gas tends to increase monotonically. The effect of the particle size of the semicharcoal on the reduction rate was studied. When TR is higher than Tc,max, the reduction rate increases, as the particle size decreases. When TR is equal to Tc,max, there is no effect. With decreasing Tc,max, the activation energy Ea of semicharcoal decreases. The maximum carbonisation temperature Tc,max may be optimised for reactivity (1/Ea) of semicharcoal and the total carbonisation gas volume or the heat value. |
| Databáze: | OpenAIRE |
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