Strength and Gasification Reactivity of Coke Prepared by Blending a Ca/C Composite and Coal
| Autor: | Yuting Wang, Yuuki Mochizuki, Naoto Tsubouchi, Miki Takahashi, Javzandolgor Bud |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
calcium
business.industry Mechanical Engineering Composite number Metals and Alloys chemistry.chemical_element gasification Coke Calcium coke reactivity chemistry Chemical engineering Mechanics of Materials carbonaceous material Materials Chemistry Coal Reactivity (chemistry) composite business strength |
| Zdroj: | ISIJ international. 61(8):2200-2210 |
| ISSN: | 0915-1559 |
| Popis: | In this study, a calcium/carbon composite (Ca/C) was prepared from porous Ca0 by the water vapor swelling method; its pores were filled with tar-derived carbonaceous material to produce high-strength and highly reactive coke. The properties of coke prepared by blending the Ca/C composite and caking-coal were then investigated. The mesopores in the swelling Ca disappeared and the crushing strength was developed by filling tar-derived carbonaceous material into the porous Ca. Thus, a Ca/C composite could be produced by the abovementioned method, wherein the tar-derived carbonaceous material and Ca species were in close proximity. When the Ca/C composite was blended into the caking-coal, the strength of the coke obtained increased by up to 50% of Ca/C blending, which made it possible to produce high-strength coke. On examining the C structure of the prepared coke by X-ray diffraction, that of the original coke was found to be almost unchanged by adding the Ca/C composite. Conversely, the Ca/C blended-coke showed higher CO2 gasification reactivity than the original coke prepared from caking-coal. Based on the CO2 gasification reactivity test of the demineralized coke, it was clear that an increase in the gasification reactivity of the Ca/C blended-coke depended upon the catalytic effect of Ca. Thus, this method helped produce high-strength and highly reactive coke. |
| Databáze: | OpenAIRE |
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