SiO2 Promoted CaO Diffusion to C Phase at 1500 and 1700 °C
| Autor: | Yue Pan, Liu Zhenyu, Liu Qingya, Lijuan Ni, Renxing Wang, Junfei Wu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Control and Optimization
Materials science Kirkendall effect Calcium carbide Diffusion Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology 010402 general chemistry CaO lcsh:Technology 01 natural sciences chemistry.chemical_compound Phase (matter) Mass transfer SiO2 Graphite Electrical and Electronic Engineering Engineering (miscellaneous) lcsh:T Renewable Energy Sustainability and the Environment carbon diffusion calcium carbide Coke 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering 0210 nano-technology Carbon Energy (miscellaneous) |
| Zdroj: | Energies Volume 14 Issue 3 Energies, Vol 14, Iss 587, p 587 (2021) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en14030587 |
| Popis: | To better understand the mass transfer behaviors in CaC2 production from CaO and coke, this paper studies the diffusion behaviors of CaO and graphite, with or without ash, at 1500 and 1700 ° C. CaO and graphite are pressed into tablets and heated alone or in close contact. Physical and chemical changes in these tablets are analyzed by XRD and SEM+EDX. In some experiments, thin Mo wires are placed between the closely contacted CaO and graphite tablets to identify the diffusion direction. It is found that the diffusion between CaO and low-ash graphite is very limited. SiO2 in a high-ash graphite diffuses into CaO tablet and reacts with CaO to form Ca2SiO4, which then diffuses into the graphite tablet easily and leads to CaC2 formation at 1700 ° C. |
| Databáze: | OpenAIRE |
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