|
| Interfacial Reaction of Carbochlorination Mechanism of Fly Ash |
|
Received:November 30, 2022
Revised:November 30, 2022
Accepted:December 29, 2022
Published Online:June 25, 2023
|
| View Full Text View/Add Comment Download reader |
| DOI： |
| KeyWord:carbochlorination,fly;ash,Interfacial;reaction,aluminum;chloride |
| Author | Institution |
| liuyan |
Institute of Process Engineering, Chinese Academy of Sciences |
| Duan Dongping |
Institute of Process Engineering, Chinese Academy of Sciences |
| Li Yanjiang |
Institute of Process Engineering, Chinese Academy of Sciences |
| Chen Siming |
Institute of Process Engineering, Chinese Academy of Sciences |
|
| Hits: 1615 |
| Download times: 770 |
| Abstract: |
| Carbochlorination process is used to extract aluminum, iron and silicon from fly ash to prepare high-value chlorinated products in this paper. The effects of changes in chlorination temperature, chlorination time, carbon type, coke content and particle size of raw materials on carbochlorination process of fly ash were studied. The results show that the chlorination temperature has a greater influence on the chlorination process of fly ash. The higher the temperature, the better the chlorination effects of aluminum, iron and silicon in fly ash. The chlorination rate of aluminum, iron and silicon in fly ash is faster in the early stage, and the chlorination rate increased slowly after 30 min. Different types of carbon also have a greater impact on the chlorination rate of aluminum, iron and silicon in fly ash. Because activated carbon has a larger specific surface area and void structure, activated carbon has the best chlorination effect. As the coke content increases, the chlorination rate of aluminum, iron and silicon gradually increases, and the chlorination rate does not change much after 30%. The finer the particle sizes of fly ash and coke, the better the chlorination effect. When the particle size of fly ash and coke is below 400 mesh, the chlorination rates of iron, aluminum and silicon are 91%, 88% and 41%, respectively. |
| Close |
|
|
|