| Titre : | CaC2 production from pulverized coke and CaO at low temperatures — reaction mechanisms (2012) |
| Auteurs : | Guodong Li, Auteur ; Qingya Liu, Auteur ; Zhenyu Liu, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 33, Août 2012) |
| Article en page(s) : | pp. 10742-10747 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Reaction mechanism Low temperature Production |
| Résumé : | CaC2 production with pulverized feeds was proven viable at temperatures about 400 °C lower than that required by the current electric arc technology (2100―2200 °C), which led to development of an autothemal process. For the purpose of reactor design, the reaction mechanism of coke (C) with CaO at temperatures up to 1750 °C is studied in a thermogravimetric analyzer (TGA) coupled with a mass spectrometer (MS). Results indicate that the reaction of C with CaO generally proceeds in three stages, starting at 1460 °C for CaC2 formation, followed by reaction of CaC2 with CaO and by decomposition of CaC2. The second stage is observable only at the complete consumption of C while the third is controlled by surface evaporation of Ca. Reaction behavior at the surface of coke and CaO particles is proposed, including the three-stage reactions and the role of CaC2―CaO eutectics, that promotes CaO diffusion and CaC2 production. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26286448 |
