Transformation of nitrogen during solar pyrolysis of algae in molten salt
Résumé
Molten salt pyrolysis of N-rich algae driven by concentrated solar energy is considered as an economical and environmentally friendly method to prepare N-doped value-added carbon. The transformation of nitrogen during the carbon production process by algae pyrolysis in molten Na2CO3-K2CO3 is investigated in-depth, which contributes to the utilization or treatment of nitrogen-containing products. Algae-N is mainly converted to gassingle bondN, and the gas-N yield increases as temperature rises, reaching 75.7 wt.% at 900 °C. Molten salt reduces the release temperature of all N-containing gas, captures 89.6% of HCN as CN−, and promotes the release of NH3 and NO. The char-N is dominated by pyrrole-N and quaternary-N at 800–900 °C due to the promotion of molten salt and higher temperature. The major contributors to the bio-oil-N yield are pentadecanenitrile, isoamyl cyanide, benzyl nitrile, styryl cyanide, pyrrole and indole. Nitriles and indoles are promising N-containing products in value-added carbon production, while NH3 and NO are primary pollution gas to be controlled.
Domaines
Sciences de l'ingénieur [physics]
Fichier principal
Transformation-of-nitrogen-during-solar-pyrolysis-of-algae-in-molten-salt.pdf (3.44 Mo)
Télécharger le fichier
Transformation-of-nitrogen-during-solar-pyrolysis-of-algae-in-molten-salt (1).pdf (3.44 Mo)
Télécharger le fichier
Origine | Fichiers produits par l'(les) auteur(s) |
---|