Decomposition of lithium amide and lithium imide with and without anion promoter / Junqing Zhang in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8058-8064 Titre : Decomposition of lithium amide and lithium imide with and without anion promoter Type de document : texte imprimé Auteurs : Junqing Zhang, Auteur ; Yun Hang Hu, Auteur Année de publication : 2011 Article en page(s) : pp. 8058-8064 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Promoter Résumé : The decompositions of lithium amide (LiNH2) and lithium imide (Li2NH) are important steps for hydrogen storage in Li3N. Herein, the decompositions of LiNH2 and Li2NH with and without anion promoter were investigated by using temperature-programmed decomposition (TPD) and X-ray diffraction (XRD) techniques. It was found that the decomposition of LiNH2 produced Li2NH and NH3 via two steps in the temperature range of 300—450 °C: LiNH2 into a stable intermediate species (Li1.5NH1.5) and then into Li2NH. Furthermore, Li2NH is decomposed into Li, H2, and N2 without formation of Li3N in the temperature range of 550-750 °C. The decompositions of LiNH2 and Li2NH can be promoted by chloride ion (Cl-). The introduction of Cl- into LiNH2 resulted in the generation of a new NH3 peak at low temperature of 250 °C besides the original NH3 peak at 330 °C in its TPD profiles. Furthermore, Cl- can decrease the decomposition temperature of Li2NH by about 110 °C. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332131 [article] Decomposition of lithium amide and lithium imide with and without anion promoter [texte imprimé] / Junqing Zhang, Auteur ; Yun Hang Hu, Auteur . - 2011 . - pp. 8058-8064. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 8058-8064 Mots-clés : Promoter Résumé : The decompositions of lithium amide (LiNH2) and lithium imide (Li2NH) are important steps for hydrogen storage in Li3N. Herein, the decompositions of LiNH2 and Li2NH with and without anion promoter were investigated by using temperature-programmed decomposition (TPD) and X-ray diffraction (XRD) techniques. It was found that the decomposition of LiNH2 produced Li2NH and NH3 via two steps in the temperature range of 300—450 °C: LiNH2 into a stable intermediate species (Li1.5NH1.5) and then into Li2NH. Furthermore, Li2NH is decomposed into Li, H2, and N2 without formation of Li3N in the temperature range of 550-750 °C. The decompositions of LiNH2 and Li2NH can be promoted by chloride ion (Cl-). The introduction of Cl- into LiNH2 resulted in the generation of a new NH3 peak at low temperature of 250 °C besides the original NH3 peak at 330 °C in its TPD profiles. Furthermore, Cl- can decrease the decomposition temperature of Li2NH by about 110 °C. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332131

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