A comparative solid state 13C NMR and thermal study of CO2 capture by amidines PMDBD and DBN

Autor:	Eduardo R. deAzevedo, Fernanda Stuani Pereira, Aldo Eloizo Job, Deuber Lincon da Silva Agostini, Rafael Dias do Espírito Santo, Eduardo René Pérez González, Tito José Bonagamba
Rok vydání:	2011
Předmět:	Carbamate Moisture Chemistry medicine.medical_treatment Bicarbonate Inorganic chemistry Solid-state Carbon-13 NMR Pollution chemistry.chemical_compound Thermal medicine Environmental Chemistry Organic chemistry Gravimetric analysis Thermal analysis
Zdroj:	Green Chemistry. 13:2146
ISSN:	1463-9270 1463-9262
DOI:	10.1039/c1gc15457e
Popis:	The present work shows study of the CO2 capture by amidines DBN and PMDBD using 13C solid-state NMR and thermal techniques. The solid state 13C NMR analyses demonstrate the formation of a single PMDBD-CO2 product which was assigned to stable bicarbonate. In the case of DBN, it is shown that two DBN-CO2 products are formed, which are suggested to be stable bicarbonate and unstable carbamate. The role of water in the DBN-CO2 capture as well as the stability of the products to environmental moisture was also investigated. The results suggest that the carbamate formation is favored in dry DBN, but in the presence of water it decompose to form bicarbonate. Thermal analysis shows a good gravimetric CO2 absorption of DBN. Release of CO2 was found to be almost quantitative from the PMDBDH+ bicarbonate about 110 °C.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::22ac5cd558c72a54e9e9aba1c947c183 https://doi.org/10.1039/c1gc15457e Zobrazit plný text záznamu