Study of the carbon dioxide chemical fixation—activation by guanidines
作者:Fernanda Stuani Pereira、Eduardo Ribeiro deAzevedo、Eirik F. da Silva、Tito José Bonagamba、Deuber L. da Silva Agostíni、Alviclér Magalhães、Aldo Eloizo Job、Eduardo R. Pérez González
DOI:10.1016/j.tet.2008.08.008
日期:2008.10
Fixation of CO2 is one of the most important priorities of the scientific community dedicated to reduce global warming. In this work, we propose new methods for the fixation of CO2 using the guanidine bases tetramethylguanidine (TMG) and 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]-pyrimidine (TBD). In order to understand the reactions occurring during the CO2 fixation and release processes, we employed several experimental methods, including solution and solid-state NMR, FTIR, and coupled TGA-FTIR. Quantum mechanical NMR calculations were also carried out. Based on the results obtained, we concluded that CO2 fixation with both TMG and TBD guanidines is a kinetically reversible process, and the corresponding fixation products have proved to be useful as transcarboxylating compounds. Afterward, CO2 thermal releasing from this fixation product with TBD was found to be an interesting process for CO2 capture and isolation purposes. (C) 2008 Elsevier Ltd. All rights reserved.
[EN] CARBAMOYLOXIME COMPOUND, AND POLYMERIZATION INITIATOR AND POLYMERIZABLE COMPOSITION CONTAINING SAID COMPOUND<br/>[FR] COMPOSÉ DE CARBAMOYLOXIME, ET INITIATEUR DE POLYMÉRISATION ET COMPOSITION POLYMÉRISABLE CONTENANT LEDIT COMPOSÉ<br/>[JA] カルバモイルオキシム化合物並びに該化合物を含有する重合開始剤及び重合性組成物