2024-03-28T20:57:12Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1816342019-05-18T00:57:52Zcom_10261_46com_10261_3com_10261_101com_10261_5col_10261_299col_10261_354
León-Reina, Laura
Cabeza, Aurelio
Rius, Jordi
Maireles-Torres, Pedro
Alba Rubio, Ana Carolina
López Granados, Manuel
2019-05-17T10:53:24Z
2019-05-17T10:53:24Z
2013-04
Journal of Catalysis 300: 30-36 (2013)
0021-9517
http://hdl.handle.net/10261/181634
10.1016/j.jcat.2012.12.016
1090-2694
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100004837
http://dx.doi.org/10.13039/501100011011
Calcium diglyceroxide has been reported as a very active phase in the transesterification of triglycerides with methanol for biodiesel production. This work reports on the determination of the crystal structure of Ca diglyceroxide by Patterson-based direct methods from synchrotron X-ray powder diffraction (XRD) data in combination with characterisation by Differential Thermal Analysis-Thermogravimetry (DTA-TG), Scanning Electron Microscopy (SEM) and X-ray Photoelectron and Fourier Transform-Infrared spectroscopies (XPS and FT-IR). Its crystal structure is formed by molecular tetramers held together by a complex H-bond network. Both the XRD structural determination and the O1s XPS core level indicate the presence of a basic non-protonated O- anion at the surface of Ca diglyceroxide. Along with the presence of surface lipophilic CHx units, this O- anion may be the origin of this molecule's high activity relative to CaO.
eng
closedAccess
Structural and surface study of calcium glyceroxide, an active phase for biodiesel production under heterogeneous catalysis
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