Speaker
Description
Introduction
Chemical fixation of CO2 and its utilization as C1 building block into fine chemicals are among key areas ofresearch to mitigate this greenhouse gas. One strategy is to use catalysts to form cyclic organic carbonates bycoupling reaction between CO2 and epoxides. These organic compounds are very interesting in industry dueto their enormous scope of applications [1]. Since Yano and coworkers [2] published the cycloaddition reaction between propylene oxide and CO2 usinga stoichiometric amount of MgO, this material has been studied as a non-toxic, recyclable and cheap materialfor CO2 fixation to obtain valuable products.
Results and Discussion
A library of nanocrystalline MgO materials has been synthesized by precipitation method of brucite followed by calcination at different conditions. Mixed materials MgO/MO (M=Zn) were additionally prepared. Moreover, Mg nanoparticles were obtained following organometallic procedure. These materials were fully characterized by XDR diffraction, Transmission Electronic Microscopy (TEM) and Scanning Electron Microscopy (SEM). Afterwards, these materials have been tested as catalyst in the cycloaddition reaction of CO2 andpropylene oxide to obtain cyclic carbonates.Nanocrystalline MgO materials were synthetized using different commercially available Mg precursors toobtain brucite and then calcined under selected conditions to afford new catalysts with different morphologiesand surface. Surface area of materials were determined to study the contribution in catalytic results.Catalytic cycloaddition of CO2 and epoxides to obtain cyclic carbonates was optimized using a heterogeneousrecyclable and non-toxic nano-MgO catalysts. This procedure allows the obtention of cheap cyclic carbonatesthat could be used for several applications. The system is completely recyclable several times without loss of activity.
References
[1] M. North, R. Pasquale, C. Young, Green Chem. 2010, 12, 1514–1539.
[2] T. Yano, H. Matsui, T. Koike, H. Ishiguro, H. Fujihara, M. Yoshihara, T. Maeshima, Chem. Commun.(Camb) 1997, 12, 1129–1130.
| Speaker Country | Spain |
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