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Synthesis of organic carbonates from CO2 and ethanol-Guerbet compounds catalyzed by Cu-hydrotalcites modified with Ag+, Ni2+, Fe3+, La3+ or Nb5+.

Grant number: 16/15575-7
Support type:Scholarships abroad - Research Internship - Doctorate
Effective date (Start): January 20, 2017
Effective date (End): January 19, 2018
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
Principal researcher:Mauricio Boscolo
Grantee:Olavo Micali Perrone
Supervisor abroad: Dibenedetto Angela
Home Institution: Instituto de Biociências, Letras e Ciências Exatas (IBILCE). Universidade Estadual Paulista (UNESP). Campus de São José do Rio Preto. São José do Rio Preto , SP, Brazil
Research place: Università degli Studi di Bari - Aldo Moro, Italy  
Associated to the scholarship:15/11588-4 - Hydrotalcites containing Ag, Cu, Ni, Fe, La or Nb as catalysts for dehydrogenation of ethanol and hydrogenation of sugar cane bagasse, BP.DR


The proposed research project aims to use mixed metal oxides (MMO) derived from layered double hydroxides (LDHs) like-hydrotalcite containing Cu2+ as solid catalysts in ethanol reforming at high CO2 pressure to produce two classes of compounds, namely: 1. Guerbet compounds and 2. acyclic organic carbonates. The general formula of the Cu-Hydrotalcite used as a reference, is (Cu0.1Mg0.9)6Al2(CO3)(OH)16*4(H2O) and can be easily synthesized by coprecipitation of saline solutions with hydrotalcite constituent metals in alkaline medium containing CO32-. The Cu-MMO obtained by calcination at 450 °C has active surface for reforming of alcohols. This study will investigate the catalytic activity and selectivity of Cu-MMO modified by the inclusion of 1% (m/m) de Ag+, Ni2+, Fe3+, La3+ or Nb5+ separately, for ethanol reforming process (hydrous and anhydrous) under high CO2 pressure (5 MPa) between 160 to 320 ºC. As a consequence of ethanol dehydrogenation, a variety of value-added compounds is formed by a process known as Guerbet Reaction, whose products can be alcohols, ester, ethers or ketones. Under high CO2 pressures Guerbet compounds can react each other to form acyclic organic carbonates saturated and unsaturated with wide application in cosmetics, polymers, pesticides or medicines, and also contribute to CO2 fixation. The carboxylation can be carried out in one-pot with the Guerbet reaction or higher alcohols can be isolated and reacted in a second time.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SIQUEIRA, MARCOS RECHI; PERRONE, OLAVO MICALI; METZKER, GUSTAVO; DE OLIVEIRA LISBOA, DANIELA CORREA; THOMEO, JOAO CLAUDIO; BOSCOLO, MAURICIO. Highly selective 1-butanol obtained from ethanol catalyzed by mixed metal oxides: Reaction optimization and catalyst structure behavior. MOLECULAR CATALYSIS, v. 476, . (16/15575-7, 17/13230-5, 92/03515-3, 15/11588-4, 13/23886-4)
PERRONE, OLAVO MICALI; LOBEFARO, FRANCESCO; ARESTA, MICHELE; NOCITO, FRANCESCO; BOSCOLO, MAURICIO; DIBENEDETTO, ANGELA. Butanol synthesis from ethanol over CuMgAl mixed oxides modified with palladium (II) and indium (III). Fuel Processing Technology, v. 177, p. 353-357, . (16/15575-7)
PERRONE, OLAVO MICALI; SIQUEIRA, MARCOS RECHI; METZKER, GUSTAVO; DE OLIVEIRA LISBOA, DANIELA CORREA; BOSCOLO, MAURICIO. Copper and lanthanum mixed oxides as catalysts for ethanol Guerbet coupling: The role of La3+ on the production of long-chain alcohols. ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY, v. 40, n. 2, . (16/15575-7, 17/13230-5, 15/11588-4)

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