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Ga-Ni nanoparticles supported on porous silica for methanol synthesis from CO2 at low pressures

Grant number: 17/22671-5
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2018
Effective date (End): January 31, 2022
Field of knowledge:Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
Principal Investigator:Elisabete Moreira Assaf
Grantee:Letícia Fernanda Rasteiro
Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
Associated scholarship(s):19/22260-0 - Sub-monolayer control of the growth of ZrO2 films over ordered mesoporous silica supports and interface tailoring of Ni-Ga catalysts by atomic layer deposition (ALD), BE.EP.DR


Currently, methanol, one of the main products of interest in the chemical industry, is produced from the synthesis gas (CO/H2) in a high pressure process (50-100 bar) using Cu/ZnO/Al2O3 as catalyst. The increase in world demand for methanol predicted for the next years makes necessary the development of alternative, selective and low cost processes for its synthesis. An alternative route that has gained a lot of attention in recent years is the well-known CCUS (Carbon Capture Utilization and Storage), which, in addition to capturing and storing CO2 from a variety of stationary and mobile sources, transforms it into higher added value products such as or methanol. This route participates in the current technologies of CO2 abatement. Among the catalysts used for CO2 hydrogenation for methanol formation, the great majority are based on Cu and little study was done with catalysts based on other metals. In this project, supported and unsupported Ni-Ga catalysts will be evaluated in CO2 hydrogenation under low pressure conditions. It is intended to carry out the study of the alloy composition seeking the best catalytic properties, through the synthesis using a surfactant-assisted method, which can act to control the size and homogeneity of the formed particles. The porosity control of the support will also be evaluated in order to find dimensions in the order of mesopores, since these allow a good dispersion of the metallic phase. It is also intended to modify the support basicity and evaluate this effect on the catalytic activity and selectivity, since CO2 adsorption occurs at catalyst basic sites and these are essential for a high selectivity to methanol. In situ and operando characterization techniques (XPD, XAS, DRIFTS) will be used in order to obtain a catalyst activity/property correlation and information about the reaction mechanism. (AU)

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Scientific publications (7)
(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)
RASTEIRO, LETICIA F.; DE SOUSA, RAFAEL A.; VIEIRA, LUIZ H.; OCAMPO-RESTREPO, VIVIANNE K.; VERGA, LUCAS G.; ASSAF, JOSE M.; DA SILVA, JUAREZ L. F.; ASSAF, ELISABETE M.. Insights into the alloy-support synergistic effects for the CO2 hydrogenation towards methanol on oxide-supported Ni5Ga3 catalysts: An experimental and DFT study. APPLIED CATALYSIS B-ENVIRONMENTAL, v. 302, . (17/11631-2, 15/06246-7, 19/05561-7, 18/21401-7, 18/12021-6, 14/50279-4, 17/22671-5, 19/22260-0)
ROSSI, MARCO A.; VIEIRA, LUIZ H.; RASTEIRO, LETICIA F.; FRAGA, MARCO A.; ASSAF, JOSE M.; ASSAF, ELISABETE M.. Promoting effects of indium doped Cu/CeO2 catalysts on CO2 hydrogenation to methanol. REACTION CHEMISTRY & ENGINEERING, v. 7, n. 7, p. 14-pg., . (18/12021-6, 15/06246-7, 14/50279-4, 17/22671-5, 17/10154-6)
ROSSI, MARCO A.; RASTEIRO, LETICIA F.; VIEIRA, LUIZ H.; FRAGA, MARCO A.; ASSAF, JOSE M.; ASSAF, ELISABETE M.. Investigation of In Promotion on Cu/ZrO2 Catalysts and Application in CO2 Hydrogenation to Methanol. CATALYSIS LETTERS, v. N/A, p. 17-pg., . (14/50279-4, 17/22671-5, 18/12021-6, 17/10154-6, 15/06246-7)
RASTEIRO, LETICIA F.; MOTIN, ABDUL; VIEIRA, LUIZ H.; ASSAF, ELISABETE M.; ZAERA, FRANCISCO. Growth of ZrO2 films on mesoporous silica sieve via atomic layer deposition. Thin Solid Films, v. 768, p. 6-pg., . (14/50279-4, 17/22671-5, 19/22260-0, 18/12021-6, 15/06246-7)
VIEIRA, LUIZ H. H.; RASTEIRO, LETICIA F.; SANTANA, CASSIA S.; CATUZO, GABRIEL L. L.; DA SILVA, ALISSON H. M.; ASSAF, JOSE M.; ASSAF, ELISABETE M. M.. Noble Metals in Recent Developments of Heterogeneous Catalysts for CO2 Conversion Processes. CHEMCATCHEM, v. N/A, p. 35-pg., . (14/50279-4, 17/22671-5, 20/15230-5, 17/05241-7)
RASTEIRO, LETICIA F.; ROSSI, MARCO A. L. S.; ASSAF, JOSE M.; ASSAF, ELISABETE M.. Low-pressure hydrogenation of CO2 to methanol over Ni-Ga alloys synthesized by a surfactant-assisted co-precipitation method and a proposed mechanism by DRIFTS analysis. CATALYSIS TODAY, v. 381, n. SI, p. 261-271, . (14/50279-4, 17/22671-5, 15/06246-7, 17/10154-6)
SANTANA, CASSIA S.; RASTEIRO, LETICIA F.; MARCOS, FRANCIELLE C. F.; ASSAF, ELISABETE M.; GOMES, JANAINA F.; ASSAF, JOSE M.. Influence of Al, Cr, Ga, or Zr as promoters on the performance of Cu/ZnO catalyst for CO2 hydrogenation to methanol. MOLECULAR CATALYSIS, v. 528, p. 9-pg., . (17/08420-0, 17/22671-5, 18/24339-0, 17/05241-7, 17/08293-8)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
RASTEIRO, Letícia Fernanda. Study of Ni-Ga catalysts for methanol synthesis from CO2 hydrogenation at low pressures. 2022. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Química de São Carlos (IQSC/BT) São Carlos.

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