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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of operating parameters on H-2/CO2 conversion to methanol over Cu-Zn oxide supported on ZrO2 polymorph catalysts: Characterization and kinetics

Full text
Author(s):
Marcos, Francielle C. F. [1] ; Cavalcanti, Fabio M. [1] ; Petrolini, Davi D. [2] ; Lin, Lili [3] ; Betancourt, Luis E. [3] ; Senanayake, Sanjaya D. [3] ; Rodriguez, Jose A. [3] ; Assaf, Jose M. [4] ; Giudici, Reinaldo [1] ; Assaf, Elisabete M. [2]
Total Authors: 10
Affiliation:
[1] Univ Sao Paulo, Dept Chem Engn, Escola Politecn, Av Prof Luciano Gualberto, T 3, 380, BR-05508010 Sao Paulo, SP - Brazil
[2] Univ Sao Paulo, Sao Carlos Inst Chem, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP - Brazil
[3] Brookhaven Natl Lab, Chem Dept, Upton, NY 11973 - USA
[4] Univ Fed Sao Carlos, Rod W Luiz Km 235, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: CHEMICAL ENGINEERING JOURNAL; v. 427, JAN 1 2022.
Web of Science Citations: 1
Abstract

Kinetic aspects of the operating parameters for the catalytic conversion of H-2/CO2 to methanol over two novel catalysts were evaluated to understand the effect of the polymorphic ZrO2 phase composed of Cu0/+-ZnO sites at the atomic level and its impact on the reaction mechanism. The catalysts were characterized by in situ and ex-situ XRD, N-2 adsorption/desorption isotherms, FRX, TPR, TPD-N2O, in situ XANES, TPD-CO2, and in situ DRIFTS techniques. The influence of different reaction variables such as the GHSV, temperature, pressure, and H-2/CO2 ratio were studied using a fixed bed continuous plug flow reactor. The Cu-ZnO catalyst supported on the tetragonal zirconia polymorph exhibited the highest methanol yield due to the lower activation energy when compared to the catalyst with a greater amount of the monoclinic phase. In addition, the catalysts were reused for 8 cycles of 6 h to evaluate their stability, which can translate into lower costs for large-scale methanol production. The estimation of the kinetic parameters for the Cu-Zn oxide catalysts supported on ZrO2 polymorphs was important to understand the reaction mechanism, as well as to provide useful information for scaling up the process. (AU)

FAPESP's process: 19/10980-9 - Oxidative Coupling of Methane using A2B2O7 catalysts
Grantee:Davi Domingos Petrolini
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/08293-8 - Project 14: direct synthesis of methanol from CO2
Grantee:Francielle Candian Firmino Marcos
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/11940-5 - Evaluation of catalysts supported on carbon nanotubes and kinetic modeling of the process for the Water-Gas-Shift reaction (WGS)
Grantee:Fábio Machado Cavalcanti
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
Grantee:Julio Romano Meneghini
Support Opportunities: Research Grants - Applied Research Centers Program
FAPESP's process: 18/05799-0 - A surface science investigation of methanol synthesis on Cu-Ga/ZrO2 catalysts
Grantee:Francielle Candian Firmino Marcos
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor