Hydrogenation of CO<sub>2</sub>to Methanol at Atmospheric Pressure over Cu/ZnO Catalysts: Influence of the Calcination, Reduction, and Metal Loading

Díez-Ramírez, J.; Dorado, Fernando; Osa, A.R. de la; Valverde, J.L.; Sánchez, Paula

doi:10.1021/acs.iecr.6b04662

Cited by 58 publications

(54 citation statements)

References 53 publications

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“… and Díez‐Ramírez et al . have reported 100% selectivity for methanol on Pd 2 Ga and Cu/ZnO catalyst, respectively, at atmospheric pressure, but all of them suffer with poor CO 2 conversion. Zohour et al .…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Ahmad

Upadhyayula

2018

Env Prog and Sustain Energy

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Over the past few years, chemical conversion of CO2 to alternative fuels such as methanol, dimethyl ether (DME), and hydrocarbons (HCs) is one of the hot topics in chemical engineering. Taking this into consideration, we have investigated the effects of wide range of temperature, pressure and H2/CO2 ratio (with and without CO) on the hydrogenation of CO2 to methanol, DME, and HCs by minimizing the Gibbs free energy. The energy calculations indicate that HC synthesis reaction has the minimum Gibbs free energy change. High pressure, low temperature, and high H2/CO2 ratio favored the methanol and DME synthesis. The HC synthesis is favored by high pressure, low temperature, and high H2/CO2 ratio, but the presence of CO has a major effect on the HC selectivity. The presence of CO suppresses CO2 conversion in all the three reactions studied. CO2 conversion is maximum for the HC synthesis at H2/CO2 > 3. The experimental data obtained from laboratory scale fixed bed reactor show a reasonable comparison with the simulation results. The thermodynamic analysis combined with the catalyst development and chemical kinetics are expected to lead towards a competent methodology for CO2 conversion. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 98–111, 2019

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Section: Introductionmentioning

confidence: 99%

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Ahmad

Upadhyayula

2018

Env Prog and Sustain Energy

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“…Finally, the performance of the Pd 2 Ga/SiO 2 catalyst was compared with the reported literature (Table ) on low‐pressure methanol synthesis from CO 2 hydrogenation. The rate of methanol formation over Pd 2 Ga/SiO 2 catalyst is higher than that reported for most of the catalysts at atmospheric pressure . Table shows that the intermetallic Pd–Ga is more active and selective than Pd/ZnO, 37.5 PdCuZn/SiC, and Cu/ZnO catalyst.…”

Section: Catalyst Activity Testingmentioning

confidence: 73%

“…In CO 2 hydrogenation reaction to methanol, the selectivity of the desired product is highly sensitive to the catalyst structure . Different phases (with different Miller indices) in a metal‐loaded catalyst are a function of various parameters including catalyst preparation method, reduction temperature, and molar ratio of metals in bimetallic . In addition to the importance of catalyst structure, the reaction temperature, pressure, and feed ratio also exhibit preferential influence on the product formation.…”

Section: Introductionmentioning

confidence: 99%

Influence of reduction temperature on the formation of intermetallic Pd₂Ga phase and its catalytic activity in CO₂ hydrogenation to methanol

Ahmad

Upadhyayula

2019

Greenhouse Gases

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The global warming and change in climatic conditions due to rising concentration of CO2 in atmosphere are the most important challenges of 21st century. Catalytic conversion of CO2 to methanol will not only check global warming but also provide an alternative source of fuel. The phase purity of solid catalysts has a considerable influence on the desired product selectivity. Reduction temperature is one of the most important parameters responsible for catalyst phase formation. Herein, the effect of a range of reduction temperatures between 100 and 600°C on the phase composition of Pd–Ga bimetallic catalyst and CO2 hydrogenation to methanol activity was investigated. X‐ray diffraction (XRD) analysis revealed the formation of different phases at different reduction temperatures. The variation in catalyst structure was also analyzed using field emission scanning electron microscope‐energy dispersive X‐ray spectroscopy (FESEM‐EDS), Brunaue–Emmett–Teller, H2 chemisorption, and transmission electron microscopy techniques. The influence of reduction temperature, pressure (1–25 bar), H2/CO2 ratio (3–9), and reaction temperature (150–250°C) on methanol and CO selectivity from CO2 hydrogenation at atmospheric pressure was also studied. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.

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“…This configuration allows lower temperatures (around 90 • C) as compared to catalytic CO 2 hydrogenation processes (above 250 • C) [21,[29][30][31].…”

Section: Co 2 Conversion Electrocatalytic Experimentsmentioning

confidence: 99%

Low-Temperature Electrocatalytic Conversion of CO2 to Liquid Fuels: Effect of the Cu Particle Size

et al. 2018

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A novel gas-phase electrocatalytic system based on a low-temperature proton exchange membrane (Sterion) was developed for the gas-phase electrocatalytic conversion of CO 2 to liquid fuels. This system achieved gas-phase electrocatalytic reduction of CO 2 at low temperatures (below 90 • C) over a Cu cathode by using water electrolysis-derived protons generated in-situ on an IrO 2 anode. Three Cu-based cathodes with varying metal particle sizes were prepared by supporting this metal on an activated carbon at three loadings (50, 20, and 10 wt %; 50% Cu-AC, 20% Cu-AC, and 10% Cu-AC, respectively). The cathodes were characterized by N 2 adsorption-desorption, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) and their performance towards the electrocatalytic conversion of CO 2 was subsequently studied. The membrane electrode assembly (MEA) containing the cathode with the largest Cu particle size (50% Cu-AC, 40 nm) showed the highest CO 2 electrocatalytic activity per mole of Cu, with methyl formate being the main product. This higher electrocatalytic activity was attributed to the lower Cu-CO bonding strength over large Cu particles. Different product distributions were obtained over 20% Cu-AC and 10% Cu-AC, with acetaldehyde and methanol being the main reaction products, respectively. The CO 2 consumption rate increased with the applied current and reaction temperature.

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Hydrogenation of CO₂to Methanol at Atmospheric Pressure over Cu/ZnO Catalysts: Influence of the Calcination, Reduction, and Metal Loading

Cited by 58 publications

References 53 publications

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Influence of reduction temperature on the formation of intermetallic Pd₂Ga phase and its catalytic activity in CO₂ hydrogenation to methanol

Low-Temperature Electrocatalytic Conversion of CO2 to Liquid Fuels: Effect of the Cu Particle Size

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Hydrogenation of CO2to Methanol at Atmospheric Pressure over Cu/ZnO Catalysts: Influence of the Calcination, Reduction, and Metal Loading

Cited by 58 publications

References 53 publications

Greenhouse gas CO2 hydrogenation to fuels: A thermodynamic analysis

Greenhouse gas CO2 hydrogenation to fuels: A thermodynamic analysis

Influence of reduction temperature on the formation of intermetallic Pd2Ga phase and its catalytic activity in CO2 hydrogenation to methanol

Low-Temperature Electrocatalytic Conversion of CO2 to Liquid Fuels: Effect of the Cu Particle Size

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Hydrogenation of CO₂to Methanol at Atmospheric Pressure over Cu/ZnO Catalysts: Influence of the Calcination, Reduction, and Metal Loading

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Greenhouse gas CO₂ hydrogenation to fuels: A thermodynamic analysis

Influence of reduction temperature on the formation of intermetallic Pd₂Ga phase and its catalytic activity in CO₂ hydrogenation to methanol