NH₃-Induced Challenges in CO₂ Hydrogenation over the Cu/ZnO/Al₂O₃ Catalyst

JACS Au, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

Gas sources rich in CO2 derived from biomass/waste gasification, anaerobic digestion, or industrial carbon capture often contain impurities such as H2S, H2O, and NH3, which can significantly hinder catalyst performance. Here, we show the role of NH3 on reverse water-gas shift (RWGS) reaction over a commercial Cu/ZnO/Al2O3 catalyst, examining its effects both catalytic activity structure. We found that reversibly decreases conversion immediately by suppressing carbonate hydrogenation CO desorption. This effect intensifies with an increase concentration but at higher temperatures. However, prolonged exposure (over 100 h) to RWGS conditions presence 1.4% leads near-total irreversible deactivation catalyst. Under exposure, loses Cu+ sites surface, causing spatial separation Cu ZnO. Finally, address this challenge, propose novel strategy mitigate inhibition decomposing into N2 H2.

Язык: Английский

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Design and recent Advances of novel MoS2-based catalysts for methanol from carbon dioxide hydrogenation

Separation and Purification Technology, Год журнала: 2025, Номер unknown, С. 132681 - 132681

Опубликована: Март 1, 2025

Язык: Английский

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Cobalt-doped Ni-based catalysts for low-temperature CO2 methanation

Renewable Energy, Год журнала: 2024, Номер unknown, С. 121512 - 121512

Опубликована: Окт. 1, 2024

Язык: Английский

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CO2 hydrogenation to methanol on Cu-ZnO/AlLaO with high activity and hydrothermal stability

Applied Catalysis A General, Год журнала: 2025, Номер 692, С. 120098 - 120098

Опубликована: Янв. 2, 2025

Язык: Английский

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Mechanochemical synthesis of Na promoted Fe-Cu catalyst for CO2 hydrogenation to multicarbon hydrocarbons

Fuel, Год журнала: 2025, Номер 393, С. 135036 - 135036

Опубликована: Март 14, 2025

Язык: Английский

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Experimental PSA reactor for methanol-enhanced production VIA CO2 hydrogenation

Separation and Purification Technology, Год журнала: 2024, Номер 351, С. 128030 - 128030

Опубликована: Май 20, 2024

Methanol synthesis via catalytic CO2 hydrogenation has emerged as one of the main ways to valorize CO2. The problem is that methanol reaction thermodynamically controlled, and there a parallel endothermic reaction, reverse water gas shift (RWGS), so low production ratios are achieved. In this scenario, process intensification, particularly multifunctional reactors where separation occur simultaneously, great interest. Sorption-enhanced processes (SERP) technologies widely used in equilibrium-controlled increase reagent conversion through selective product removal. Various authors have proposed SERP for methanol, but most them simulations studies it difficult find experimental data. aim work study selectivity based on four-step PSA reactor. been carried out with commercial Cu/ZnO/Al2O3 catalyst 3A zeolite adsorbent. Conversions beyond equilibrium achieved process, even complete at 50 bar, 250 °C, 300 °C. cyclic high conversions far from all range temperatures, 200–300 best results yield °C followed closely by 200 It worth mentioning methane detected transitory state bar. Also, purge step studied, concluding necessary adsorbent regeneration, improving steady state.

Язык: Английский

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CO2 Hydrogenation to Produce Methanol over Fe, Ga and Mo Modified ZnCu-MOF and ZnCuAl-LDH Composite Catalysts

Catalysis Letters, Год журнала: 2025, Номер 155(2)

Опубликована: Янв. 3, 2025

Язык: Английский

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Hydrogen Energy Storage via CO2 Hydrogenation over Catalysts Prepared by Layered Double Hydroxide Precursor

Catalysts, Год журнала: 2025, Номер 15(2), С. 111 - 111

Опубликована: Янв. 23, 2025

Converting CO2 and green hydrogen into products such as methane methanol not only has a negative carbon effect, but also stores renewable energy chemicals. This represents promising route for storage technologies. The hydrogenation of to methanol, which represent strongly exothermic reactions, are thermodynamically favored at low temperatures. However, the inherent inertness makes it difficult activate Both reactions face challenge activating temperature, so catalysts exhibiting high activity under conditions critical need. Layered double hydroxides (LDHs) have attracted considerable interest owing their regular layered structure uniform dispersion multiple metallic components. there few studies on same effects promoters over LDHs-derived catalysts. Here, we investigated two in different illustrate facilitating low-temperature activation By adding Fe Mn NiAl-Fe CuZnAl-Mn, crystal lattices were expanded, surface areas increased 38% 25%, reduction temperatures decreased 97 °C 10 °C, respectively. These significantly enhanced adsorption CuZnAl-Mn. methanation catalyst achieved conversion 80.8% 200 2 MPa, while synthesis CuZnAl-Mn exhibited 21.3% selectivity 61.8% 250 3 MPa. influence LDHs precursors’ addition catalytic performance studied by XRD, N2 adsorption–desorption, H2-TPR, H2-TPD, CO2-TPD.

Язык: Английский

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Modeling Thermocatalytic Systems for CO₂ Hydrogenation to Methanol

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

The hydrogenation of CO 2 to CH 3 OH over Cu-based catalysts holds significant potential for advancing carbon sequestration and sustainable chemical processes.

Язык: Английский

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Engineering CuZnOAl2O3 Catalyst for Enhancing CO2 Hydrogenation to Methanol

Molecules, Год журнала: 2025, Номер 30(6), С. 1350 - 1350

Опубликована: Март 18, 2025

The CuZnOAl2O3 catalyst shows excellent activity and selectivity in the reaction of CO2 hydrogenation to methanol as a consequence its controllable physicochemical properties, which is expected offer an efficient route renewable energy. In this study, catalysts are engineered by special pretreatment, constructing carbonate structure on surface catalyst. Compared unmodified catalyst, optimized (CZA-H-C1) not only exhibits improved 62.5% (250 °C 3 MPa) but also retains minimal degree deactivation 9.57% over 100 h period. By characterizing with XRD, TEM, XPS situ DRIFTS spectroscopy, it was found that species Cu-based could significantly enhance shield active sites. This study offers theoretical insights practical strategies for rational design optimization high-performance heterogeneous catalysts.

Язык: Английский

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