Reactivity of a Zirconia–Copper Inverse Catalyst for CO2 Hydrogenation

Yilin Ma; Jason Wang; Kenneth R. Goodman; Ashley R. Head; Xiao Tong; Dario J. Stacchiola; Michael G. White

doi:10.1021/acs.jpcc.0c06624

CO2 hydrogenation to methanol catalyzed by Ni5Ga3 metal alloy

SSRN Electronic Journal ◽

10.2139/ssrn.3366044 ◽

2019 ◽

Author(s):

Yuhan Men ◽

Xin Fang ◽

Fan Wu ◽

Ranjeet Singh ◽

Penny Xiao ◽

...

Keyword(s):

Co2 Hydrogenation ◽

Metal Alloy

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Production of Fuels and Chemicals from a CO2/H2 Mixture

Reactions ◽

10.3390/reactions1020011 ◽

2020 ◽

Vol 1 (2) ◽

pp. 130-146

Author(s):

Yali Yao ◽

Baraka Celestin Sempuga ◽

Xinying Liu ◽

Diane Hildebrandt

Keyword(s):

Co2 Hydrogenation ◽

Water Gas Shift ◽

Liquid Fuels ◽

Saturated Hydrocarbons ◽

Reverse Water Gas Shift ◽

Cu Catalyst ◽

In Series ◽

Fuels And Chemicals ◽

Water Gas ◽

Aspen Simulation

In order to explore co-production alternatives, a once-through process for CO2 hydrogenation to chemicals and liquid fuels was investigated experimentally. In this approach, two different catalysts were considered; the first was a Cu-based catalyst that hydrogenates CO2 to methanol and CO and the second a Fisher–Tropsch (FT) Co-based catalyst. The two catalysts were loaded into different reactors and were initially operated separately. The experimental results show that: (1) the Cu catalyst was very active in both the methanol synthesis and reverse-water gas shift (R-WGS) reactions and these two reactions were restricted by thermodynamic equilibrium; this was also supported by an Aspen plus simulation of an (equilibrium) Gibbs reactor. The Aspen simulation results also indicated that the reactor can be operated adiabatically under certain conditions, given that the methanol reaction is exothermic and R-WGS is endothermic. (2) the FT catalyst produced mainly CH4 and short chain saturated hydrocarbons when the feed was CO2/H2. When the two reactors were coupled in series and the presence of CO in the tail gas from the first reactor (loaded with Cu catalyst) significantly improves the FT product selectivity toward higher carbon hydrocarbons in the second reactor compared to the standalone FT reactor with only CO2/H2 in the feed.

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Facet effect of In2O3 for methanol synthesis by CO2 hydrogenation: a mechanistic and kinetic study

Surfaces and Interfaces ◽

10.1016/j.surfin.2021.101244 ◽

2021 ◽

pp. 101244

Author(s):

Wenyi Wang ◽

Yifei Chen ◽

Minhua Zhang

Keyword(s):

Kinetic Study ◽

Methanol Synthesis ◽

Co2 Hydrogenation

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Understanding the structure-performance relationship of cubic In2O3 catalysts for CO2 hydrogenation

Journal of CO2 Utilization ◽

10.1016/j.jcou.2021.101543 ◽

2021 ◽

Vol 49 ◽

pp. 101543

Author(s):

Bin Qin ◽

Zhimin Zhou ◽

Shenggang Li ◽

Peng Gao

Keyword(s):

Co2 Hydrogenation ◽

Relationship Of

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Synergistic Effect of Alkali Na and K Promoter on Fe-Co-Cu-Al Catalysts for CO2 Hydrogenation to Light Hydrocarbons

Catalysts ◽

10.3390/catal11060735 ◽

2021 ◽

Vol 11 (6) ◽

pp. 735

Author(s):

Yuhao Zheng ◽

Chenghua Xu ◽

Xia Zhang ◽

Qiong Wu ◽

Jie Liu

Keyword(s):

Synergistic Effect ◽

Active Sites ◽

Intermediate Formation ◽

Active Phase ◽

Dissociative Adsorption ◽

Co2 Hydrogenation ◽

Chain Growth ◽

Co2 Conversion ◽

Light Hydrocarbons ◽

Active Centers

Alkali metal K- and/or Na-promoted FeCoCuAl catalysts were synthesized by precipitation and impregnation, and their physicochemical and catalytic performance for CO2 hydrogenation to light hydrocarbons was also investigated in the present work. The results indicate that Na and/or K introduction leads to the formation of active phase metallic Fe and Fe-Co crystals in the order Na < K < K-Na. The simultaneous introduction of Na and K causes a synergistic effect on increasing the basicity and electron-rich property, promoting the formation of active sites Fe@Cu and Fe-Co@Cu with Cu0 as a crystal core. These effects are advantageous to H2 dissociative adsorption and CO2 activation, giving a high CO2 conversion with hydrogenation. Moreover, electron-rich Fe@Cu (110) and Fe-Co@Cu (200) provide active centers for further H2 dissociative adsorption and O-C-Fe intermediate formation after adsorption of CO produced by RWGS. It is beneficial for carbon chain growth in C2+ hydrocarbons, including olefins and alkanes. FeCoCuAl simultaneously modified by K-Na exhibits the highest CO2 conversion and C2+ selectivity of 52.87 mol% and 89.70 mol%, respectively.

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Facet-Dependent Reactivity of Ceria Nanoparticles Exemplified by CeO2-Based Transition Metal Catalysts: A Critical Review

Catalysts ◽

10.3390/catal11040452 ◽

2021 ◽

Vol 11 (4) ◽

pp. 452

Author(s):

Michalis Konsolakis ◽

Maria Lykaki

Keyword(s):

Transition Metal ◽

Co Oxidation ◽

Critical Review ◽

Rational Design ◽

Metal Catalysts ◽

Co2 Hydrogenation ◽

Transition Metal Catalysts ◽

Fine Tuning ◽

Ceria Nanoparticles ◽

Highly Active

The rational design and fabrication of highly-active and cost-efficient catalytic materials constitutes the main research pillar in catalysis field. In this context, the fine-tuning of size and shape at the nanometer scale can exert an intense impact not only on the inherent reactivity of catalyst’s counterparts but also on their interfacial interactions; it can also opening up new horizons for the development of highly active and robust materials. The present critical review, focusing mainly on our recent advances on the topic, aims to highlight the pivotal role of shape engineering in catalysis, exemplified by noble metal-free, CeO2-based transition metal catalysts (TMs/CeO2). The underlying mechanism of facet-dependent reactivity is initially discussed. The main implications of ceria nanoparticles’ shape engineering (rods, cubes, and polyhedra) in catalysis are next discussed, on the ground of some of the most pertinent heterogeneous reactions, such as CO2 hydrogenation, CO oxidation, and N2O decomposition. It is clearly revealed that shape functionalization can remarkably affect the intrinsic features and in turn the reactivity of ceria nanoparticles. More importantly, by combining ceria nanoparticles (CeO2 NPs) of specific architecture with various transition metals (e.g., Cu, Fe, Co, and Ni) remarkably active multifunctional composites can be obtained due mainly to the synergistic metalceria interactions. From the practical point of view, novel catalyst formulations with similar or even superior reactivity to that of noble metals can be obtained by co-adjusting the shape and composition of mixed oxides, such as Cu/ceria nanorods for CO oxidation and Ni/ceria nanorods for CO2 hydrogenation. The conclusions derived could provide the design principles of earth-abundant metal oxide catalysts for various real-life environmental and energy applications.

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