Synthesis of liquid fuel via direct hydrogenation of CO2

Synthesis of liquid fuels (C5+hydrocarbons) via CO2hydrogenation is very promising. Hydrogenation of CO2to liquid hydrocarbons usually proceeds through tandem catalysis of reverse water gas shift (RWGS) reaction to produce CO, and subsequent CO hydrogenation to hydrocarbons via Fischer–Tropsch synthesis (FTS). CO2is a thermodynamically stable and chemically inert molecule, and RWGS reaction is endothermic and needs a higher temperature, whereas FTS reaction is exothermic and is thermodynamically favored at a lower temperature. Therefore, the reported technologies have some obvious drawbacks, such as high temperature, low selectivity, and use of complex catalysts. Herein we discovered that a simple Co6/MnOxnanocatalyst could efficiently catalyze CO2hydrogenation. The reaction proceeded at 200 °C, which is much lower than those reported so far. The selectivity of liquid hydrocarbon (C5to C26, mostlyn-paraffin) in total product could reach 53.2 C-mol%, which is among the highest reported to date. Interestingly, CO was hardly detectable during the reaction. The in situ Fourier transform infrared characterization and13CO labeling test confirmed that the reaction was not via CO, accounting for the eminent catalytic results. This report represents significant progress in CO2chemistry and CO2transformation.

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K-Promoted Ni-Based Catalysts for Gas-Phase CO2 Conversion: Catalysts Design and Process Modelling Validation

Frontiers in Chemistry ◽

10.3389/fchem.2021.785571 ◽

2021 ◽

Vol 9 ◽

Author(s):

J. Gandara-Loe ◽

E. Portillo ◽

J. A. Odriozola ◽

T. R. Reina ◽

L. Pastor-Pérez

Keyword(s):

Coke Formation ◽

Surface Characteristics ◽

Process Modelling ◽

Metal Catalyst ◽

Reaction Conditions ◽

Reverse Water Gas Shift ◽

Rwgs Reaction ◽

Lower Temperature ◽

Water Gas ◽

Good Agreement

The exponential growth of greenhouse gas emissions and their associated climate change problems have motivated the development of strategies to reduce CO2 levels via CO2 capture and conversion. Reverse water gas shift (RWGS) reaction has been targeted as a promising pathway to convert CO2 into syngas which is the primary reactive in several reactions to obtain high-value chemicals. Among the different catalysts reported for RWGS, the nickel-based catalyst has been proposed as an alternative to the expensive noble metal catalyst. However, Ni-based catalysts tend to be less active in RWGS reaction conditions due to preference to CO2 methanation reaction and to the sintering and coke formation. Due to this, the aim of this work is to study the effect of the potassium (K) in Ni/CeO2 catalyst seeking the optimal catalyst for low-temperature RWGS reaction. We synthesised Ni-based catalyst with different amounts of K:Ni ratio (0.5:10, 1:10, and 2:10) and fully characterised using different physicochemical techniques where was observed the modification on the surface characteristics as a function of the amount of K. Furthermore, it was observed an improvement in the CO selectivity at a lower temperature as a result of the K-Ni-support interactions but also a decrease on the CO2 conversion. The 1K catalyst presented the best compromise between CO2 conversion, suppression of CO2 methanation and enhancing CO selectivity. Finally, the experimental results were contrasted with the trends obtained from the thermodynamics process modelling observing that the result follows in good agreement with the modelling trends giving evidence of the promising behaviour of the designed catalysts in CO2 high-scale units.

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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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Fast oxygen ion migration in Cu–In–oxide bulk and its utilization for effective CO2 conversion at lower temperature

Chemical Science ◽

10.1039/d0sc05340f ◽

2021 ◽

Author(s):

Jun-Ichiro Makiura ◽

Takuma Higo ◽

Yutaro Kurosawa ◽

Kota Murakami ◽

Shuhei Ogo ◽

...

Keyword(s):

Low Temperature ◽

Water Gas Shift ◽

Chemical Looping ◽

Co2 Conversion ◽

Ion Migration ◽

Oxygen Ion ◽

Reverse Water Gas Shift ◽

Oxygen Ion Migration ◽

Lower Temperature ◽

Water Gas

Efficient activation of CO2 at low temperature was achieved by reverse water–gas shift via chemical looping (RWGS-CL) by virtue of fast oxygen ion migration in a Cu–In structured oxide, even at lower temperatures.

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Boosting reverse water-gas shift reaction activity of Pt nanoparticles through light doping of W

Journal of Materials Chemistry A ◽

10.1039/d1ta03480d ◽

2021 ◽

Author(s):

Daiya Kobayashi ◽

Hirokazu Kobayashi ◽

Kohei Kusada ◽

Tomokazu Yamamoto ◽

Takaaki Toriyama ◽

...

Keyword(s):

Pt Nanoparticles ◽

Water Gas Shift ◽

Solid Solution Alloy ◽

Alloy Nanoparticles ◽

Water Gas Shift Reaction ◽

Reverse Water Gas Shift ◽

Rwgs Reaction ◽

Shift Reaction ◽

Water Gas ◽

First Time

We report PtW solid-solution alloy nanoparticles (NPs) as a reverse water-gas shift (RWGS) reaction catalyst for the first time. Atomic-level alloying of Pt and W significantly enhanced the RWGS reaction activity of Pt NPs.

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Study of the origin of the deactivation of a Pt/CeO catalyst during reverse water gas shift (RWGS) reaction

Journal of Catalysis ◽

10.1016/j.jcat.2004.06.011 ◽

2004 ◽

Vol 226 (2) ◽

pp. 382-392 ◽

Cited By ~ 115

Author(s):

A GOGUET ◽

F MEUNIER ◽

J BREEN ◽

R BURCH ◽

M PETCH ◽

...

Keyword(s):

Water Gas Shift ◽

Reverse Water Gas Shift ◽

Rwgs Reaction ◽

Water Gas

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Heterojunction-Redox Catalysts of FexCoyMg10CaO for High-Temperature CO2 Capture and In-situ Conversion in the Context of Green Manufacturing

Energy & Environmental Science ◽

10.1039/d0ee03320k ◽

2021 ◽

Author(s):

Bin Shao ◽

Guihua Hu ◽

Khalil A.M. Alkebsi ◽

Guanghua Ye ◽

Xiaoqing Lin ◽

...

Keyword(s):

Carbon Capture ◽

Green Manufacturing ◽

Water Gas Shift ◽

Co2 Utilization ◽

Calcium Looping ◽

Reverse Water Gas Shift ◽

Rwgs Reaction ◽

Promising Solution ◽

Water Gas

The integration of carbon capture and CO2 utilization could be a promising solution to the crisis of global warming. By integrating the calcium-looping (CaL) and the reverse-water-gas-shift (RWGS) reaction, a...

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Catalytic manganese oxide nanostructures for the reverse water gas shift reaction

Nanoscale ◽

10.1039/c9nr06078b ◽

2019 ◽

Vol 11 (35) ◽

pp. 16677-16688 ◽

Cited By ~ 6

Author(s):

Yulian He ◽

Ke R. Yang ◽

Ziwei Yu ◽

Zachary S. Fishman ◽

Laura A. Achola ◽

...

Keyword(s):

Synthetic Methods ◽

Water Gas Shift ◽

Water Gas Shift Reaction ◽

Structure Property ◽

Structure Property Relationships ◽

Oxide Nanostructures ◽

Reverse Water Gas Shift ◽

Rwgs Reaction ◽

Shift Reaction ◽

Water Gas

We develop efficient synthetic methods to prepare various MnO2 structures and investigate their structure–property relationships as applied to the reverse Water Gas Shift (rWGS) reaction with a combination of experimental and theoretical tools.

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