Journal ArticleDOI
The synergistic effect of Pd NPs and UiO-66 for enhanced activity of carbon dioxide methanation
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TLDR
In this paper, UiO-66 was employed as the support for palladium nanoparticles via a sol-gel method to enhance the activity of CO2 methanation, and the physicalchemical properties of as-prepared catalysts were characterized using N2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscope (TEM), temperature programmed desorption (TPD), temperature-programmed reduction (TPR), thermo-gravimetric analysis (TGA), Fourier transform infrared (FTIR) spectAbstract:
Carbon dioxide methanation is of great importance for both environment and energy because of the reduction of carbon dioxide emissions and the utilization of carbon source. In this work, UiO-66 was employed as the support for palladium nanoparticles via a sol-gel method to enhance the activity of CO2 methanation. The physical-chemical properties of as-prepared catalysts were characterized using N2 adsorption-desorption, X-ray diffraction (XRD), transmission electron microscope (TEM), temperature programmed desorption (TPD), temperature programmed reduction (TPR), thermo-gravimetric analysis (TGA), Fourier-transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS). It was found that there was a synergistic effect between UiO-66 and supported Pd. CO2 could be activated in UiO-66 via its Zr6O4(OH)4 nods, while H2 molecules were dissociated at Pd for further hydrogenation of activated CO2. As a result, the catalyst with a Pd loading of 6 wt.% exhibited a high activity with 56.0% of CO2 conversion and 97.3% of CH4 selectivity, corresponding to a STY of 856 g·h−1·kgcat−1 at 4 MPa and 340 °C.read more
Citations
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Journal ArticleDOI
A review of recent catalyst advances in CO2 methanation processes
TL;DR: In this article, a review focusing on various catalytic CO2 hydrogenation approaches for converting CO2 to fuels such as CH4 is presented, including thermal, catalytic-membrane, photo and plasma energy assisted processes.
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Recent trends in developments of active metals and heterogenous materials for catalytic CO2 hydrogenation to renewable methane: A review
Wei Keen Fan,Muhammad Tahir +1 more
TL;DR: In this paper, the authors highlight current trends in various active metals and heterogeneous catalyst supports used for thermal hydrogenation of CO2 to methane, and the mechanism of the hydrogenation reaction was also reviewed to determine its relationship with the catalyst active site structures.
Journal ArticleDOI
Recent advances in catalytic systems for CO2 conversion to substitute natural gas (SNG): Perspective and challenges
TL;DR: In this paper, the up-to-date developments on CO2 methanation catalysts and the optimal synergistic relationship between active metals, support, and promoters during the catalytic activity are reviewed.
Journal ArticleDOI
Recent Progresses in Constructing the Highly Efficient Ni Based Catalysts With Advanced Low-Temperature Activity Toward CO2 Methanation.
Chufei Lv,Leilei Xu,Mindong Chen,Yan Cui,Xueying Wen,Yaping Li,Cai-e Wu,Bo Yang,Zhichao Miao,Xun Hu,Qinghui Shou +10 more
TL;DR: The development of highly efficient Ni based catalysts with excellent low-temperature catalytic performances has become the research focus as well as challenge in this field.
Journal ArticleDOI
Influence of pretreatment conditions on low-temperature CO oxidation over Pd supported UiO-66 catalysts
TL;DR: In this paper, a series of Pd supported on UiO-66 catalysts were prepared by ethylene glycol reduction and the supported 0.5 wt% Pd was used to investigate the influence of pretreatment conditions.
References
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Journal ArticleDOI
Disclosing the Complex Structure of UiO-66 Metal Organic Framework: A Synergic Combination of Experiment and Theory
Loredana Valenzano,Bartolomeo Civalleri,Sachin Chavan,Silvia Bordiga,Merete Hellner Nilsen,Søren Jakobsen,Karl Petter Lillerud,Carlo Lamberti +7 more
TL;DR: In this paper, a detailed characterization of structural, vibrational, and electronic properties of UiO-66 (Zr-BDC MOF) in its hydroxylated and dehydroxylating forms is presented.
Journal ArticleDOI
Unusual and Highly Tunable Missing-Linker Defects in Zirconium Metal–Organic Framework UiO-66 and Their Important Effects on Gas Adsorption
Hui Wu,Hui Wu,Yong Shen Chua,Yong Shen Chua,Vaiva Krungleviciute,Vaiva Krungleviciute,Madhusudan Tyagi,Madhusudan Tyagi,Ping Chen,Taner Yildirim,Taner Yildirim,Wei Zhou,Wei Zhou +12 more
TL;DR: Using high-resolution neutron power diffraction technique, the first direct structural evidence is found showing that real UiO-66 material contains significant amount of missing-linker defects, an unusual phenomenon for MOFs.
Journal ArticleDOI
Tuning Selectivity of CO2 Hydrogenation Reactions at the Metal/Oxide Interface
TL;DR: A better understanding of the complex reaction network is provided, the capability of manipulating structure and combination of metal and oxide at the interface in tuning selectivity is grasped, and the key descriptors to control the activity and, in particular, the selectivity of catalysts are identified.
Journal ArticleDOI
Supported Catalysts for CO2 Methanation: A Review
TL;DR: In this paper, the authors present a critical overview of CO2 methanation catalyst production and research carried out in the last 50 years, including the fundamentals of reaction mechanism, catalyst deactivation, and catalyst promoters.
Journal ArticleDOI
A highly dispersed Pd-Mg/SiO2 catalyst active for methanation of CO2
TL;DR: In this article, a reverse microemulsion synthesis of palladium and magnesium in silica was used for CO2 methanation, and the Pd-Mg/SiO2 catalyst had greater than 95% selectivity to CH4 at a carbon dioxide conversion of 59%.