Methanation of CO on Ru/graphitized-carbon catalysts: Effects of the preparation method and the carbon support structure

Truszkiewicz, Elżbieta; Kowalczyk, Karolina; Dębska, Aleksandra; Wojda, Damian; Iwanek, Ewa; Kępiński, Leszek; Mierzwa, Bogusław

doi:10.1016/j.ijhydene.2020.08.235

Cited by 20 publications

(17 citation statements)

References 61 publications

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“…However, it should be noted that the Ru3/C1 catalyst was not much more inferior to them in terms of the reaction rate, especially compared to Ru6/C2 (Figure 1a,c). The literature reports indicate an optimal size of ruthenium particles, guaranteeing the best properties in the catalytic hydrogenation of CO to methane [26,[32][33][34]. It seems that in our case, the size of the crystallites in the active phase is not the most important and only factor determining the activity of the system, despite the fact that it causes different electronic properties in very small Ru nanoparticles compared to larger ones [16].…”

Section: Co Chemisorptionmentioning

confidence: 57%

“…An increase in the activity of the Ru/C2 catalysts with time on stream may be attributed to the restructurization of small Ru particles (ordering of the crystal structure, faceting) to be more suitable for the structure-sensitive methanation reaction [25]. It may also be influenced by the functional groups on the surface of modified carbon materials [26]. It is generally known that they have a significant influence on the ruthenium reduction/oxidation state and the stabilization of its active, reduced form [27].…”

Section: Evaluation Of the Catalytic Performancementioning

confidence: 99%

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Stability of Ruthenium/Carbon Catalytic Materials during Operation in Carbon Monoxide Methanation Process

Truszkiewicz,

Latoszek,

Ojrzyńska

et al. 2023

Catalysts

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The stable activity of catalysts is an important characteristic, which determines their suitability for industrial applications. The purpose of this study was to investigate the stability of ruthenium systems deposited on carbon under conditions simulating long-term operation in CO methanation. Two series of Ru/carbon catalysts were prepared and studied during CO methanation in a hydrogen-rich gas stream. Two graphitized carbons substantially differing in their surface area (23 and 1457 m2/g) were used as supports, and Ru loadings of 3 and 6 wt.% were applied. The stability of Ru/C catalysts was examined in a 240 h time-on-stream test. The samples were characterized by CO chemisorption, XRD, TEM, Raman spectroscopy, TG–MS studies and CO-TPD. The stability of the catalysts over 240 h in the CO + H2 mixture depended on the support type and Ru loading. The highest CO conversion and increased activity was observed for both catalysts with Ru dispersion above 80%. The tested systems were also resistant to carbon deposition. Interestingly, a similar level of activity was obtained for 3 wt.% Ru supported on the low surface area carbon. It is presumed that the similar activity observed for systems with such different ruthenium dispersion is related to the presence of active sites of different strength and structure on the surface of both small and large Ru particles.

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Section: Co Chemisorptionmentioning

confidence: 57%

Section: Evaluation Of the Catalytic Performancementioning

confidence: 99%

Stability of Ruthenium/Carbon Catalytic Materials during Operation in Carbon Monoxide Methanation Process

Truszkiewicz,

Latoszek,

Ojrzyńska

et al. 2023

Catalysts

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“…It benefits from the graphitization of carrier carbon and the successful doping of N element, which improved the conductivity and electron transport capability of the composite material. 40 Compared with the monometallic Ru/NGC-550-2, the introduction of Co showed higher activity. It may be attributed to the existence of electron transfer between the Co–Ru bimetals and the interaction between the metal particles and the support to jointly promote the catalytic activity of the catalyst.…”

Section: Resultsmentioning

confidence: 96%

N-doped graphitized carbon supported Co@Ru core–shell bimetallic catalyst for hydrogen storage of N-ethylcarbazole

Qin

Bai

2022

Catal. Sci. Technol.

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“…The high stability of the catalyst was caused by the Ru nanoparticles embedded in these cavities ( Figure 3 ). Moreover, the partial graphitization of physical carbon enhances the conductivity and electron transfer ability of the support, which is conducive to the improvement of catalytic activity [ 107 , 108 ]. In order to achieve better catalytic hydrogenation performance, Wu et al [ 102 ] innovatively used rare-earth hydride as the hydrogenation catalyst carrier, and successfully developed a Ru/YH 3 -supported catalyst for the hydrogenation of NEC.…”

Section: Single-function Catalysts Of Lohcsmentioning

confidence: 99%

Heterogeneous Catalysts in N-Heterocycles and Aromatics as Liquid Organic Hydrogen Carriers (LOHCs): History, Present Status and Future

et al. 2023

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The continuous decline of traditional fossil energy has cast the shadow of an energy crisis on human society. Hydrogen generated from renewable energy sources is considered as a promising energy carrier, which can effectively promote the energy transformation of traditional high-carbon fossil energy to low-carbon clean energy. Hydrogen storage technology plays a key role in realizing the application of hydrogen energy and liquid organic hydrogen carrier technology, with many advantages such as storing hydrogen efficiently and reversibly. High-performance and low-cost catalysts are the key to the large-scale application of liquid organic hydrogen carrier technology. In the past few decades, the catalyst field of organic liquid hydrogen carriers has continued to develop and has achieved some breakthroughs. In this review, we summarized recent significant progress in this field and discussed the optimization strategies of catalyst performance, including the properties of support and active metals, metal–support interaction and the combination and proportion of multi-metals. Moreover, the catalytic mechanism and future development direction were also discussed.

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Methanation of CO on Ru/graphitized-carbon catalysts: Effects of the preparation method and the carbon support structure

Cited by 20 publications

References 61 publications

Stability of Ruthenium/Carbon Catalytic Materials during Operation in Carbon Monoxide Methanation Process

Stability of Ruthenium/Carbon Catalytic Materials during Operation in Carbon Monoxide Methanation Process

N-doped graphitized carbon supported Co@Ru core–shell bimetallic catalyst for hydrogen storage of N-ethylcarbazole

Heterogeneous Catalysts in N-Heterocycles and Aromatics as Liquid Organic Hydrogen Carriers (LOHCs): History, Present Status and Future

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