La-promoted Ni/Mg-Al catalysts with highly enhanced low-temperature CO2 methanation performance

Zhang, Lijuan; Bian, Li; Zhu, Ziting; Li, Zhenhua

doi:10.1016/j.ijhydene.2017.12.082

Cited by 79 publications

(60 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The activity of the NiMgAl and Ni/SiC catalysts are in accordance with the results reported in the literature under similar reaction conditions . The activity of the NiMgAl/SiC catalyst is comparable with that over the reported Ni‐based catalysts with a promoter or a second metal . Furthermore, CH 4 selectivity decreased slightly with the reaction temperature and little difference was observed over various catalysts.…”

Section: Resultssupporting

confidence: 90%

“…In principle, the reduction temperature in H 2 ‐TPR profiles reflects the strength of metal‐support interactions over the investigated catalyst. A high reduction temperature corresponds to a strong metal‐support interaction . As shown in Fig.…”

Section: Resultsmentioning

confidence: 91%

“…The metal‐support interactions would influence the reducibility of the catalysts accordingly . The data of H 2 pulse chemisorption revealed that the active surface area of Ni on the NiMgAl/SiC, NiMgAl and Ni/SiC catalysts was 13.2, 8.3 and 4.2 m 2 /gcat, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…However, the NiMgAl catalysts directly derived from the hydrotalcite precursors cannot deliver satisfactory low‐temperature methanation activity. To solve this problem, proper promoters (such as La, Ce and Zr) or a second metal (such as Co and Fe) have been introduced . Another strategy to improve the catalytic performance of the hydrotalcite‐derived catalysts is to combine the hydrotalcite precursor with another substrate to form the composite catalysts, which may tune the metal‐support interactions, metal reducibility and other properties of the catalysts .…”

Section: Introductionmentioning

confidence: 99%

“…To solve this problem, proper promoters (such as La, Ce and Zr) or a second metal (such as Co and Fe) have been introduced. [17][18][19] Another strategy to improve the catalytic performance of the hydrotalcite-derived catalysts is to combine the hydrotalcite precursor with another substrate to form the composite catalysts, which may tune the metal-support interactions, metal reducibility and other properties of the catalysts. 20,21 For example, Zhang's group reported highly efficient Ni-based catalysts by integrating NiMgAl structure with SiO 2 coating.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts

Wang

Liu

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Background Carbon dioxide (CO2) methanation is an important reaction in energy and environmental fields, which aims to convert CO2 into natural gas with hydrogen (H2) from renewable sources. One of the technical bottlenecks for CO2 methanation is the lack of feasible catalysts, especially the ones with satisfactory low‐temperature activity. Results The NiMgAl/SiC composite catalyst that was derived from hydrotalcite precursor on the SiC substrate possessed enhanced low‐temperature activity and excellent long‐term stability in CO2 methanation. For the low‐temperature activity, CO2 conversion reached 63.8% and 74.5% at 300 and 325 °C respectively. For the long‐term stability, CO2 conversion merely decreased from 78.4% to 76.9% after 50 h of reaction at 400 °C. Conclusion The NiMgAl/SiC composite catalyst was successfully synthesized by the co‐precipitation method, which exhibited enhanced low‐temperature methanation activity compared with the NiMgAl and Ni/SiC catalysts. The superior low‐temperature activity was mainly ascribed to two structural parameters. One was the small nickel (Ni) nanoparticle size, which was endowed by the unique structure of the hydrotalcite precursor. The other one was the high reducibility of Ni species, which was rendered by the appropriate metal‐support interactions. The present work provides guidelines for the synthesis of highly efficient composite catalysts for energy and environmental applications. © 2019 Society of Chemical Industry

show abstract

Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts

Wang

Liu

et al. 2019

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

Comparing Co‐catalytic Effects of ZrO_x, SmO_x, and Pt on CO_x Methanation over Co‐based Catalysts Prepared by Double Flame Spray Pyrolysis

et al. 2021

View full text Add to dashboard Cite

The impact of different co‐catalytically acting promoters (Pt, ZrOx and SmOx) during COx methanation was investigated on alumina supported Co‐based model catalysts. To obtain samples with identical structure and morphology independent of the presence and the type of promoter added, double flame spray pyrolysis was employed for the synthesis, which, in contrast to classical catalyst preparation techniques, allows controlling and separating the particle formation processes of the different catalyst components. In this way, differently promoted and unpromoted catalysts with identical size distributions and dispersions could be synthesized to study co‐catalytic effects in isolation. For CO2 methanation, all promoters led to improved methanation yields and long‐term activities within the whole temperature range as compared to the unpromoted catalyst. Among them, zirconia and platinum performed best. In case of CO methanation, a beneficial influence of the studied promoters could also be verified – with Pt showing the best results. Yet, all catalysts deactivated rapidly above 310 °C, limiting their usability to lower temperatures.

show abstract

Improving Low‐Temperature CO₂ Methanation by Promoting Ni‐Al LDH‐Derived Catalysts with Alkali Metals

Dias,

Bernardi,

Perez‐Lopez

2023

ChemCatChem

View full text Add to dashboard Cite

Fossil fuels depletion and environmental impacts caused by greenhouse gas emissions such as CO2 are significant issues to secure the nature preservation within a sustainable economy. CO2 methanation is a promising process to mitigate CO2 emissions and reuse it to produce CH4, serving as fuel, chemical feedstock, and energy source. A series of LDH‐derived Ni‐Al catalysts promoted by Li, Mg, Ca, and La were prepared via the co‐precipitation method. Characterization by N2 physisorption, X‐ray diffraction (XRD) and photoelectron spectroscopy (XPS), as well as thermal techniques as temperature programmed reduction (H2‐TPR), desorption (CO2‐TPD, H2‐TPD), and oxidation (TPO) analyses were performed. Low‐temperature catalytic tests (200‐400 °C) revealed that alkali metal modification improves performance even at 200 °C, where Ni55Ca11Al33 catalyst achieved 74% CO2 conversion with 100 % CH4 selectivity by enhancing basicity and metal‐support interaction, high Ni dispersion and small crystallite sizes, providing proper sites to adsorb and activate CO2. Moreover, the catalysts presented excellent resistance to deactivation, maintaining high stability during 10 h on stream. These results prove that Ni‐Al mixed oxides, LDH‐derived catalysts performances can be further improved by incorporating alkali metals into less energy‐spending, low‐temperature CO2 methanation processes.

show abstract

La-promoted Ni/Mg-Al catalysts with highly enhanced low-temperature CO2 methanation performance

Cited by 79 publications

References 47 publications

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts

Comparing Co‐catalytic Effects of ZrO_x, SmO_x, and Pt on CO_x Methanation over Co‐based Catalysts Prepared by Double Flame Spray Pyrolysis

Improving Low‐Temperature CO₂ Methanation by Promoting Ni‐Al LDH‐Derived Catalysts with Alkali Metals

Contact Info

Product

Resources

About

La-promoted Ni/Mg-Al catalysts with highly enhanced low-temperature CO2 methanation performance

Cited by 79 publications

References 47 publications

Enhanced low‐temperature activity for CO2 methanation over NiMgAl/SiC composite catalysts

Enhanced low‐temperature activity for CO2 methanation over NiMgAl/SiC composite catalysts

Comparing Co‐catalytic Effects of ZrOx, SmOx, and Pt on COx Methanation over Co‐based Catalysts Prepared by Double Flame Spray Pyrolysis

Improving Low‐Temperature CO2 Methanation by Promoting Ni‐Al LDH‐Derived Catalysts with Alkali Metals

Contact Info

Product

Resources

About

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts

Enhanced low‐temperature activity for CO₂ methanation over NiMgAl/SiC composite catalysts

Comparing Co‐catalytic Effects of ZrO_x, SmO_x, and Pt on CO_x Methanation over Co‐based Catalysts Prepared by Double Flame Spray Pyrolysis

Improving Low‐Temperature CO₂ Methanation by Promoting Ni‐Al LDH‐Derived Catalysts with Alkali Metals