The effect of promoters in La 0.9 M 0.1 Ni 0.5 Fe 0.5 O 3 (M = Sr, Ca) perovskite catalysts on dry reforming of methane

Yang, Eun-Hyeok; Noh, Young-su; Ramesh, Sreerangappa; Lim, Sung Soo; Moon, Dong Ju

doi:10.1016/j.fuproc.2015.02.023

Cited by 85 publications

(38 citation statements)

References 38 publications

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“…This technique has been extensively studied in recent years as a sustainable technique for synthesizing a wide variety of catalysts through the use of LaCoO 3 [15,16], LaFeO 3 [16][17][18][19][20][21][22][23][24][25][26][27], LaNiO 3 [2,5,[28][29][30] or their mixtures as precursor materials.…”

Section: Introductionmentioning

confidence: 99%

Exsolution of Re-alloy catalysts with enhanced stability for methane dry reforming

Zubenko

Singh

Rosen

2017

Applied Catalysis B: Environmental

108

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The valorization of natural gas is a highly important process which could enable the production of hydrogen or clean synthetic fuels. Methane reforming with carbon dioxide provides an environmentally friendly route for methane conversion to synthesis gas while consuming two greenhouse gasses. Large-scale implementation of this process has been stalled by the lack of stable catalysts owing to variety of deactivation mechanisms such as carbon accumulation (coking) and sintering. We created doped perovskite precursors based on lanthanum ferrite (LaFeO 3) and subsequently doped them with Ni and Re phases. Under reducing conditions, these composite precursors exsolved Re-alloy nanoparticles which were found to be active and stable under dry reforming conditions. The solid-phase crystallization process was studied by in-situ synchrotron XRD, and compared to the temperature programmed reduction of each precursor. No carbon accumulation or nanoparticle sintering was observed after 70 hours of operation. Furthermore, the evaporation of catalytic Re phases, a major problem under reforming conditions, was shown to be completely blocked due to strong catalyst-support interactions imbued by this synthesis technique.

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Section: Introductionmentioning

confidence: 99%

Exsolution of Re-alloy catalysts with enhanced stability for methane dry reforming

Zubenko

Singh

Rosen

2017

Applied Catalysis B: Environmental

108

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“…The high‐temperature peak was accompanied by the production of La 2 O 3 and the reduction of Ni 2+ to Ni 0 , as follows 48,50 :

{La}_{2} {Ni}_{2} O_{5} + {2H}_{2} \to {La}_{2} O_{3} + 2Ni + {2H}_{2} normalO

…”

Section: Resultsmentioning

confidence: 99%

Dry reforming of methane by La_0.₅Sr₀_.₅NiO₃ perovskite oxides: influence of preparation method on performance and structural features of the catalysts

Mousavi

Pour

Gholizadeh

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: The dry reforming of methane (DRM) process has received considerable attention for the production of syngas owing to its great environmental and economic benefits. LaNiO 3 and La 0.5 Sr 0.5 NiO 3 nanoparticles were synthesized with the coprecipitation procedure using distilled and magnetic distilled water, and examined as catalysts in DRM. RESULTS: The structure and morphology of the prepared nanoparticles were characterized by X-ray diffraction, the Brunauer-Emmett-Teller method, scanning and transmission electron microscopy, and temperature-programmed reduction, desorption and hydrogenation techniques. The experimental results proved that the treated La 0.5 Ni 0.5 SrO 3 catalyst had better initial performance in DRM in comparison with the LaNiO 3 catalyst, due to its greater surface basicity. The orientation for deposition of carbon over the surface of the consumed catalysts was as follows: La 0.5 Sr 0.5 NiO 3 treated > La 0.5 Sr 0.5 NiO 3 non-treated > LaNiO 3 nontreated > LaNiO 3 treated. CONCLUSION: Among the synthesized catalysts, the treated La 0.5 Sr 0.5 NiO 3 sample exhibited higher initial DRM activity, due to its greater surface basicity. Also, the higher surface basicity of the strontium-substituted catalyst led to an increase in CO 2 desorption and coke deposition according to the Boudouard reaction.

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“…For play down the coke formation, various parameters such as the addition of promoters of alkaline oxides or alkaline-earth metals and highly dispersed nickel species on the support have been investigated [15][16][17]. According to studies [18][19][20][21], an attractive option is the use of perovskite-type precursors which are capable of producing well-dispersed metallic particles upon reduction treatment diminishing coke formation and increasing the activity and stability of the catalyst. Other advantages of perovskite-type oxides (ABO3) are thermal stability, ease to synthesize, low cost and high composition flexibility due to the partial substitution of A and/or B cations [19].…”

Section: Introductionmentioning

confidence: 99%

“…According to studies [18][19][20][21], an attractive option is the use of perovskite-type precursors which are capable of producing well-dispersed metallic particles upon reduction treatment diminishing coke formation and increasing the activity and stability of the catalyst. Other advantages of perovskite-type oxides (ABO3) are thermal stability, ease to synthesize, low cost and high composition flexibility due to the partial substitution of A and/or B cations [19]. The cation A is responsible for the thermal resistance of the catalyst whereas the cation B is responsible for the catalytic performance.…”

Section: Introductionmentioning

confidence: 99%

CO2 reforming of CH4 over M(Ca, Ba, Sr)xLa1-xNiO3 perovskites used as coke resistant catalyst precursor

Trevisani

Batista

2021

CI&CEQ

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Methane (CH4) and carbon dioxide (CO2) are greenhouse gases that have been converted into synthesis gas for the production of oxygenated chemicals and hydrocarbons. In this paper, M(Ca, Ba, Sr)xLa1-xNiO3 (x=0.0, 0.3 and 0.5) doped perovskites were successfully synthesized as catalyst precursors aiming at high catalytic activity and stability in the CO2 reforming of methane. These perovskites were characterized by X-ray diffraction (XRD), temperature programmed reduction by H2 (H2-TPR) and O2-temperature programmed oxidation (TPO). Its activity and carbon suppression were investigated in the CO2 reforming of methane. Results showed formation of perovskite structure, but La2NiO4 spinel and NiO were also detected in doped perovskites. The Ca, Ba and Sr partial substitution has evident influence on the reduction behavior of perovskites. All the doped perovskites used as catalyst precursors had better catalytic performance than LaNiO3. However, increasing the doping content decreased activity. Among doped perovskites, Ca0.3La0.7NiO3 showed better catalytic performance for the methane reforming reaction.

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The effect of promoters in La 0.9 M 0.1 Ni 0.5 Fe 0.5 O 3 (M = Sr, Ca) perovskite catalysts on dry reforming of methane

Cited by 85 publications

References 38 publications

Exsolution of Re-alloy catalysts with enhanced stability for methane dry reforming

Exsolution of Re-alloy catalysts with enhanced stability for methane dry reforming

Dry reforming of methane by La_0.₅Sr₀_.₅NiO₃ perovskite oxides: influence of preparation method on performance and structural features of the catalysts

CO2 reforming of CH4 over M(Ca, Ba, Sr)xLa1-xNiO3 perovskites used as coke resistant catalyst precursor

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The effect of promoters in La 0.9 M 0.1 Ni 0.5 Fe 0.5 O 3 (M = Sr, Ca) perovskite catalysts on dry reforming of methane

Cited by 85 publications

References 38 publications

Exsolution of Re-alloy catalysts with enhanced stability for methane dry reforming

Exsolution of Re-alloy catalysts with enhanced stability for methane dry reforming

Dry reforming of methane by La0.5Sr0.5NiO3 perovskite oxides: influence of preparation method on performance and structural features of the catalysts

CO2 reforming of CH4 over M(Ca, Ba, Sr)xLa1-xNiO3 perovskites used as coke resistant catalyst precursor

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Dry reforming of methane by La_0.₅Sr₀_.₅NiO₃ perovskite oxides: influence of preparation method on performance and structural features of the catalysts