The optimization of Ni–Al2O3 catalyst with the addition of La2O3 for CO2–CH4 reforming to produce syngas

Mo, Wen‐Long; Ma, Fengyun; Ma, Yaya; Fan, Xing

doi:10.1016/j.ijhydene.2019.07.204

Cited by 64 publications

(35 citation statements)

References 51 publications

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“…The reduced Ni-La 2 O 3 /SiO 2 showed weak Ni peaks at 44.5 • and 51.7 • [44,45]. As shown in Table 1 [37]. The results indicate that La 2 O 3 was highly dispersed or amorphous in these catalytic systems.…”

Section: Characterization Of Fresh and Reduced Catalystsmentioning

confidence: 81%

“…It should be noted here that no La2O3 peak was found in any catalyst. This might be due to the very small La2O3 crystals formed not able to detect by XRD, or that the La2O3 was in the amorphous phase [37]. The results indicate that La2O3 was highly dispersed or amorphous in these catalytic systems.…”

Section: Characterization Of Fresh and Reduced Catalystsmentioning

confidence: 87%

“…As La 2 O 3 can promote CO 2 adsorption and activation [33]; Ni/La 2 O 3 [34,35] and La 2 O 3 promoted Ni-based catalysts [36][37][38][39] have shown excellent activity in the DRM reaction. However, due to the low specific surface area of La 2 O 3 , the main problem with Ni/La 2 O 3 catalysts is the poor dispersion of Ni [40,41], leading to carbon deposition on Ni/La 2 O 3 catalysts [40,41].…”

Section: Introductionmentioning

confidence: 99%

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Encapsulated Ni@La2O3/SiO2 Catalyst with a One-Pot Method for the Dry Reforming of Methane

Wang

Liu

et al. 2019

Catalysts

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Ni nanoparticles encapsulated within La 2 O 3 porous system (Ni@La 2 O 3 ), the latter supported on SiO 2 (Ni@La 2 O 3 )/SiO 2 ), effectively inhibit carbon deposition for the dry reforming of methane. In this study, Ni@La 2 O 3 /SiO 2 catalyst was prepared using a one-pot colloidal solution combustion method. Catalyst characterization demonstrates that the amorphous La 2 O 3 layer was coated on SiO 2 , and small Ni nanoparticles were encapsulated within the layer of amorphous La 2 O 3 . During 50 h of dry reforming of methane at 700 • C and using a weight hourly space velocity (WHSV) of 120,000 mL g cat −1 h −1 , the CH 4 conversion obtained was maintained at 80%, which is near the equilibrium value, while that of impregnated Ni-La 2 O 3 /SiO 2 catalyst decreased from 63% to 49%. The Ni@La 2 O 3 /SiO 2 catalyst exhibited very good resistance to carbon deposition, and only 1.6 wt% carbon was formed on the Ni@La 2 O 3 /SiO 2 catalyst after 50 h of reaction, far lower than that of 11.5 wt% deposited on the Ni-La 2 O 3 /SiO 2 catalyst. This was mainly attributed to the encapsulated Ni nanoparticles in the amorphous La 2 O 3 layer. In addition, after reaction at 700 • C for 80 h with a high WHSV of 600,000 mL g cat −1 h −1 , the Ni@La 2 O 3 /SiO 2 catalyst exhibited high CH 4 conversion rate, ca. 10.10 mmol g Ni −1 s −1 . These findings outline a simple synthesis method to prepare supported encapsulated Ni within a metal oxide porous structure catalyst for the dry reforming of methane reaction.

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Section: Characterization Of Fresh and Reduced Catalystsmentioning

confidence: 81%

Section: Characterization Of Fresh and Reduced Catalystsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Encapsulated Ni@La2O3/SiO2 Catalyst with a One-Pot Method for the Dry Reforming of Methane

Wang

Liu

et al. 2019

Catalysts

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“…The NiO with weak-medium interaction with the support corresponds to the reducible species between 623 K and 773 K. Stronger interaction (medium-strong) with the support for the Ni 2+ occurs in the range of 773 to 1023 K for the non-stoichiometric nickel aluminate (NiO-Al 2 O 3 ), the stoichiometric nickel aluminate species (NiAl 2 O 4 ) being harder to reduce. These are reducible from 1073 K having a strong interaction with the support [28,[45][46][47][48]. 1,8 The addition of noble metals, such as Ru, changes the reduction profiles of the Nicatalyst as reported in the literature [19,49,50].…”

Section: H 2 -Tpr Studiesmentioning

confidence: 91%

Effect of the Addition of Alkaline Earth and Lanthanide Metals for the Modification of the Alumina Support in Ni and Ru Catalysts in CO2 Methanation

et al. 2021

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In order to reduce greenhouse gas emissions, which are reaching alarming levels in the atmosphere, capture, recovery, and transformation of carbon dioxide emitted to methane is considered a potentially profitable process. This transformation, known as methanation, is a catalytic reaction that mainly uses catalysts based on noble metals such as Ru and, although with less efficiency, on transition metals such as Ni. In order to improve the efficiency of these conventional catalysts, the effect of adding alkaline earth metals (Ba, Ca, or Mg at 10 wt%) and lanthanides (La or Ce at 14 wt%) to nickel (13 wt%), ruthenium (1 wt%), or both-based catalysts has been studied at temperatures between 498 and 773 K and 10 bar pressure. The deactivation resistance in presence of H2S was also monitored. The incorporation of La into the catalyst produces interactions between active metal Ni, Ru, or Ru-Ni and the alumina support, as determined by the characterization. This fact results in an improvement in the catalytic activity of the 13Ni/Al2O3 catalyst, which achieves a methane yield of 82% at 680 K for 13Ni/14La-Al2O3, in addition to an increase in H2S deactivation resistance. Furthermore, 89% was achieved for 1Ru-13Ni/14La-Al2O3 at 651 K, but it showed to be more vulnerable to H2S presence.

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“…As a result, CO 2 can be chemisorbed on surface La 2 O 3 to generate oxidized carbonate (La 2 O 2 CO 3 ), which contributed to the elimination of the carbon deposition on the surface of the support (Khoja et al, 2020). Mo et al (2019) prepared La 2 O 3 -NiO-Al 2 O 3 catalysts promoted by La 2 O 3 with different loading amounts to improve the catalytic performance toward CRM reaction. It was found that the doping of La 2 O 3 could effectively promote the dispersion of metallic Ni and the carbon deposition over the catalyst surface was also further inhibited, accounting for the improved catalytic activity and stability.…”

Section: Rare-earth Metal Oxidesmentioning

confidence: 99%

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

Chen

et al. 2020

Front. Chem.

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CO 2 reforming of methane (CRM) can effectively convert two greenhouse gases (CO 2 and CH 4) into syngas (CO + H 2). This process can achieve the efficient resource utilization of CO 2 and CH 4 and reduce greenhouse gases. Therefore, CRM has been considered as a significantly promising route to solve environmental problems caused by greenhouse effect. Ni-based catalysts have been widely investigated in CRM reactions due to their various advantages, such as high catalytic activity, low price, and abundant reserves. However, Ni-based catalysts usually suffer from rapid deactivation because of thermal sintering of metallic Ni active sites and surface coke deposition, which restricted the industrialization of Ni-based catalysts toward the CRM process. In order to address these challenges, scientists all around the world have devoted great efforts to investigating various influencing factors, such as the option of appropriate supports and promoters and the construction of strong metal-support interaction. Therefore, we carefully summarized recent development in the design and preparation of Ni-based catalysts with advanced catalytic activity and enhanced anti-coke performance toward CRM reactions in this review. Specifically, recent progresses of Ni-based catalysts with different supports, additives, preparation methods, and so on, have been summarized in detail. Furthermore, recent development of reaction mechanism studies over Ni-based catalysts was also covered by this review. Finally, it is prospected that the Ni-based catalyst supported by an ordered mesoporous framework and the combined reforming of methane will become the future development trend.

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The optimization of Ni–Al2O3 catalyst with the addition of La2O3 for CO2–CH4 reforming to produce syngas

Cited by 64 publications

References 51 publications

Encapsulated Ni@La2O3/SiO2 Catalyst with a One-Pot Method for the Dry Reforming of Methane

Encapsulated Ni@La2O3/SiO2 Catalyst with a One-Pot Method for the Dry Reforming of Methane

Effect of the Addition of Alkaline Earth and Lanthanide Metals for the Modification of the Alumina Support in Ni and Ru Catalysts in CO2 Methanation

Recent Progresses in the Design and Fabrication of Highly Efficient Ni-Based Catalysts With Advanced Catalytic Activity and Enhanced Anti-coke Performance Toward CO2 Reforming of Methane

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