A Facile Fabrication of Supported Ni/SiO2 Catalysts for Dry Reforming of Methane with Remarkably Enhanced Catalytic Performance

Xu, Yan; Lin, Qiang; Liu, Bing; Jiang, Feng; Xu, Yuebing; Liu, Xiaohao

doi:10.3390/catal9020183

Cited by 17 publications

(14 citation statements)

References 41 publications

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“…As shown in Figure 5b, the H2/CO ratio is lower than one for both catalysts. This result is mainly due to the RWGS reaction and to a less degree to other side reactions [31], such as the reverse Boudouard reaction (C + CO2  2 CO) [49]. The CO and H2 yields are shown in Figure 5c,d, respectively.…”

Section: Catalytic Performance Studiesmentioning

confidence: 90%

“…The Ni@La 2 O 3 /SiO 2 catalyst displays a broad reduction peak at 615 • C, suggesting that Ni-based species have a strong interaction with the support [42,49]. Li et al [42] found that the small NiO particle confined into mesoporous La 2 O 3 strongly interacts with La 2 O 3 support, resulting in a high reduction temperature for NiO.…”

Section: Characterization Of Fresh and Reduced Catalystsmentioning

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: Catalytic Performance Studiesmentioning

confidence: 90%

Section: Characterization Of Fresh and Reduced Catalystsmentioning

confidence: 99%

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 sintering of nickel particles leads to the formation of particle aggregates, decreased activity, and enhanced carbon deposition. It was found that carbon deposits possess a greater tendency to deposit on Ni particles of a larger size [1,6,[9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Activity of Nickel and Ruthenium–Nickel Catalysts Supported on SiO2, ZrO2, Al2O3, and MgAl2O4 in a Dry Reforming Process

2019

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Dry reforming of methane (DRM) is an eco-friendly method of syngas production due to the utilization of two main greenhouse gases—methane and carbon dioxide. An industrial application of methane dry reforming requires the use of a catalyst with high activity, stability over a long time, and the ability to catalyze a reaction, leading to the needed a hydrogen/carbon monoxide ratio. Thus, the aim of the study was to investigate the effect of support and noble metal particles on catalytic activity, stability, and selectivity in the dry reforming process. Ni and Ni–Ru based catalysts were prepared via impregnation and precipitation methods on SiO2, ZrO2, Al2O3, and MgAl2O4 supports. The obtained catalysts were characterized using X-ray diffractometry (XRD), inductively coupled plasma optical emission spectrometry (ICP-OES), Brunauer–Emmett–Teller (BET) specific surface area, and elemental carbon-hydrogen-nitrogen-sulphur analysis (CHNS) techniques. The catalytic activity was investigated in the carbon dioxide reforming of a methane process at 800 °C. Catalysts supported on commercial Al2O3 and spinel MgAl2O4 exhibited the highest activity and stability under DRM conditions. The obtained results clearly indicate that differences in catalytic activity result from the dispersion, size of an active metal (AM), and interactions of the AM with the support. It was also found that the addition of ruthenium particles enhanced the methane conversion and shifted the H2/CO ratio to lower values.

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“…Modern civilization is confronted with two major challenges: dwindling energy resources [1,2] and global warming caused by greenhouse gases (mainly CH 4 and CO 2 ) [3,4]. The dry reforming of the methane (DRM) reaction for the conversion of greenhouse gases into a valuable synthesis gas (H 2 and CO) product is a potential contestant for confronting both these challenges simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Behaviour of Ce-Doped Ni Systems Supported on Stabilized Zirconia under Dry Reforming Conditions

et al. 2019

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Ni supported on bare and modified ZrO2 samples were synthesized using the incipient wet impregnation method. The t-ZrO2 phase was stabilized by incorporation of La2O3 into ZrO2. Moreover, the influence of CeO2-doping on the physico-chemical and catalytic properties under CO2 reforming conditions was probed. The characterization data of the investigated catalysts were obtained by using XRD, CO2/H2-TPD, BET, TPR, TPO, TGA, XPS and TEM characterization techniques. In the pristine Ni/Zr catalyst, the t-ZrO2 phase transformed into the monoclinic phase. However, upon support modification by La2O3, significant effects on the physicochemical properties were observed due to the monoclinic-to-tetragonal ZrO2 phase transformation also affecting the catalytic activity. As a result, superior activity on the La2O3 modified Ni/Zr catalyst was achieved, while no relevant change in the surface properties and activity of the catalysts was detected after doping by CeO2. The peculiar behavior of the Ni/La-ZrO2 sample was related to higher dispersion of the active phase, with a more pronounced stabilization of the t-ZrO2 phase.

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A Facile Fabrication of Supported Ni/SiO2 Catalysts for Dry Reforming of Methane with Remarkably Enhanced Catalytic Performance

Cited by 17 publications

References 41 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

Catalytic Activity of Nickel and Ruthenium–Nickel Catalysts Supported on SiO2, ZrO2, Al2O3, and MgAl2O4 in a Dry Reforming Process

Catalytic Behaviour of Ce-Doped Ni Systems Supported on Stabilized Zirconia under Dry Reforming Conditions

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