Low-temperature methanation of CO in coke oven gas using single nanosized Co3O4 catalysts

Zhu, Hongwei; Razzaq, Rauf; Jiang, Li; Li, Chunshan

doi:10.1016/j.catcom.2012.02.029

Cited by 62 publications

(35 citation statements)

References 19 publications

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“…The used catalyst (30 mg) just after drying at 100 • C for 2 h in an oven was heated from 50 to 900 • C at a rate of 10 • C/min under an air flow of 30 ml/min. [30]. These characteristic diffraction peaks of Co 3 O 4 can also include the crystal phases of CoAl 2 O 4 , which has almost identical diffraction peaks as Co 3 O 4 structures [31,32] but minimal formation at our pretreatment condition.…”

Section: Catalyst Characterizationsmentioning

confidence: 97%

Stabilized ordered-mesoporous Co3O4 structures using Al pillar for the superior CO hydrogenation activity to hydrocarbons

Ahn

Koo

et al. 2016

Applied Catalysis B: Environmental

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Section: Catalyst Characterizationsmentioning

confidence: 97%

Stabilized ordered-mesoporous Co3O4 structures using Al pillar for the superior CO hydrogenation activity to hydrocarbons

Ahn

Koo

et al. 2016

Applied Catalysis B: Environmental

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“…[11][12][13] Several studies have found that active oxygen sites (oxygen vacancies) can interact with active metals to improve the performances of the catalysts. 14,15 Thus, CeO 2 -ZrO 2 solid solution can be used as support for CO 2 methanation catalysts. Ni-based catalysts supported on Ce x Zr 12x O 2 mixed oxides prepared by the sol-gel method have been previously investigated for CO 2 methanation.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts

Zhu

Razzaq

et al. 2013

AIChE Journal

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A series of active oxygen material Ce x Zr 12x O 2 -supported NiACo bimetallic nanosized catalysts were prepared by coprecipitation method, which is simple and fit for industrial use with lower cost than other methods. The effect of CeO 2 / ZrO 2 mole ratio, Co metal addition, and PEG-6000 addition were investigated. The catalysts were characterized through X-ray diffraction, H 2 thermal-programmed reduction, N 2 adsorption, Raman spectroscopy, CO pulse chemisorption, X-ray photoelectron spectroscopy, oxygen storage capacity, and transmission electron microscopy-energy dispersive X-ray analysis. Modifications of the structural and redox properties of these materials were evaluated in relation to their catalytic performances. Particularly, the relationship between the active oxygen sites of the catalysts and their catalytic performances was investigated. The interaction between active metals (Ni and Co) and Ce x Zr 12x O 2 support was found to be very important for catalytic performance. The active oxygen site of Ce x Zr 12x O 2 can considerably improve catalytic performance. Appropriate Co metal addition also remarkably enhanced the catalytic stability and activity. Moreover, PEG-6000 addition can improve the Brunauer-Emmett-Teller surface area and active metal dispersion of catalysts to improve their performances. The nanosized catalyst 15 wt % Ni-5 wt % Co/Ce 0.25 Zr 0.75 O 2 prepared by adding 5 wt % PEG-6000 achieved almost 85% CO 2 conversion and 98% selectivity to methane at 280 C when the gas hourly space velocity was 10,000 h 21 .

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“…XRD patterns of the fresh P/m-CoAl showed the characteristic spinel-type Co 3 O 4 crystalline phases appeared at 2θ = 19.0, 31.3, 36.9, 38.5, 44.8, 55.7, 59.4 and 65.2°as shown in Figure 1(B), which respectively correspond to the crystalline Co 3 O 4 planes of (111), (220), (311), (222), (400), (422), (511) and (440). [5,27] There were no characteristic peaks of phosphorousderived chemical species due to its smaller contents on the P/ m-CoAl. The calculated crystallite sizes of the Co 3 O 4 using the most intense peak at 2θ = 36.9°were found to be in the range of 11.7-12.5 nm with small variations, which can be originated from the grain size of the Co 3 O 4 À Al 2 O 3 frameworks.…”

Section: Bulk and Surface Properties Of P/m-coal Catalystsmentioning

confidence: 99%

Ordered Mesoporous Co₃O₄−Al₂O₃Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability

Park

Lee

et al. 2019

ChemCatChem

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The synergy effects of phosphorus modifier on highly ordered mesoporous binary metal oxides of Co 3 O 4 À Al 2 O 3 (m-CoAl), prepared by nanocasting method using a hard template of KIT-6, were observed by an enhanced catalytic and structural stability of the m-CoAl during CO hydrogenation to hydrocarbons. The enhanced structural stability of the ordered mesoporous structures on the phosphorous-modified m-CoAl at an optimal amount of phosphorous modifier below 0.3 wt%P (P (3)/m-CoAl) was attributed to the partial formation of thermally stable metal phosphates under a reductive Fischer-Tropsch synthesis (FTS) reaction condition. The positive effects of the phosphorous modifier were originated from the partially formed SiO 2 -like AlPO 4 phases on the outer surfaces of the m-CoAl, as well as from partially formed irreducible and thermally stable spinel-type cobalt aluminates (CoAl 2 O 4 ). The hydrophobic SiO 2 -like tridymite AlPO 4 surfaces on the ordered matrices of the P/m-CoAl also effectively prevented the heavy wax (or coke precursors) depositions. The structural instability of the P/m-CoAl was observed at a higher phosphorous content above 0.5wt%P by preferentially forming the largely segregated mixed metal oxides such as Co 3 O 4 À CoAl 2 O 4 À Co 3 (PO 4 ) 2 through the phase transformations of the surface excess AlPO 4 .

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Low-temperature methanation of CO in coke oven gas using single nanosized Co3O4 catalysts

Cited by 62 publications

References 19 publications

Stabilized ordered-mesoporous Co3O4 structures using Al pillar for the superior CO hydrogenation activity to hydrocarbons

Stabilized ordered-mesoporous Co3O4 structures using Al pillar for the superior CO hydrogenation activity to hydrocarbons

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts

Ordered Mesoporous Co₃O₄−Al₂O₃Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability

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Low-temperature methanation of CO in coke oven gas using single nanosized Co3O4 catalysts

Cited by 62 publications

References 19 publications

Stabilized ordered-mesoporous Co3O4 structures using Al pillar for the superior CO hydrogenation activity to hydrocarbons

Stabilized ordered-mesoporous Co3O4 structures using Al pillar for the superior CO hydrogenation activity to hydrocarbons

Catalytic Methanation of Carbon Dioxide by Active Oxygen Material CexZr1−xO2 Supported NiCo Bimetallic Nanocatalysts

Ordered Mesoporous Co3O4−Al2O3Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability

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Catalytic Methanation of Carbon Dioxide by Active Oxygen Material Ce_xZr_1−xO₂ Supported NiCo Bimetallic Nanocatalysts

Ordered Mesoporous Co₃O₄−Al₂O₃Binary Metal Oxides for CO Hydrogenation to Hydrocarbons: Synergy Effects of Phosphorus Modifier for an Enhanced Catalytic Activity and Stability