Support effects on the properties of Co and Ni catalysts for the hydrogen production from bio-ethanol partial oxidation

Kraleva, Elka; Sokolov, Sergey; Schneider, Mat­thias; Ehrich, Heike

doi:10.1016/j.ijhydene.2013.01.190

Cited by 26 publications

(16 citation statements)

References 23 publications

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“…Indeed, higher Ni loading results in a higher surface coverage with NiO species which are mostly converted to metallic Ni at 650 °C. The latter is known to facilitate hydrogen spillover and cause support reduction as demonstrated in our previous work [13].…”

Section: Redox Behavior Of the Catalystmentioning

confidence: 64%

“…The existence of larger particles on the surface of the catalyst is not favorable, as it causes nickel agglomeration and carbon formation on the catalyst, which affects the catalytic activity [19][20][21]. Interestingly, the NiO crystallite sizes of catalysts prepared with the citrate method were smaller than those synthesized by the impregnation method [13]. These small crystallites lead to high dispersion of the nickel species on the support surface, enhancing the catalytic performance during the partial oxidation of ethanol.…”

Section: Structure and Morphology Of The Catalystsmentioning

confidence: 99%

“…Dehydration was completed by drying the sample in a vacuum oven at 120 °C for 16 h followed by calcination at 450 °C for 2 h, then 500 °C for 5 h and finally 700 °C for 2 h under Air flow. The high calcination temperature was chosen to ensure structure stability of the catalyst within the temperature range used for ethanol partial oxidation [13]. The non-promoted binary mixed oxide named AlZn was prepared under identical conditions.…”

mentioning

confidence: 99%

“…In our previous studies we reported that nickel and cobalt catalysts supported on binary mixed oxides present high activity in the partial oxidation of ethanol and high selectivity to hydrogen and CO [13][14][15][16]. The most active catalyst was a Ni catalyst based on AlZnOx as support, a thermally stable mixed oxide with amphoteric character, prepared by a citrate sol-gel method.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Hydrogen production by bioethanol partial oxidation over Ni based catalysts

Kraleva

Pohl

Jürgensen

et al. 2015

Applied Catalysis B: Environmental

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Section: Redox Behavior Of the Catalystmentioning

confidence: 64%

Section: Structure and Morphology Of The Catalystsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Hydrogen production by bioethanol partial oxidation over Ni based catalysts

Kraleva

Pohl

Jürgensen

et al. 2015

Applied Catalysis B: Environmental

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“…The appearance of these peaks is ascribed to the Ni 2+ ĺNi 0 reduction [27,61] of the nickel oxide which has different interactions with the ZnO [47]. The appearance of a weak peak at 250°C for all samples except sample Ni/ZnO-C is attributed to surface free Ni species.…”

Section: H 2 -Tpr Measurementsmentioning

confidence: 92%

Remarkably high performance of clew-like ZnO superstructure in reactive adsorption desulfurization

Peng

Liu

et al. 2017

Sci. China Mater.

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In this study, a clew-like ZnO superstructure was synthesized by a copolymer-controlled self-assembly homogeneous precipitation method. Ni was impregnated to the clew-like ZnO superstructure to obtain Ni/ZnO adsorbents. The synthesized materials were characterized by scanning electron microscopy, transmission electron microscopy, N 2 sorption, X-ray diffraction, Fourier transform infrared spectrometry, and H 2 -temperature programmed reduction techniques. The reactive adsorption desulfurization (RADS) performance of the adsorbents was evaluated in a fixed bed reactor using thiophene in n-octane as a model fuel. Sample Ni/ZnO-4h exhibits a remarkably high performance with a sulfur capacity of 189.1 mg S g -1 , which is above 6 times that of the one prepared with commercial ZnO. Characterization results show that the morphology changes from micro-clews to large solid sticks with the increase of the crystallization time.The loose and open architecture of the clew-like ZnO superstructure facilitates the diffusion of reactants/products, and prevents the adsorbent particles from breakage by supplying space for the volume expansion during the RADS process. The small nanoparticles in ZnO nanostrips result in a high sulfur adsorption capacity and also favor the dispersion of Ni, leading to an excellent RADS performance.

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Ethanol Steam Reforming Followed by Water‐Gas Shift Reaction over Ce‐Ni/MCM‐41 and Fe‐Based Catalysts

Rahmanzadeh

Taghizadeh

2019

Chem Eng & Technol

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Current research focuses on hydrogen production from ethanol steam reforming (ESR) followed by water-gas shift (WGS) reaction. Ce-Ni/MCM-41 and Fe/Ce/M (where M = K, La, Ti) catalysts were prepared by the wet-impregnation technique and used for the ESR and WGS reactions, respectively. All experiments were carried out at 600°C. The effects of the reduction time, the ratio of the two catalysts, and their arrangement were also investigated. The best results were obtained using Fe/Ce/Ti as WGS catalyst and with a separate array because the H 2 production and CO 2 level in the product gas were improved while that of CO was reduced. To generate high-purity hydrogen, the CaO-based adsorbent was used as a third layer to adsorb CO 2 from the gaseous products.

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Support effects on the properties of Co and Ni catalysts for the hydrogen production from bio-ethanol partial oxidation

Cited by 26 publications

References 23 publications

Hydrogen production by bioethanol partial oxidation over Ni based catalysts

Hydrogen production by bioethanol partial oxidation over Ni based catalysts

Remarkably high performance of clew-like ZnO superstructure in reactive adsorption desulfurization

Ethanol Steam Reforming Followed by Water‐Gas Shift Reaction over Ce‐Ni/MCM‐41 and Fe‐Based Catalysts

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