Effect of Co, Fe and Rh addition on coke deposition over Ni/Ce0.5Zr0.5O2 catalysts for steam reforming of ethanol

Chiou, Josh Y.Z.; Lai, Chin Liang; Yu, Shen-Wei; Huang, Hsin-Hua; Chuang, Chen-Lung; Wang, Chen-Bin

doi:10.1016/j.ijhydene.2014.07.141

Cited by 34 publications

(21 citation statements)

References 48 publications

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“…8d. Thus, the formation of carbon deposition and the caking of catalysts were inhibited by adding CeO2 (Chiou et al 2014;Vicente et al 2014) because it was well known that CeO2 has unique redox properties and high oxygen vacancy and mobility, which can promote the gasification of carbonaceous species deposited on a catalyst (Perrichon et al 1994;Zhang et al 2014;Li et al 2015). Figures 8c and 8d also showed that some spherical particles were attached on the surface of catalysts after reaction, wherein the particles attached on the surface of NF/C0.4PG0.6 catalyst were in a more uniform distribution than those attached on NF/PG.…”

Section: Characterizations Of Spent Catalystsmentioning

confidence: 99%

Hydrogen Production from Steam Reforming of Acetic Acid over Ni-Fe/Palygorskite Modified with Cerium

Wang¹,

Chen²,

Yang³

et al. 2017

BioResources

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The steam reforming of acetic acid (SRA) was carried out in a fixed-bed tubular reactor with Ni-Fe/ceria-palygorskite (CPG) catalysts. The asprepared catalysts were analyzed by N2 adsorption-desorption, scanning electron microscopy coupled with energy dispersive spectroscopy (SEM-EDS), H2 temperature programmed reduction (H2-TPR), and X-ray diffraction (XRD). The results of H2-TPR and XRD showed that the addition of CeO2 increased the hydrogen consumption of catalysts and the interaction force between active component (Ni-Fe alloy) and carrier. Moreover, the Ni-Fe alloys were successfully synthesized in the Ni-Fe/CPG catalysts and their crystallite sizes were decreased by adding CeO2. In addition, these catalysts were employed to SRA at 600 °C, GHSV = 14427 h -1 and different molar ratio of S/C. The experimental results revealed that the Ni-Fe/C0.4PG0.6 catalyst can achieve the highest yield of H2 (87%) and HOAc conversion (95%), as well as the highest stability during the process of steam SRA. Additionally, the spent catalysts were characterized by XRD, SEM, and thermogravimetric analysis (TGA). The results showed that the addition of CeO2 enhanced the stability and activity of Ni-Fe/palygorskite catalyst and reduced the coke deposition rate on the catalyst surface.

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Section: Characterizations Of Spent Catalystsmentioning

confidence: 99%

Hydrogen Production from Steam Reforming of Acetic Acid over Ni-Fe/Palygorskite Modified with Cerium

Wang¹,

Chen²,

Yang³

et al. 2017

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“…As for the effect of Rh, Chiou et al compared the reforming performance of Ni/Ce 0.5 Zr 0.5 O 2 (Ni loading 5 wt%) and Ni‐Rh/ Ce 0.5 Zr 0.5 O 2 (Ni loading 5 wt% and Rh loading 1 wt%) catalysts. The bimetallic catalysts were prepared by the coimpregnation method.…”

Section: Reforming Catalystsmentioning

confidence: 99%

“…TEM images of the used (a) Ni/Ce 0.5 Zr 0.5 O 2 , and (b) Ni‐Rh/ Ce 0.5 Zr 0.5 O 2 catalysts (teprinted with permission from ).…”

Section: Reforming Catalystsmentioning

confidence: 99%

A survey of nickel-based catalysts and monolithic reformers of the onboard fuel reforming system for fuel cell APU applications

Liu

2016

Int. J. Energy Res.

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Summary This paper presented a detailed survey of the catalysts for fuel reforming, including nickel‐based catalysts with alkalis, alkaline earths, rare earths, noble metals, and hydrotalcite‐type precursors. All these additions can enhance the Ni catalysts in regarding with activity, coke resistivity, and sintering resistivity. Smaller Ni particle size, more even particle dispersion, and less free NiO and NiAl2O4 can be obtained with these additions. Physicochemical characterization, activity, stability, coke resistance, and the effects of different precursors were summarized and compared. Development of the most commonly used monolithic reformer was also summarized, and different reformer configurations were presented chronologically. Homogeneous mixing of the completely evaporated fuel with air and steam, as well as uniform distribution of the mixture flow are the two main concerns in reformer design. Reforming energy conversion efficiency around 80%, power density above 3 kW/L, and specific power above 3 kW/kg are also reported in the most recent monolithic reformer. Copyright © 2016 John Wiley & Sons, Ltd.

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“…to reduce the harshness of the reaction conditions, and to increase the catalyst stability [29,30,[54][55][56]. To achieve these requirements of Ni-based catalysts, various synthesis methods (a single-step epoxide-driven sol-gel method, nanoparticles encapsulated with multilayered graphene, a single-step evaporation-induced self-assembly (EISA), and co-impregnation of metallic precursors on a xerogel support) have been developed [28,[57][58][59][60][61][62][63][64][65][66].…”

Section: Introductionmentioning

confidence: 99%

Effect of Supports and Promoters on the Performance of Ni‐Based Catalysts in Ethanol Steam Reforming

et al. 2020

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Ethanol steam reforming (ESR) is one of the potential processes to convert ethanol into valuable products. Hydrogen produced from ESR is considered as green energy for the future and can be an excellent alternative to fossil fuels with the aim of mitigating the greenhouse gas effect. The ESR process has been well studied, using transition metals as catalysts coupled with both acidic and basic oxides as supports. Among various reported transition metals, Ni is an inexpensive material with activity comparable to that of noble metals, showing promising ethanol conversion and hydrogen yields. Additionally, different promoters and supports were utilized to enhance the hydrogen yield and the catalyst stability. This review summarizes and discusses the influences of the supports and promoters of Ni‐based catalysts on the ESR process.

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Effect of Co, Fe and Rh addition on coke deposition over Ni/Ce0.5Zr0.5O2 catalysts for steam reforming of ethanol

Cited by 34 publications

References 48 publications

Hydrogen Production from Steam Reforming of Acetic Acid over Ni-Fe/Palygorskite Modified with Cerium

Hydrogen Production from Steam Reforming of Acetic Acid over Ni-Fe/Palygorskite Modified with Cerium

A survey of nickel-based catalysts and monolithic reformers of the onboard fuel reforming system for fuel cell APU applications

Effect of Supports and Promoters on the Performance of Ni‐Based Catalysts in Ethanol Steam Reforming

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