Catalytic performance and characterization of Ni-Fe catalysts for the steam reforming of tar from biomass pyrolysis to synthesis gas

Wang, Lei; Li, Dalin; Koike, Michio; Koso, Shuichi; Nakagawa, Yoshinao; Xu, Ya; Tomishige, Keiichi

doi:10.1016/j.apcata.2010.11.013

Cited by 321 publications

(218 citation statements)

References 51 publications

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“…This suggests that the watergas shift reaction (Equation 5), reforming and decomposition of hydrocarbons and oxygenated compounds (Equations 4 to 9) were possibly promoted with Ni-based catalysts, Fe-based catalysts and/or bimetallic Ni-Fe based catalysts 21,28,47,48 .…”

Section: Gas Concentrationmentioning

confidence: 99%

“…7 confirms the presence of amorphous and filamentous carbon on the surface of the used catalysts with a Ni:Fe ratio larger than 1 and there was almost no carbon deposition on the surface for the reacted catalysts with a Ni:Fe ratio smaller than 1. Wang et al 28 reported that one of the drawbacks of using Ni-based catalysts during steam reforming of biomass tar was carbon deposition on the surface of metallic Ni species, while Ni-Fe alloy species could resist the formation of coke. Therefore, they reported the addition of Fe suppressed the carbon deposition on the surface of the reacted catalyst.…”

Section: Gas Concentrationmentioning

confidence: 99%

“…Among them, Al2O3 is regarded as an effective support, in particular, in relation to the catalytic activity for hydrogen production and thermal stability 17,18 . The introduction of CeO2 to Ni-catalysts has been reported to enhance the catalytic performance, and the formation of the Ni-CeO2 nanocomposite was responsible for the better catalytic performance in terms of the prohibition of catalyst sintering and coke formation on the surface of the reacted catalysts 12,[18][19][20] 28 .…”

Section: Introductionmentioning

confidence: 99%

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Development of Fe-Promoted Ni–Al Catalysts for Hydrogen Production from Gasification of Wood Sawdust

Dong

Ling

et al. 2016

Energy Fuels

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ABSTRACT:The production of renewable hydrogen enriched gas from biomass waste is a promising technology for the development of a sustainable economy and society. Until now, there are still challenges of the technology in terms of the efficiency of hydrogen production. Catalyst is known and has been tested to enhance hydrogen production from biomass gasification. In particular using Ni-based catalysts, which have high reactivity for hydrogen production and are cost effective. However, developing a Ni-based catalyst with high thermal stability and resistance of coke deposition on the surface of the catalyst is still a challenging topic. In this work, Ni-Al catalysts doped with low-cost Fe metal were investigated for hydrogen enriched syngas production from gasification of biomass using a two-stage fixed bed reactor. NiOFe2O3-Al2O3 catalysts with various Ni:Fe molar ratios (9:1, 8:2, 6:4, 5:5, 4:6, 2:8 and 1:9) were studied aiming to understand the influence of Fe addition on the production of hydrogen and the catalyst stability in terms of coke deposition on surface. X-ray diffraction, temperature programme reduction and Transmission electron microscopy analysis of the fresh catalysts showed that nanoparticles (mainly NiAl2O4 spinel phase and Al2O3, ~5 nm) were identified in the catalysts. High dispersion of metal particles was obtained using a co-precipitation method of catalyst preparation. With the increase of Fe addition, hydrogen production was reduced from around 11 to 8 (mmol H2 g -1 biomass). However, the addition of Fe into the Ni-based catalyst significantly reduced the amount of coke deposited on the surface of the catalyst.H2/CO molar ratio was maximized to 1.28 when Ni:Fe molar ratio was 1:1. In addition, sintering of metal particles was not observed through the TEM analysis of the fresh and reacted catalysts.2

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Section: Gas Concentrationmentioning

confidence: 99%

Section: Gas Concentrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of Fe-Promoted Ni–Al Catalysts for Hydrogen Production from Gasification of Wood Sawdust

Dong

Ling

et al. 2016

Energy Fuels

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“…The variation further revealed that CeO2 addition enhanced the dispersion of catalyst active phases (Ni-Fe alloy) on the carrier. Previous studies uncovered that Ni-Fe alloys are successfully synthesized on the surface of catalyst support using nickel and iron as raw materials because nickel and iron atoms have a similar electronic orbit structure and metallic magnetism (Świerczyński et al 2007;Wang et al 2011;Pandey and Deo 2016). Therefore, the emerged broad diffraction peaks at 2 = 44.01° in these synthetic catalysts were due to the formation of Ni-Fe alloy phases.…”

Section: X-ray Diffraction Analysismentioning

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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“…Unlike popular Ni catalysts used in catalytic gasification and reforming, there are only limited research reports related to Fe catalysts in biomass gasification due to its relatively low catalytic activity. However, Fe was believed to be catalytically active for reducing heavy hydrocarbons in the gas product during the thermo-chemical process [33][34][35][36][37][38][39]. It has also been adopted as a stable and active catalyst for the water-gas shift reaction (WGSR) [40].…”

Section: Introductionmentioning

confidence: 99%

Catalytic steam reforming of volatiles released via pyrolysis of wood sawdust for hydrogen-rich gas production on Fe–Zn/Al2O3 nanocatalysts

Chen

Dong

et al. 2015

Fuel

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Abstract:Thermo-chemical processing of biomass is a promising alternative to produce renewable hydrogen as a clean fuel or renewable syngas for a sustainable chemical industry. However, the fast deactivation of catalysts due to coke formation and sintering limits the application of catalytic thermo-chemical processing in the emerging bio-refining industry. In this research, Fe-Zn/Al 2 O 3 nanocatalysts have been prepared for the production of hydrogen through pyrolysis catalytic reforming of wood sawdust. Through characterization, it was found that Fe and Zn were well distributed on the surface with a narrow particle size. During the reactions, the yield of hydrogen increased with the increase of Zn content, as Zn is an efficient metal promoter for enhancing the performance of the Fe active site in the reaction. The 20% Fe/Al 2 O 3 catalyst with Zn/Al ratio of 1:1 showed the best performance in the process in relation to the hydrogen production and resistance to coke formation on the surface of the reacted catalyst. All the catalysts showed ultra-high stability during the process and nearly no sintering were observed on the used catalysts. Therefore, the nanocatalysts prepared in this work from natural-abundant and low-cost metals have promising catalytic properties (high metal dispersion and stability) to produce H 2 -rich syngas with optimal H 2 /CO ratio from the thermo-chemical processing of biomass.

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Catalytic performance and characterization of Ni-Fe catalysts for the steam reforming of tar from biomass pyrolysis to synthesis gas

Cited by 321 publications

References 51 publications

Development of Fe-Promoted Ni–Al Catalysts for Hydrogen Production from Gasification of Wood Sawdust

Development of Fe-Promoted Ni–Al Catalysts for Hydrogen Production from Gasification of Wood Sawdust

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

Catalytic steam reforming of volatiles released via pyrolysis of wood sawdust for hydrogen-rich gas production on Fe–Zn/Al2O3 nanocatalysts

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