Influence of supports on catalytic behavior of nickel catalysts in carbon dioxide reforming of toluene as a model compound of tar from biomass gasification

Kong, Meng; Fei, Jinhua; Wang, Shuai; Lu, W. T.; Zheng, Xiaoming

doi:10.1016/j.biortech.2010.09.054

Cited by 97 publications

(35 citation statements)

References 27 publications

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“…In addition, the small particle size and finely dispersed metal particles (from XRD results) derived from the interaction between metal and γ- Al 2 O 3 support (TPR analysis), were favorable for hydrogen production from waste plastics. This agreed well with those reports in the literature [40,49] in relation to the catalytic reforming of toluene and ethanol using Ni supported by alumina. In addition, the hydrogen content of the gas product over Fe based catalysts was higher than over Ni based catalysts, again indicating the effective performance of Fe for hydrogen production.…”

Section: Product Yield and Gas Compositionsupporting

confidence: 82%

Co-production of hydrogen and carbon nanotubes from real-world waste plastics: Influence of catalyst composition and operational parameters

Yao

Zhang

Williams

et al. 2018

Applied Catalysis B: Environmental

238

134

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A B S T R A C TThe use of Ni-Fe catalysts for the catalytic pyrolysis of real-world waste plastics to produce hydrogen and high value carbon nanotubes (CNT), and the influence of catalyst composition and support materials has been investigated. Experiments were conducted in a two stage fixed bed reactor, where plastics were pyrolysed in the first stage followed by reaction of the evolved volatiles over the catalyst in the second stage. Different catalyst temperatures (700, 800, 900°C) and steam to plastic ratios (0, 0.3, 1, 2.6) were explored to optimize the product hydrogen and the yield of carbon nanotubes deposited on the catalyst. The results showed that the growth of carbon nanotubes and hydrogen were highly dependent on the catalyst type and the operational parameters. Fe/ γ-Al 2 O 3 produced the highest hydrogen yield (22.9 mmol H 2 /g plastic ) and carbon nanotubes yield (195 mg g −1 plastic ) among the monometallic catalysts, followed by Fe/α-Al 2 O 3 , Ni/γ-Al 2 O 3 and Ni/α-Al 2 O 3 . The bimetallic Ni-Fe catalyst showed higher catalytic activity in relation to H 2 yield than the monometallic Ni or Fe catalysts because of the optimum interaction between metal and support. Further investigation of the influence of steam input and catalyst temperature on product yields found that the optimum simultaneous production of CNTs (287 mg g −1 plastic ) and hydrogen production (31.8 mmol H 2 /g plastic ) were obtained at 800°C in the absence of steam and in the presence of the bimetallic Ni-Fe/γ-Al 2 O 3 catalyst.

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Section: Product Yield and Gas Compositionsupporting

confidence: 82%

Co-production of hydrogen and carbon nanotubes from real-world waste plastics: Influence of catalyst composition and operational parameters

Yao

Zhang

Williams

et al. 2018

Applied Catalysis B: Environmental

238

134

View full text Add to dashboard Cite

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“…Introducing catalysts has been reported to increase hydrogen production and tar reduction during biomass gasification [6,7]. Ni-based catalysts have shown catalytic activity related to hydrogen production during biomass gasification process [8][9][10]; in addition, Ni-based catalysts are cost effective.…”

Section: Introductionmentioning

confidence: 99%

Nickel-catalysed pyrolysis/gasification of biomass components

Wang

Dupont

et al. 2013

Journal of Analytical and Applied Pyrolysis

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Hydrogen and syngas production have been investigated from the pyrolysis /gasification of biomass components (cellulose, xylan and lignin) in the presence of Ni-based catalysts by using a two-stage fixed-bed reaction system. Biomass samples were pyrolysed at the first stage and the derived products were gasified at the second stage. The Ni-Mg-Al and Ni-Ca-Al catalysts, prepared by co-precipitation, were applied in the gasification process.The lignin sample pyrolysed with more difficulty (56.0 wt.% of residue fraction) compared with cellulose and xylan at 500 °C, and therefore resulted in the lowest gas yield (42.7 wt.%) for the pyrolysis/gasification of lignin. However, the highest H 2 concentration from the three types of feedstock (55.1 vol.%) was collected for the lignin sample in the presence of steam and catalyst. Carbon deposition was barely observed from the TPO and SEM analysis of the reacted Ni-Mg-Al catalyst. The investigation of reaction conditions showed that water injection rate (0.02 and 0.05 g min -1 ) had little influence on the gas production from the pyrolysis/gasification of lignin in the presence of the Ni-Ca-Al catalyst; however, the increase of gasification temperature from 700 to 900 ˚C resulted in a higher gas and hydrogen production due to the promotion of secondary reactions during the gasification process.Furthermore, coking was highest for the reacted Ni-Ca-Al catalyst at the gasification temperature of 800 °C (7.27 wt.%), when the temperature was increased from 700 to 900 °C.This work shows that the components of biomass have a significant influence on the catalytic gasification process related to hydrogen and syngas production.

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“…It is suggested that smaller Ni particle size benefits the prohibition of coke formation on the surface of the catalyst. Kong et al 35 investigated toluene reforming by various nickel catalysts, and reported that a larger amount of coke deposition was obtained for the catalyst (Ni/ZrO2 and Ni/SiO2) with large Ni particle size (23.6, and 26.8 nm, respectively) compared with the Ni/Al2O3 and Ni/MgO catalysts with Ni particle sizes less than 10 nm. Small Ni particle size was also reported to prohibit coke formation on a Ni-based catalyst during steam methane reforming.…”

Section: Coke Formation On the Reacted Catalystsmentioning

confidence: 99%

Investigation of Ni/SiO2 catalysts prepared at different conditions for hydrogen production from ethanol steam reforming

Dupont

Nahil

et al. 2017

Journal of the Energy Institute

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Ni/SiO2 catalysts prepared by a sol-gel method have been investigated for hydrogen production via steam reforming of ethanol using a continuous flow, fixed bed reactor system. Chemical equilibrium calculations were also performed to determine the effects of temperature and molar steam to carbon ratio on hydrogen production. The acidity of the preparation solution (modified by nitric acid and ammonia) and calcination atmosphere (air and N2) were investigated in the preparation of the catalysts. BET surface area and porosity, temperature-programmed oxidation (TPO), X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were used to characterise the prepared catalysts. The BET surface area was reduced when the solution acidity was lowered during the sol-gel preparation process. A pH value less than 2.0 was necessary to achieve high metal dispersion in the catalyst. Smaller NiO particles were obtained when the catalyst was calcined in N2. Material balances on ethanol steam reforming at 600 C using the prepared Ni/SiO2 catalysts were determined, and higher hydrogen production with lower coke deposition on the reacted catalysts were also obtained from the catalysts calcined in N2 atmosphere.

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Influence of supports on catalytic behavior of nickel catalysts in carbon dioxide reforming of toluene as a model compound of tar from biomass gasification

Cited by 97 publications

References 27 publications

Co-production of hydrogen and carbon nanotubes from real-world waste plastics: Influence of catalyst composition and operational parameters

Co-production of hydrogen and carbon nanotubes from real-world waste plastics: Influence of catalyst composition and operational parameters

Nickel-catalysed pyrolysis/gasification of biomass components

Investigation of Ni/SiO2 catalysts prepared at different conditions for hydrogen production from ethanol steam reforming

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