Preparation of nickel-mesoporous materials and their application to the hydrodechlorination of chlorinated organic compounds

Kim, Pil; Kim, Younghun; Kang, Taewook; Song, In Kyu; Yi, Jongheop

doi:10.1007/s10563-007-9017-1

Cited by 12 publications

(9 citation statements)

References 87 publications

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“…From Table 1 it is observed that relatively high mesoporous volumes around 0.6 and 0.5cm 3 g -1 were obtained from the DR calculation method for the 20 and 40wt.% Ni loadings respectively; it has been reported that mesoporous materials tend to have ordered pore structures with narrow pore size distribution, high surface area and large pore volumes [41].…”

Section: Bet Analysis Of Fresh Catalystsmentioning

confidence: 97%

Characterization and evaluation of Ni/SiO2 catalysts for hydrogen production and tar reduction from catalytic steam pyrolysis-reforming of refuse derived fuel

Blanco

Onwudili

et al. 2013

Applied Catalysis B: Environmental

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A series of Ni/SiO 2 catalysts have been prepared and investigated for their suitability for hydrogen production and tar reduction in a two-stage pyrolysis-reforming system, using refuse derived fuel (RDF) as the raw material. Experiments were conducted at a pyrolysis temperature of 600 ºC, and a reforming temperature of 800 ºC. The product gases were analysed by gas chromatography (GC) and the condensed fraction was collected and quantified using gas chromatography-mass spectrometry (GC-MS). The effects of the catalyst preparation method, nickel content and the addition of metal promoters (Ce, Mg, Al), were investigated. Catalysts were characterised using BET surface area analysis, temperature programmed oxidation (TPO), and scanning electron microscopy (SEM). The TPO and SEM analysis of the reacted catalysts showed that amorphous type carbons tended to be deposited over the Ni/SiO 2 catalysts prepared by impregnation, while filamentous type carbons were favoured with the sol-gel prepared catalysts. The influence of catalyst promoters (Ce, Mg, Al) added to the Ni/SiO 2 catalyst prepared by the sol-gel method was found not to be significant, as the H 2 production was not increased and the tar formation was not reduced with the metaladded catalyst. The highest H 2 concentration of 57.9 vol.% and lower tar amount produced of 0.24 mg tar /g RDF ; were obtained using the 20 wt.% Ni/SiO 2 catalyst prepared by sol-gel. On the other hand a low catalytic activity for H 2 production and higher tar produced were found for the impregnated series of catalysts, which might be due to the smaller surface area, pore size and due to the formation of amorphous carbons on the catalyst surface. Alkenes and alcohol functional groups were mainly found in the analysed tar samples, with major concentrations of styrene, phenol, indene, cresols, naphthalene, fluorene, and phenanthrene.

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Section: Bet Analysis Of Fresh Catalystsmentioning

confidence: 97%

Characterization and evaluation of Ni/SiO2 catalysts for hydrogen production and tar reduction from catalytic steam pyrolysis-reforming of refuse derived fuel

Blanco

Onwudili

et al. 2013

Applied Catalysis B: Environmental

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“…One relevant parameter from the BET analysis is the total surface area as it is generally related to the accessibility of active sites, hence it is associated with the catalytic activity [37]. From the results obtained it was observed that for the BHPG catalysts, the activity towards hydrogen production followed the same order as the surface area; the highest surface area of 440 m 2 g -1 resulted in the highest hydrogen production 19 mmol H 2 g -1 RDF .…”

Section: Catalytic Activity Of the Ni/sio 2 Catalysts During Pyrolysimentioning

confidence: 97%

Influence of Ni/SiO2 catalyst preparation methods on hydrogen production from the pyrolysis/reforming of refuse derived fuel

Blanco

Williams

2014

International Journal of Hydrogen Energy

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Hydrogen production from the pyrolysis/reforming of refuse derived fuel (RDF) was investigated with a series of Ni/SiO 2 catalysts. The catalysts were prepared by homogeneous precipitation derived from a sol-gel method (HPG) and compared to Ni/SiO 2 catalysts prepared by adding a phase separation step to the HPG process (B-HPG). All the catalysts had a NiO loading of 10 wt.%, and three different calcination temperatures (500 ºC, 700 ºC and 900 ºC) were used for each method. The prepared Ni/SiO 2 catalysts were analysed to determine their surface area, and porosity characteristics; additionally scanning electron microscopy (SEM-EDX), transmission electron microscopy (TEM), infrared spectroscopy (FTIR), and X-Ray diffraction (XRD) analyses were carried out. The results showed that the catalyst prepared by HPG and calcined at 700 ºC (HPG700), presented a relatively high surface area (~347 m 2 g -1 ), large pore diameter (12.50 nm), and also resulted in the highest catalytic activity towards H 2 production, attaining ~60 vol.% hydrogen. The lowest hydrogen concentration of about 42 vol.% was obtained using the catalysts prepared by the combined HPG-phase separation method, and calcined at 900 ºC (B-HPG900). It was also observed that at calcination temperatures higher than 700 ºC the catalytic activity for hydrogen production was diminished for both preparation methods.

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“…A Varian 3380 GC with a 80-100 mesh HayeSep column and N 2 carrier gas and flame ionisation detector was used to analyse hydrocarbons (C 1 -C 4 ). to the catalytic activity of the catalyst, in which high surface area typically improves the activity of the catalyst [16,17]. Addition of the Cu, Mg and Co promoters to the Ni-Al catalyst reduced the surface area of the catalysts.…”

Section: Experimental Systemmentioning

confidence: 99%

Influence of nickel-based catalysts on syngas production from carbon dioxide reforming of waste high density polyethylene

Saad

Nahil

et al. 2015

Fuel Processing Technology

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Abstract:Syngas production (H 2 and CO) from carbon dioxide reforming of high density polyethylene (HDPE) over Ni-Al catalyst was evaluated in a two-stage fixed bed reactor. Syngas production was favoured by CO 2 addition, with the highest production of 138.81 mmol syngas g -1 HDPE , which was about six times higher than non-catalytic, non-CO 2 addition. The catalytic performances of nickel-based catalysts with different promoter metals (Cu, Mg and Co) in the CO 2 reforming of HDPE were also studied. It was found that Ni-Co-Al had an excellent anti-coking performance, with no detectable formation of coke on the catalyst surface. Moreover, the syngas production was significantly improved by the addition of Co compared to the Cu and Mg metal promoters. The CO 2 conversion for Ni-Co-Al catalyst was also the highest at 57.62 %.Further investigation of the effect of Co concentration on CO 2 reforming of HDPE showed that the higher Co content, the higher syngas production and CO 2 conversion.

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Preparation of nickel-mesoporous materials and their application to the hydrodechlorination of chlorinated organic compounds

Cited by 12 publications

References 87 publications

Characterization and evaluation of Ni/SiO2 catalysts for hydrogen production and tar reduction from catalytic steam pyrolysis-reforming of refuse derived fuel

Characterization and evaluation of Ni/SiO2 catalysts for hydrogen production and tar reduction from catalytic steam pyrolysis-reforming of refuse derived fuel

Influence of Ni/SiO2 catalyst preparation methods on hydrogen production from the pyrolysis/reforming of refuse derived fuel

Influence of nickel-based catalysts on syngas production from carbon dioxide reforming of waste high density polyethylene

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