Effect of calcination temperature on stability and activity of Ni/MgAl2O4 catalyst for steam reforming of methane at high pressure condition

Katheria, Sanjay; Gupta, Abhishek; Deo, Goutam; Kunzru, Deepak

doi:10.1016/j.ijhydene.2016.05.109

Cited by 77 publications

(30 citation statements)

References 35 publications

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“…Similarly, other researchers have reported the improved characteristics of catalysts prepared via sol-gel route, for instance Bej et al [72] have varied the catalyst calcination temperature and Ni loading to optimize the NiO crystallite size on a Ni/SiO 2 catalyst prepared using sol-gel method. Low calcination temperatures (i.e., 400 • C) was found to produce small Ni particle size recording a CH 4 conversion of about 96% at 700 • C and H 2 O/CH 4 ratio of 3.5 stable up to 3 h, confirming previous findings [74]. However, it is worthy to mention that an optimization of the calcination temperature is always required, due to their impact on the metal particle size and catalyst surface area, and consequently the catalytic performance.…”

Section: Steam Reforming Of Methane (Srm)supporting

confidence: 88%

Recent Advances in Supported Metal Catalysts for Syngas Production from Methane

2018

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Abstract:Over the past few years, great attention is paid to syngas production processes from different resources especially from abundant sources, such as methane. This review of the literature is intended for syngas production from methane through the dry reforming (DRM) and the steam reforming of methane (SRM). The catalyst development for DRM and SRM represents the key factor to realize a commercial application through the utilization of more efficient catalytic systems. Due to the enormous amount of published literature in this field, the current work is mainly dedicated to the most recent achievements in the metal-oxide catalyst development for DRM and SRM in the past five years. Ni-based supported catalysts are considered the most widely used catalysts for DRM and SRM, which are commercially available; hence, this review has focused on the recent advancements achieved in Ni catalysts with special focus on the various attempts to address the catalyst deactivation challenge in both DRM and SRM applications. Furthermore, other catalytic systems, including Co-based catalysts, noble metals (Pt, Rh, Ru, and Ir), and bimetallic systems have been included in this literature review to understand the observed improvements in the catalytic activities and coke suppression property of these catalysts.

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Section: Steam Reforming Of Methane (Srm)supporting

confidence: 88%

Recent Advances in Supported Metal Catalysts for Syngas Production from Methane

2018

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“…From these results, it is seen that an increase of the calcination temperature not only enhanced the NiO interaction with MgAl 2 O 4 but also increased the content of NiAl 2 O 4 formation in the catalyst, as shown in the TPR profile. Katheria et al . discussed the mechanism of the diffusion and dispersion of nickel oxide on the surface and bulk of a catalyst support with the calcination temperature.…”

Section: Resultsmentioning

confidence: 99%

Biogas Reforming for Hydrogen Production: A New Path to High‐Performance Nickel Catalysts Supported on Magnesium Aluminate Spinel

et al. 2016

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Highly dispersed Ni nanoparticles supported on high‐surface‐area mesoporous nanocrystalline MgAl2O4 powder was generated by a facile and simple propylene oxide assisted gelation agent route. The mesoporous spinel materials exhibited enhanced catalytic performance for hydrogen production in biogas dry reforming. The obtained spinel catalysts with different Ni loadings after calcination at 700 °C possessed high BET surface areas (236–224 m2 g−1). A narrow pore size distribution in the mesopore range was observed in the samples, and all the samples except 2.5 wt % Ni showed a mesoporous–macroporous structure. The 5 wt % Ni/MgAl2O4 sample showed the highest activity for the biogas dry reforming reaction because of the high dispersion of Ni on the mesoporous surface of the spinel support. X‐ray photoelectron spectroscopy revealed that the catalysts with a low Ni loading undergo the exchange of Mg2+ by Ni2+, whereas catalysts with a higher Ni loading undergo the substitution of Al3+ by Ni3+. Thus, appropriate partial Ni substitution in the MgAl2O4 support may play a role in the elevated catalytic performance.

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“…Two wide and asymmetric reduction domains are observed for Ni/LaAl catalyst: the reduction to Ni 0 of surface NiO with low interaction with the support takes place in the 250-370 °C range, whereas the band between 370-700 °C corresponds to the reduction to Ni 0 of well dispersed NiOx species, probably of an amorphous nature and with high interaction with the support [25]. A reduction peak of low intensity is also observed above 700 °C for the Ni/LaAl catalyst that corresponds to the reduction to Ni 0 of the Ni 2+ in the spinel phase (NiAl2O4), whose low intensity is explained by its low calcination temperature (550 °C) because the formation of the spinel requires higher temperatures [25,36]. The commercial catalyst G90 has the main reduction peak with a maximum near 420 °C, attributed to the reduction of NiO with a slight interaction with the αAl2O3 Two wide and asymmetric reduction domains are observed for Ni/LaAl catalyst: the reduction to Ni 0 of surface NiO with low interaction with the support takes place in the 250-370 • C range, whereas the band between 370-700 • C corresponds to the reduction to Ni 0 of well dispersed NiO x species, probably of an amorphous nature and with high interaction with the support [25].…”

Section: Physical Properties (N 2 Adsorption-desorption)mentioning

confidence: 92%

“…The commercial catalyst G90 has the main reduction peak with a maximum near 420 °C, attributed to the reduction of NiO with a slight interaction with the αAl2O3 Two wide and asymmetric reduction domains are observed for Ni/LaAl catalyst: the reduction to Ni 0 of surface NiO with low interaction with the support takes place in the 250-370 • C range, whereas the band between 370-700 • C corresponds to the reduction to Ni 0 of well dispersed NiO x species, probably of an amorphous nature and with high interaction with the support [25]. A reduction peak of low intensity is also observed above 700 • C for the Ni/LaAl catalyst that corresponds to the reduction to Ni 0 of the Ni 2+ in the spinel phase (NiAl 2 O 4 ), whose low intensity is explained by its low calcination temperature (550 • C) because the formation of the spinel requires higher temperatures [25,36]. The commercial catalyst G90 has the main reduction peak with a maximum near 420 • C, attributed to the reduction of NiO with a slight interaction with the αAl 2 O 3 support, and a peak near 680 • C probably related to the reduction of Ni 2+ in the NiAl 2 O 4 phase, according to the composition given by the provider (Sud-Chemie).…”

Section: Physical Properties (N 2 Adsorption-desorption)mentioning

confidence: 92%

Oxidative Steam Reforming of Raw Bio-Oil over Supported and Bulk Ni Catalysts for Hydrogen Production

et al. 2018

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Several Ni catalysts of supported (on La 2 O 3 -αAl 2 O 3 , CeO 2 , and CeO 2 -ZrO 2 ) or bulk types (Ni-La perovskites and NiAl 2 O 4 spinel) have been tested in the oxidative steam reforming (OSR) of raw bio-oil, and special attention has been paid to the catalysts' regenerability by means of studies on reaction-regeneration cycles. The experimental set-up consists of two units in series, for the separation of pyrolytic lignin in the first step (at 500 • C) and the on line OSR of the remaining oxygenates in a fluidized bed reactor at 700 • C. The spent catalysts have been characterized by N 2 adsorption-desorption, X-ray diffraction and temperature programmed reduction, and temperature programmed oxidation (TPO). The results reveal that among the supported catalysts, the best balance between activity-H 2 selectivity-stability corresponds to Ni/La 2 O 3 -αAl 2 O 3 , due to its smaller Ni 0 particle size. Additionally, it is more selective to H 2 than perovskite catalysts and more stable than both perovskites and the spinel catalyst. However, the activity of the bulk NiAl 2 O 4 spinel catalyst can be completely recovered after regeneration by coke combustion at 850 • C because the spinel structure is completely recovered, which facilitates the dispersion of Ni in the reduction step prior to reaction. Consequently, this catalyst is suitable for the OSR at a higher scale in reaction-regeneration cycles.

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Effect of calcination temperature on stability and activity of Ni/MgAl2O4 catalyst for steam reforming of methane at high pressure condition

Cited by 77 publications

References 35 publications

Recent Advances in Supported Metal Catalysts for Syngas Production from Methane

Recent Advances in Supported Metal Catalysts for Syngas Production from Methane

Biogas Reforming for Hydrogen Production: A New Path to High‐Performance Nickel Catalysts Supported on Magnesium Aluminate Spinel

Oxidative Steam Reforming of Raw Bio-Oil over Supported and Bulk Ni Catalysts for Hydrogen Production

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