Carbon deposition on borated alumina supported nano-sized Ni catalysts for dry reforming of CH4

Ni, Jun; Chen, Luwei; Lin, Jianyi; Kawi, Sibudjing

doi:10.1016/j.nanoen.2012.07.011

Cited by 157 publications

(93 citation statements)

References 47 publications

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“…The enhanced acidity for all kinds of acid sites (from weak up to very strong; Figure 3A), together with the complete loss of the medium and strong basic sites, found for the Ni/WZr catalyst ( Figure 3B), are most probably the origin of this aberration. Literature data are in agreement with this view; it has been well established that enhanced bacisity of the catalysts promotes the CO 2 activation (dissociative adsorption) and thus DRM performance (Bitter et al, 1997;Rezaei et al, 2008), whilst the opposite is true on catalysts with enhanced acidity (Ni et al, 2012;Lovell et al, 2014). The slightly enhanced reducibility of the Ni/WZr catalyst in comparison to that of Ni/Zr, indicated by the H 2 -TPR experiments in Figure 4, expected to act positively on DRM performance, seems also to have a marginal effect on DRM behavior in comparison to the adverse effect of acidity.…”

Section: Catalytic Performancesupporting

confidence: 72%

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Charisiou

Siakavelas

Papageridis

et al. 2017

Front. Environ. Sci.

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The time-on-stream catalytic performance and stability of 8 wt. % Ni catalyst supported on two commercially available catalytic supports, ZrO 2 and 15 wt.% WO 3 -ZrO 2 , was investigated under the biogas dry reforming reaction for syngas production, at 750 • C and a biogas quality equal to CH 4 /CO 2 = 1.5, that represents a common concentration of real biogas. A number of analytical techniques such as N 2 adsorption/desorption (BET method), XRD, H 2 -TPR, NH 3 -and CO 2 -TPD, SEM, ICP, thermal analysis (TGA/DTG) and Raman spectroscopy were used in order to determine textural, structural and other physicochemical properties of the catalytic materials, and the type of carbon deposited on the catalytic surface of spent samples. These techniques were used in an attempt to understand better the effects of WO 3 -induced modifications on the catalyst morphology, physicochemical properties and catalytic performance. Although Ni dispersion and reducibility characteristics were found superior on the modified Ni/WZr sample than that on Ni/Zr, its dry reforming of methane (DRM) performance was inferior; a result attributed to the enhanced acidity and complete loss of the basicity recorded on this catalyst, an effect that competes and finally overshadows the benefits of the other superior properties. Raman studies revealed that the degree of graphitization decreases with the insertion of WO 3 in the crystalline structure of the ZrO 2 support, as the I D /I G peak intensity ratio is 1.03 for the Ni/Zr and 1.29 for the Ni/WZr catalyst.

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Section: Catalytic Performancesupporting

confidence: 72%

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Charisiou

Siakavelas

Papageridis

et al. 2017

Front. Environ. Sci.

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“…This participation of La 2 O 2 CO 3 species is also reflected by CO 2 conversions which have the similar tendency of CH 4 conversions [12]. Indeed, the formation of La 2 O 2 CO 3 species is detected on spent catalysts in the XRD study in the following section and the involvement of La 2 O 2 CO 3 in the DRM reaction is evidenced in the in situ DRIFTS studies shown in Section 3.3.…”

Section: Catalytic Activitymentioning

confidence: 61%

“…In our previous study by our group on DRM reaction at 700 C over Ni/ B 2 O 3 eAl 2 O 3 catalysts, the presence of strong acidic sites on the catalyst was found to favor the dissociation of adsorbed CO 2 and CH 4 , resulting in the rapid carbon accumulation and hence catalyst deactivation. In contrast the support of strong basicity can enhance the CO 2 chemisorption on Ni catalyst surface, and favor the removal of carbon deposition via gasification during the reaction [12].…”

Section: Introductionmentioning

confidence: 99%

High performance of Mg–La mixed oxides supported Ni catalysts for dry reforming of methane: The effect of crystal structure

Chen

Lin

et al. 2013

International Journal of Hydrogen Energy

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111

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“…Conversion of carbon dioxide is presently being explored as one potential alternative to its geological sequestration. Production of useful value-added products (chemicals products, fuels …) via syngas production and by dry reforming of methane ('DRM') has been investigated [109][110][111][112][113]. A major drawback of the process is formation of carbon over the catalyst surface.…”

Section: Dry Reformingmentioning

confidence: 99%

Hydrogen production from simple alkanes and oxygenated hydrocarbons over ceria–zirconia supported catalysts: Review

Nahar

Dupont

2014

Renewable and Sustainable Energy Reviews

102

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The use of ceria-zirconia based catalysts in hydrogen production from simple alkanes and oxygenated hydrocarbons for the processes of steam reforming (SR), autothermal reforming ('ATR'), catalytic partial oxidation ('CPO'), and dry reforming ('DR') are reviewed in this paper. Along with preparation methods, the effects of operating conditions like molar steam to carbon ratio, oxygen to carbon ratio, and temperature on the performance of hydrogen production from methane, acetic acid, ethanol, and glycerol were examined. SR and ATR of these feedstocks over ceria-zirconia supports have been widely investigated. In comparison the utilization of these supports in the CPO and DR processes has been investigated mainly for methane as compared to oxygenated hydrocarbons. Ce-rich supports were reported to be effective in hydrogen from SR and ATR of ethanol and glycerol and in SMR in the 'low' temperature range (500-600 °C), whereas zirconium-rich supports exhibited higher catalytic activity in the 'high' temperature range (700-800 °C). In the case of DR, Ce-rich supports were effective at high temperature. The methods of preparation of the supports/catalyst are shown to affect the surface area (catalyst/support), crystallite size of (active metal/support), reducibility and dispersion of the active metal, thus affecting performance of the catalyst.

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Carbon deposition on borated alumina supported nano-sized Ni catalysts for dry reforming of CH4

Cited by 157 publications

References 47 publications

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

High performance of Mg–La mixed oxides supported Ni catalysts for dry reforming of methane: The effect of crystal structure

Hydrogen production from simple alkanes and oxygenated hydrocarbons over ceria–zirconia supported catalysts: Review

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