Uncoupling the size and support effects of Ni catalysts for dry reforming of methane

Han, Joung Woo; Park, Jun Seong; Choi, Min Suk; Lee, Hyunjoo

doi:10.1016/j.apcatb.2016.10.069

Cited by 278 publications

(120 citation statements)

References 45 publications

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“…This highlighted the importance of developing highly dispersed small Ni nanoparticles (<5 nm) which possessing high resistance of carbon formation. This is in line with numerous experimental results previously performed by many researchers, indicating that the carbon formation on Ni surface during DRM reaction can be minimized by reducing the size of Ni particles [37,38,63,64].…”

Section: Enhancement Of Dispersion and Thermal Stability Of Ni Nanopasupporting

confidence: 79%

“…Many scientific results pointed that the size of Ni nanoparticles need to be below at least 8 nm to exhibit high resistance towards carbon formation [37,38,63,64]. However, those small Ni nanoparticles are prone to forming larger particles by the aggregation at high temperature (>700 • C).…”

Section: Enhancement Of Dispersion and Thermal Stability Of Ni Nanopamentioning

confidence: 99%

“…The formation of bimetallic states with noble-metals and other transition metal has been extensively studied [18][19][20]25], and it has also been demonstrated that catalytic performances of Ni catalysts are strongly related to the basicity of metal-oxide supports [26][27][28][29][30][31][32][33][34]. In addition, many scientific results indicate that coke formation on Ni catalysts is less favored when their size are in a nano meter scale [35][36][37][38]. Very recently, many efforts have been made towards the fabrication of small Ni nano particles with high thermal stability, which can retain their initial high reactivity and coke-resistance during long-term operation of DRM reaction.…”

Section: Introductionmentioning

confidence: 99%

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Recent Scientific Progress on Developing Supported Ni Catalysts for Dry (CO2) Reforming of Methane

Seo

2018

Catalysts

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Two major green house gases (CO 2 and CH 4 ) can be converted into useful synthetic gas (H 2 and CO) during dry reforming of methane (DRM) reaction, and a lot of scientific efforts has been made to develop efficient catalysts for dry reforming of methane (DRM). Noble metal-based catalysts can effectively assist DRM reaction, however they are not economically viable. Alternatively, non-noble based catalysts have been studied so far, and supported Ni catalysts have been considered as a promising candidate for DRM catalyst. Main drawback of Ni catalysts is its catalytic instability under operating conditions of DRM (>700 • C). Recently, it has been demonstrated that the appropriate choice of metal-oxide supports can address this issue since the chemical and physical of metal-oxide supports can prevent coke formation and stabilize the small Ni nanoparticles under harsh conditions of DRM operation. This mini-review covers the recent scientific findings on the development of supported Ni catalysts for DRM reaction, including the synthetic methods of supported Ni nanoparticles with high sintering resistance.

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Section: Enhancement Of Dispersion and Thermal Stability Of Ni Nanopasupporting

confidence: 79%

Section: Enhancement Of Dispersion and Thermal Stability Of Ni Nanopamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recent Scientific Progress on Developing Supported Ni Catalysts for Dry (CO2) Reforming of Methane

Seo

2018

Catalysts

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“…As is widely accepted in the literature, smaller-sized nickel metal precursors can help provide higher catalytic activity and stability and suppress carbon deposition (Usman et al, 2015;Bawadi et al, 2017). As an example, Han et al (2017) evaluated the dependence of the CH 4 or CO 2 turnover frequency on the Ni size and showed that Ni nano-particles of 2.6 nm had 4.1 times higher methane turnover frequency in comparison to Ni nano-particles with a size of 17.3 nm. The decrease in turnover frequency was reduced as the size of the Ni nano-particles increased.…”

Section: Catalytic Performancementioning

confidence: 99%

“…In this respect, nickel based catalysts attract particular attention as they are known to exhibit excellent catalytic performance; the drawback is that they suffer from the aforementioned problems Charisiou et al, 2016b;Elsayed et al, 2017). In theory, coke deposition can be avoided by: (i) altering the electronic properties of metal-support interactions, (ii) influencing the size of metallic particles and, (iii) improving the oxygen storage capacity and mobility within supporting material (Roh et al, 2006;Kumar et al, 2007;Chen et al, 2008;Goula et al, 2014;Yentekakis et al, 2015Yentekakis et al, , 2016Han et al, 2017). Thus, the attempts that have been undertaken to improve the stability of DRM nickel catalysts have focused on the use of different oxides as supports (e.g., Al 2 O 3 , SiO 2 , La 2 O 3 , CeO 2 , ZrO 2 ) (Pompeo et al, 2007;Bereketidou and Goula, 2012;Li et al, 2016) or the use of a variety of dopants that include transition metals (e.g., Fe, Co, Sn) (Ay and Uner, 2015;Theofanidis et al, 2015;Zhao et al, 2016), noble metals (e.g., Ag, Pt, Pd, Ir) Yentekakis et al, 2015;Yu et al, 2015), lanthanide metals (e.g., La, Ce, Pr) (Goula et al, 2016a;Vasiliades et al, 2016;Xiang et al, 2016) and alkaline earth metals (e.g., Sr, Ca, Ba) (Bellido et al, 2009;Sutthiumporn and Kawi, 2011).…”

Section: Introductionmentioning

confidence: 99%

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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The effects of stoichiometry on the properties of exsolved Ni‐Fe alloy nanoparticles for dry methane reforming

et al. 2020

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The dry reforming of methane has received notable attention as a chemical process to convert natural gas into value-added chemicals and fuels. Ni-based exsolution catalysts using perovskite oxides supports have been used for their attractive sinterresistance and coke-resistance properties. The perovskite oxide in itself has unique defect chemistry that can be used to manipulate and control the properties of the catalyst nanoparticles exsolved on the surface, therefore influencing both the nanoparticle and support characteristics. In this study, the La:Fe ratio of Ni-doped LaFeO 3 was used to manipulate and control the properties of exsolved Ni-Fe alloy nanoparticles. The Ni-Fe nanoparticles consisted of different sizes ranging from 10 to 380 nm. Temperature programmed surface reaction studies along with materials characterization with SEM, STEM-HAADF, XRD, and BET showed that the Ni-Fe nanoparticles from different solid precursors have the same active sites for methane activation but differ in performance and stability because of size effects, metalsupport strength, composition and support basicity. A mechanism is proposed to decipher the merits of the Ni-Fe nanoparticles with the best activity, selectivity, and stability in this study.

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Uncoupling the size and support effects of Ni catalysts for dry reforming of methane

Cited by 278 publications

References 45 publications

Recent Scientific Progress on Developing Supported Ni Catalysts for Dry (CO2) Reforming of Methane

Recent Scientific Progress on Developing Supported Ni Catalysts for Dry (CO2) Reforming of Methane

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

The effects of stoichiometry on the properties of exsolved Ni‐Fe alloy nanoparticles for dry methane reforming

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