Sol–gel synthesis of Ni–Co/Al2O3–MgO–ZrO2 nanocatalyst used in hydrogen production via reforming of CH4/CO2 greenhouse gases

Sajjadi, Seyed Mehdi; Haghighi, Mohammad; Rahmani, Farhad

doi:10.1016/j.jngse.2014.11.014

Cited by 48 publications

(14 citation statements)

References 68 publications

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“…The drawback of methane-reforming processes is mainly the severe tendency to carbon formation that deactivates the catalysts [23][24][25]. Noble metal-based catalysts (Rh, Ru, Pt, Pd and Ir) presented a high activity and stability against coke formation [26,27].…”

Section: Catalysts For Methane-reforming Reactionsmentioning

confidence: 99%

Syngas Production Using Natural Gas from the Environmental Point of View

Roseno¹,

Alves²,

Giudici³

et al. 2018

Biofuels - State of Development

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The search for clean and low-cost fuels as alternative for petroleum is a popular research focus in the energy field. The demand of natural gas as an energy source has increased steadily. The high H:C ratio and the absence of heteroatoms make natural gas an attractive feedstock for synthetic fuels and chemicals that can replace those that are typically petroleum-derived. The search for efficient routes to convert methane to other higher added-value products is a challenge for the scientific community. In addition, new fields of oil and gas contain associated CO 2 (8-18%), and, in some specific fields, the associated gas encloses a higher CO 2 content (79%). In this context, the tri-reforming process combines two of the most problematic greenhouse gases (CH 4 and CO 2 ) to generate syngas for the synthesis of clean liquid fuels and valuable chemicals. Developments in tri-reforming processes, which include the new catalysts, are presented in this chapter.

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Section: Catalysts For Methane-reforming Reactionsmentioning

confidence: 99%

Syngas Production Using Natural Gas from the Environmental Point of View

Roseno¹,

Alves²,

Giudici³

et al. 2018

Biofuels - State of Development

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“…[16][17][18][19] Catalysts used for DRM can be divided into two groups: earth-abundant transition metals and noble metals. 20 The majority of catalysts are based on Ni due to its high activity and low cost, 21 whereas these catalysts usually undergo deactivation processes mainly due to carbon deposition 22 ; Noble metals [23][24][25][26] have demonstrated much more resistance to carbon deposition than Ni catalysts, but are generally uneconomical. Furthermore, those catalysts could also be exploited to convert raw biogas (which mainly contains CH 4 and CO 2 ) into syngas.…”

Section: Introductionmentioning

confidence: 99%

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

Cai

2019

Energy Science & Engineering

124

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Two typical processes have been developed for the conversion of methane and carbon dioxide to higher valuable products: dry reforming of methane (DRM) and CO2‐oxidative coupling of methane (CO2‐OCM). Numerous articles reviewed progresses in either DRM or CO2‐OCM, but no one covers both processes. In this review article, we systematically evaluated progresses in both DRM and CO2‐OCM processes for conversion of methane and CO2 to highly valuable products. Critical issues, which are carbon deposition and high energy cost for DRM and the contradiction between large activity and high selectivity for CO2‐OCM, were emphasized. Strategies to develop effective catalysts were evaluated, including the enhancement of metal‐support interactions, the introduction of promotors, the formation of solid solutions, and the construction of core‐shell structures. Plasma and photocatalysis were discussed as new promising technologies for DRM and CO2‐OCM.

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“…Among the noted techniques, sol‐gel is a widely used process due to its ability in fabrication of homogeneous materials . This technique will possibly lead to synthesis of nanocatalysts with excellent characterizations such as uniform particle size scattering and high surface area . Ni/Al 2 O 3 and Co/Al 2 O 3 were prepared via various methods including impregnation, sol‐gel, and their combination.…”

Section: Introductionmentioning

confidence: 99%

“…20,21 This technique will possibly lead to synthesis of nanocatalysts with excellent characterizations such as uniform particle size scattering and high surface area. 22,23 Ni/Al 2 O 3 and Co/Al 2 O 3 were prepared via various methods including impregnation, sol-gel, and their combination. Their performances were compared with each other.…”

Section: Introductionmentioning

confidence: 99%

Influence of tungsten loading on CO₂ /O₂ reforming of methane over Co-W-promoted NiO-Al₂ O₃ nanocatalyst designed by sol-gel-plasma

Sajjadi

Haghighi

2018

Int J Energy Res

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Summary Co‐W–promoted NiAl2O4 nanocatalyst with various amount of tungsten (0, 1, 3, and 7 wt.%) was fabricated via hybrid sol‐gel‐plasma method. The nanocatalysts were evaluated by XRD, FESEM, EDX, BET, and FTIR analyses. The samples were utilized in CO2/O2 reforming of methane to syngas. EDX results proved the existence of all the applied elements in synthesis. FESEM and BET results illustrated that tungsten addition led to lower surface area, larger particle size, and roughly worse particles scattering. Therefore, Co‐NiAl2O4 (NCW0A) presented higher yield; however, yields were reduced for the other samples due to the covering impact of tungsten. As a result of time on streams performance (2880 minutes and at 750°C), the 7 wt.% tungsten promoted sample exhibited stable but lower yield (YH2 = 64%). Moreover, NCW1A exhibited more stable and higher yield than NCW0A. Optimum operating parameters were obtained as GHSV = 24 l/gcat.h, CH4/CO2 = 1, and CH4/CO2/O2 = 1/1/0.08. TG‐DTG, EDX, and FESEM analyses were applied for the used samples. TG‐DTG graphs demonstrated that by rising of tungsten loading, lighter and lower amount of coke was formed. Some agglomerations were observed in the EDX images of NCW0A and NCW1A while lower agglomeration was found for the tungsten‐rich sample. Carbon fiber formation was detected in the FESEM images of the used NCW0A while for the others, amount of the deposited coke and carbon fibers decreased.

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Sol–gel synthesis of Ni–Co/Al2O3–MgO–ZrO2 nanocatalyst used in hydrogen production via reforming of CH4/CO2 greenhouse gases

Cited by 48 publications

References 68 publications

Syngas Production Using Natural Gas from the Environmental Point of View

Syngas Production Using Natural Gas from the Environmental Point of View

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

Influence of tungsten loading on CO₂ /O₂ reforming of methane over Co-W-promoted NiO-Al₂ O₃ nanocatalyst designed by sol-gel-plasma

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Sol–gel synthesis of Ni–Co/Al2O3–MgO–ZrO2 nanocatalyst used in hydrogen production via reforming of CH4/CO2 greenhouse gases

Cited by 48 publications

References 68 publications

Syngas Production Using Natural Gas from the Environmental Point of View

Syngas Production Using Natural Gas from the Environmental Point of View

Advances in catalytic conversion of methane and carbon dioxide to highly valuable products

Influence of tungsten loading on CO2 /O2 reforming of methane over Co-W-promoted NiO-Al2 O3 nanocatalyst designed by sol-gel-plasma

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Product

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Influence of tungsten loading on CO₂ /O₂ reforming of methane over Co-W-promoted NiO-Al₂ O₃ nanocatalyst designed by sol-gel-plasma