Mo promoting Ni-based catalysts confined by halloysite nanotubes for dry reforming of methane: Insight of coking and H2S poisoning resistance

Zheng, Jiajia; Impeng, Sarawoot; Liu, Jun; Deng, Jiang; Zhang, Dengsong

doi:10.1016/j.apcatb.2023.123369

Cited by 16 publications

(6 citation statements)

References 62 publications

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“…Interestingly, after acid treatment, a broad peak around 3440 cm –1 corresponding to SiO–H vibrations appears, suggesting the formation of SiO 2 nanoparticles. In addition, the peak intensity of in-plane Si–O deformations at 1090 cm –1 increases after partial dissolution of the alumina …”

Section: Resultsmentioning

confidence: 99%

“…In addition, the peak intensity of in-plane Si−O deformations at 1090 cm −1 increases after partial dissolution of the alumina. 40 The effect of acid treatment on the HNT morphology was investigated by TEM characterization. It can be seen from Figure 1b that natural HNTs have a distinct hollow tubular structure with smooth tube walls.…”

Section: Influence Of Nitric Acidmentioning

confidence: 99%

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Nitric Acid-Pretreated Natural Halloysite Nanotubes as Ni Nanoparticle Catalyst Supports for CO₂ Methanation

Yang,

Meng,

et al. 2024

ACS Appl. Nano Mater.

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The CO2 methanation reaction has attracted more and more attention, which can achieve a carbon cycle and high-valued chemicals, but the development of efficient catalysts remains a big challenge. Herein, the natural halloysite nanotubes (HNTs) pretreated with different concentrations of nitric acid solutions (4, 6, 8, and 10 mol/L) were used as supports for the first time to synthesize Ni-based CO2 methanation catalysts through the impregnation method. The results revealed that the catalysts prepared with acid-pretreatment HNTs demonstrated more excellent catalytic activity due to the improved dispersion of Ni nanoparticles and more basic sites, which efficiently adsorb and activate the reaction gases H2 and CO2. Moreover, the effects of metal loading on the catalytic performance were also studied. The optimized (Ni(30%)/HNTs-8AC) catalyst with a Ni loading of 30 wt % showed significantly superior CO2 conversion (95.8%) at 350 °C with CH4 selectivity of 100% at 15,000 mL/g/h and did not show significant deactivation during a 50 h stability test because of excellent resistance to coking and sintering. This work provides a support of natural materials for preparing a CO2 methanation catalyst.

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Section: Resultsmentioning

confidence: 99%

Section: Influence Of Nitric Acidmentioning

confidence: 99%

Nitric Acid-Pretreated Natural Halloysite Nanotubes as Ni Nanoparticle Catalyst Supports for CO₂ Methanation

Yang,

Meng,

et al. 2024

ACS Appl. Nano Mater.

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“…Zhang et al [119] reported an interface-confined NiMgAlO x /BN catalyst, showing an enhanced gas activation and inhibition of the deep cracking of CH 4 at the triple interface of Ni, BN, and MgAlO x , resulting in an excellent resistance to coking. Zheng et al [120] demonstrated that Mo doping could restrict the formation of filamentous carbon on Nihalloysite nanotubes through steric hindrance effects and reduce the crystallinity of carbon deposition. The high melting point of Mo decelerates the sintering of the catalyst.…”

Section: Other Supported Catalystsmentioning

confidence: 99%

Recent Advances in Coke Management for Dry Reforming of Methane over Ni-Based Catalysts

Xu,

Park

2024

Catalysts

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The dry reforming of methane (DRM) is a promising method for controlling greenhouse gas emissions by converting CO2 and CH4 into syngas, a mixture of CO and H2. Ni-based catalysts have been intensively investigated for their use in the DRM. However, they are limited by the formation of carbonaceous materials on their surfaces. In this review, we explore carbon-induced catalyst deactivation mechanisms and summarize the recent research progress in controlling and mitigating carbon deposition by developing coke-resistant Ni-based catalysts. This review emphasizes the significance of support, alloy, and catalyst structural strategies, and the importance of comprehending the interactions between catalyst components to achieve improved catalytic performance and stability.

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“…Mo-based catalysts are among of the most active for hydrodesulfurization in sulfurcontaining reaction systems, due to their excellent absorption and resistance to sulfur components [38]. Also, the high melting point of Mo-based species have been shown to be effective in eliminating carbon deposition in dry reforming of methane [39].…”

Section: Catalyst and Kinetic Modellingmentioning

confidence: 99%

Waste to H2 Sustainable Processes: A Review on H2S Valorization Technologies

Spatolisano,

Restelli,

Pellegrini

et al. 2024

Energies

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In the energy transition from fossil fuels to renewables, the tendency is to benefit from ultra-sour natural gas reserves, whose monetization was previously considered unviable. The increasing H2S content together with the growing concern about emissions that are harmful to the environment, make necessary the development of efficient strategies for pollutants management. Although large-scale H2S conversion is well-established through the Claus process, novel technologies for H2S valorization could be a reliable alternative for waste-to-valuable chemicals, following the circular economy. In this perspective, technologies such as Hydrogen Sulfide Methane Reformation (H2SMR), non-thermal plasma, photocatalytic decomposition, decomposition through cycles and electrolysis are analyzed for the H2 production from H2S. They represent promising alternatives for the simultaneous H2S valorization and H2 production, without direct CO2 emissions, as opposite to the traditional methane steam reforming. The various H2S conversion routes to H2 are examined, highlighting the advantages and disadvantages of each of them. This review focuses in particular on the most promising technologies, the H2SMR and the non-thermal plasma, for which preliminary process scheme and techno-economic analysis are also reported. Finally, the major research gaps and future developments necessary to unlock the full potential of hydrogen sulfide valorization as a sustainable pathway for hydrogen production are discussed.

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Mo promoting Ni-based catalysts confined by halloysite nanotubes for dry reforming of methane: Insight of coking and H2S poisoning resistance

Cited by 16 publications

References 62 publications

Nitric Acid-Pretreated Natural Halloysite Nanotubes as Ni Nanoparticle Catalyst Supports for CO₂ Methanation

Nitric Acid-Pretreated Natural Halloysite Nanotubes as Ni Nanoparticle Catalyst Supports for CO₂ Methanation

Recent Advances in Coke Management for Dry Reforming of Methane over Ni-Based Catalysts

Waste to H2 Sustainable Processes: A Review on H2S Valorization Technologies

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Mo promoting Ni-based catalysts confined by halloysite nanotubes for dry reforming of methane: Insight of coking and H2S poisoning resistance

Cited by 16 publications

References 62 publications

Nitric Acid-Pretreated Natural Halloysite Nanotubes as Ni Nanoparticle Catalyst Supports for CO2 Methanation

Nitric Acid-Pretreated Natural Halloysite Nanotubes as Ni Nanoparticle Catalyst Supports for CO2 Methanation

Recent Advances in Coke Management for Dry Reforming of Methane over Ni-Based Catalysts

Waste to H2 Sustainable Processes: A Review on H2S Valorization Technologies

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Nitric Acid-Pretreated Natural Halloysite Nanotubes as Ni Nanoparticle Catalyst Supports for CO₂ Methanation

Nitric Acid-Pretreated Natural Halloysite Nanotubes as Ni Nanoparticle Catalyst Supports for CO₂ Methanation