Influences of Various Supports, γ-Al2O3, CeO2, and SBA-15 on HDO Performance of NiMo Catalyst

Phan, Binh Minh Quoc; Ha, Quan Luu Manh; Le, Nguyen Phuc; Ngo, Phuong Thuy; Nguyen, Tien V.; Dang, Tung T.; Nguyen, Luong Huu; Nguyen, Duc Anh; Luu, Loc Cam

doi:10.1007/s10562-014-1412-4

Cited by 21 publications

(7 citation statements)

References 32 publications

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“…Moreover, the small inclination of hysteresis indicated that the obtained pores were uniform. This result was further confirmed by the TEM image of synthesized SBA-15 reported in our previous paper [26]. The diameter of the channels of SBA-15, determined from the N 2 adsorption isotherms (Figure 1(d)) and TEM analysis [26], was approximately 6.08 nm.…”

Section: Resultssupporting

confidence: 83%

“…This result was further confirmed by the TEM image of synthesized SBA-15 reported in our previous paper [26]. The diameter of the channels of SBA-15, determined from the N 2 adsorption isotherms (Figure 1(d)) and TEM analysis [26], was approximately 6.08 nm. The specific surface area and pore volume of the synthesized SBA-15, determined from the N 2 adsorption isotherm, were 639.1 m 2 •g -1 and 0.65 cm 3 •g -1 , respectively.…”

Section: Resultssupporting

confidence: 83%

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Effect of NH3 Alkalization and MgO Promotion on the Performance of Ni/SBA-15 Catalyst in Combined Steam and Carbon Dioxide Reforming of Methane

Phuong

Lộc

Tri

et al. 2021

Journal of Nanomaterials

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In this work, 31.4 wt.% Ni/SBA-15 (Ni/SBA-15) nonpromoted and alkalized with ammonia solution and by MgO promoter catalysts were prepared and used for combined steam and CO2 reforming of CH4 (bireforming). Effect of concentration of ammonia solution (NH3(aq)) (10–25 vol.%) and Mg content (3–12 wt.%) on the properties of the Ni/SBA-15 catalysts was investigated by low-angle and powder X-ray diffraction (XRD), N2-BET isothermal adsorption, SEM, TEM, EDS mapping, H2-TPR, and CO2-TPD methods. The performance of the catalysts in bireforming was assessed in the temperature range of 550–800°C. The enhancement of dispersion of NiO particles, reducibility, and basicity of alkalized Ni/SBA-15 catalysts were responsible for improving the catalytic performance of this catalyst. The results revealed that the Ni/SBA-15 treated with 15-25% NH3(aq) solution and promoted with 3-9% Mg exhibited high activity for CH4 conversion. Meanwhile, Ni6Mg/SBA-15 showed the highest CO2 conversion. Among tested catalysts, Ni/SBA-15-20NH3 and Ni9Mg/SBA-15 samples had an almost equal activity with a CH4 conversion of nearly 97% and a CO2 conversion of about 84% at 700°C thanks to its moderate affinity with both CO2 and CH4. However, the H2/CO ratio of the product mixture remained at 2.02 on the Ni/SBA-15-20NH3 catalyst and almost 1 on the Ni9Mg/SBA-15 sample. These results might be related to the fact that the alkalization of the Ni/SBA-15 catalyst by NH3(aq) solution had an advantage over using MgO because side reactions were unlikely to occur.

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Section: Resultssupporting

confidence: 83%

Section: Resultssupporting

confidence: 83%

Effect of NH3 Alkalization and MgO Promotion on the Performance of Ni/SBA-15 Catalyst in Combined Steam and Carbon Dioxide Reforming of Methane

Phuong

Lộc

Tri

et al. 2021

Journal of Nanomaterials

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“…It is reported that the typical reduction step of molybdenum trioxide (Mo 6+ → Mo 4+ ) in amorphous, multilayered Mo oxides or octahedral Mo species should be presented at temperatures around 544 °C. 30 However, no apparent reduction zone can be observed around 544 °C in the TPR profile of NiMo/CeO 2 . Perhaps the lack of Mo reduction peaks is due to the low Mo loading (2 wt %) in the NiMo/CeO 2 catalysts and/or the observed shift of the reduction zones accounts for interaction among Mo−Ni− Ce particles.…”

Section: ■ Results and Discussionmentioning

confidence: 96%

“…As for the bimetallic Ni–Mo/CeO 2 catalysts, the TPR profile is in general terms very similar to that of the Ni/CeO 2 but with a shift of the medium-temperature reduction processes toward higher temperatures. It is reported that the typical reduction step of molybdenum trioxide (Mo 6+ → Mo 4+ ) in amorphous, multilayered Mo oxides or octahedral Mo species should be presented at temperatures around 544 °C . However, no apparent reduction zone can be observed around 544 °C in the TPR profile of NiMo/CeO 2 .…”

Section: Resultsmentioning

confidence: 99%

Investigating New Routes for Biomass Upgrading: “H₂-Free” Hydrodeoxygenation Using Ni-Based Catalysts

Jin

Pastor‐Pérez

Villora-Picó

et al. 2019

ACS Sustainable Chem. Eng.

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This work showcases an innovative route for biocompound upgrading via hydrodeoxygenation (HDO) reactions, eliminating the need for external high-pressure hydrogen supply. We propose the use of water as reaction media and the utilization of multifunctional catalysts that are able to conduct multiple steps such as water activation and HDO. In this study, we validate our hypothesis in a high-pressure batch reactor process using guaiacol as a model compound and multicomponent Ni-based catalysts. In particular, a comparison between ceria-supported and carbon/ceria-supported samples is established, the carbon-based materials being the suitable choice for this reaction. The physicochemical study by X-ray photoelectron spectroscopy, transmission electron microscopy, X-ray diffraction, and temperature-programmed reduction reveals the greater dispersion of Ni clusters and the strong metal-support interaction in the carbon/ceria-based samples accounting for the enhanced performance. In addition, the characterization of the spent samples points out the resistance of our catalysts toward sintering and coking. Overall, the novel catalytic approach proposed in this paper opens new research possibilities to achieve low-cost bio-oil upgrading processes.

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“…ZrO2, CeO2, and ZrO2-CeO2 mixtures have received attention as promising support materials [185,218,265,274,277,281,290,300,[324][325][326][327]. These oxophilic carriers can potentially activate molecules for HDO on the catalyst surface [185,290,327].…”

Section: Role Of Supportmentioning

confidence: 99%

Transportation fuels from biomass fast pyrolysis, catalytic hydrodeoxygenation, and catalytic fast hydropyrolysis

Dabros¹,

Stummann²,

Høj³

et al. 2018

Progress in Energy and Combustion Science

228

147

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Influences of Various Supports, γ-Al2O3, CeO2, and SBA-15 on HDO Performance of NiMo Catalyst

Cited by 21 publications

References 32 publications

Effect of NH3 Alkalization and MgO Promotion on the Performance of Ni/SBA-15 Catalyst in Combined Steam and Carbon Dioxide Reforming of Methane

Effect of NH3 Alkalization and MgO Promotion on the Performance of Ni/SBA-15 Catalyst in Combined Steam and Carbon Dioxide Reforming of Methane

Investigating New Routes for Biomass Upgrading: “H₂-Free” Hydrodeoxygenation Using Ni-Based Catalysts

Transportation fuels from biomass fast pyrolysis, catalytic hydrodeoxygenation, and catalytic fast hydropyrolysis

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Influences of Various Supports, γ-Al2O3, CeO2, and SBA-15 on HDO Performance of NiMo Catalyst

Cited by 21 publications

References 32 publications

Effect of NH3 Alkalization and MgO Promotion on the Performance of Ni/SBA-15 Catalyst in Combined Steam and Carbon Dioxide Reforming of Methane

Effect of NH3 Alkalization and MgO Promotion on the Performance of Ni/SBA-15 Catalyst in Combined Steam and Carbon Dioxide Reforming of Methane

Investigating New Routes for Biomass Upgrading: “H2-Free” Hydrodeoxygenation Using Ni-Based Catalysts

Transportation fuels from biomass fast pyrolysis, catalytic hydrodeoxygenation, and catalytic fast hydropyrolysis

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Product

Resources

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Investigating New Routes for Biomass Upgrading: “H₂-Free” Hydrodeoxygenation Using Ni-Based Catalysts