Ti-Si composite oxide-supported cobalt catalysts for CO2 hydrogenation

Janlamool, Jakrapan; Praserthdam, Piyasan; Jongsomjit, Bunjerd

doi:10.1016/s1003-9953(10)60213-7

Cited by 42 publications

(40 citation statements)

References 38 publications

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“…2. The diffraction peaks at 19˚, 31.3˚, 36.9˚, 44.9˚, 57˚, 59.4˚ and 65.3˚ surely indicate the Co3O4 over the supports for all impregnation methods [23]. The small peak around 38° was also appeared and can be attributed to the presence of various CoxOy species on the support [24].…”

Section: Characteristics Of Supports and Catalystsmentioning

confidence: 87%

“…The reduction is accomplished in two steps. The first reduction occurs around 220-320 C, which can be assigned to the reduction of Co3O4 to CoO, and the second step occurs around 320-500 C, which can be assigned to the reduction of CaO to Co. Cobalt silicate can be formed when the temperature is raised above 500 C depending on the support type [23]. Among the SBA-15 supported cobalt catalysts, the Co/SBA-15-N has two reduction peaks around 280-420 C and 480-520C.…”

Section: Characteristics Of Supports and Catalystsmentioning

confidence: 99%

“…6, respectively. A typical reduction of silicasupported cobalt catalyst is commonly occurred in temperature range of 200-600 C [2,23,27,28]. The reduction is accomplished in two steps.…”

Section: Characteristics Of Supports and Catalystsmentioning

confidence: 99%

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Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Kruatim¹,

Jantasee²,

Jongsomjit³

2017

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Abstract. The Co/SBA-15 and the Co/SBA-16 catalysts having 20 wt% of cobalt were prepared by the conventional impregnation method. Then, the post-impregnation treatments including vacuum and ultrasound treatments were applied. The synthesized catalysts were characterized by means of N2 physisorption, small angle X-ray diffraction (SAXRD), wide angle X-ray diffraction (XRD), scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM/EDX), transmission electron microscopy (TEM), and temperature-programmed reduction (TPR). The results show that the synthesized SBA-15 had hexagonal structure and the synthesized SBA-16 had the cubic structure. The vacuum and the ultrasound treatments after incipient wetness impregnation can apparently enhance the dispersion of cobalt on the SBA-15 catalysts due to the decrease of the metal crystallite size. However, only the vacuum treatment was suitable for the Co/SBA-16. After reduction, no cobalt-silicate compound was detected based on XRD measurement. Both postimpregnation treatments can also decrease the metal-support interaction resulting in increased activity for CO2 hydrogenation under methanation.

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Section: Characteristics Of Supports and Catalystsmentioning

confidence: 87%

Section: Characteristics Of Supports and Catalystsmentioning

confidence: 99%

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Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Kruatim¹,

Jantasee²,

Jongsomjit³

2017

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“…The highly-dispersed supported nickel has been extensively used as the catalysts in the catalytic hydrogenation of CO2to methane. The catalytic hydrogenation of carbon monoxide and carbon dioxide produces a large variety of products ranging from methane and methanol to higher molecular weight alkanes, alkenes and alcohols [7][8][9].There are two major mechanisms proposed for the methanation of CO2. First, one involves transformation of CO2 to CO prior to methanation [8].…”

Section: Introductionmentioning

confidence: 99%

“…The catalytic hydrogenation of carbon monoxide and carbon dioxide produces a large variety of products ranging from methane and methanol to higher molecular weight alkanes, alkenes and alcohols [7][8][9].There are two major mechanisms proposed for the methanation of CO2. First, one involves transformation of CO2 to CO prior to methanation [8]. The other involves pathways, in which the transformation of CO2 to CO are not required [10].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Catalytic Properties of Ni/Ti-Si Composite Oxide Catalysts via CO2 Hydrogenation

Jongsomjit¹,

Janlamool²

2017

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Abstract. In the present work, the effects of Ti addition on the characteristics and catalytic properties of the different silica-based supported nickel (Ni) catalysts were investigated. The different supports, such as the spherical silica particle (SSP), MCM41, TiSSP, and TiMCM were synthesized and used to prepare the Ni catalysts having 20 wt% of Ni loading for CO2 hydrogenation under methanation. The different supports and catalysts were characterized by means of N2 physorption, XRD, SEM/EDX, XPS, TPR, and CO chemisorption. The TiO2 was present in the anatase form after catalyst calcination. The addition of Ti can play important roles on the characteristics and catalytic properties of Ni catalysts by: (i) facilitating the reduction of Ni oxides species strongly interacted with support, (ii) preventing the formation of silicate compounds, and (iii) promoting the CO and CO2 dissociation resulting in complete inhibition of the reverse water-gas shift (RWGS) reaction, especially at high temperature. Based on CO2 hydrogenation, the NiTiMCM exhibited the highest activity and stability.

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Hydrogenation of CO₂ into Value‐added Chemicals Using Solid‐Supported Catalysts

Aktary,

Alghamdi,

Ajeebi

et al. 2024

Chemistry An Asian Journal

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Reducing CO2 emissions is an urgent global priority. In this context, several mitigation strategies, including CO2 tax and stringent legislation, have been adopted to halt the deterioration of the natural environment. Also, carbon recycling procedures undoubtedly help reduce net emissions into the atmosphere, enhancing sustainability. Utilizing Earth’s abundant CO2 for the production of high‐value chemicals and fuels opens new avenues for the chemical industry. In this context, much effort has been devoted to converting CO2 as a feedstock into various value‐added chemicals, such as CH4, lower olefins, methanol, gasoline, and long‐chain hydrocarbons, for numerous applications involving various catalytic reactions. Although several CO2‐conversion methods have been used, including electrochemical, photochemical, and biological approaches, the hydrogenation method allows the reaction to be tuned to produce the targeted compound without significantly altering infrastructure. This review discusses the numerous hydrogenation routes and their challenges, such as catalyst design, operation, and the combined art of structure–activity relationships for the various product formations.

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Ti-Si composite oxide-supported cobalt catalysts for CO2 hydrogenation

Cited by 42 publications

References 38 publications

Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Characteristics and Catalytic Properties of Ni/Ti-Si Composite Oxide Catalysts via CO2 Hydrogenation

Hydrogenation of CO₂ into Value‐added Chemicals Using Solid‐Supported Catalysts

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Ti-Si composite oxide-supported cobalt catalysts for CO2 hydrogenation

Cited by 42 publications

References 38 publications

Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Improvement of Cobalt Dispersion on Co/SBA-15 and Co/SBA-16 Catalysts by Ultrasound and Vacuum Treatments during Post-Impregnation Step

Characteristics and Catalytic Properties of Ni/Ti-Si Composite Oxide Catalysts via CO2 Hydrogenation

Hydrogenation of CO2 into Value‐added Chemicals Using Solid‐Supported Catalysts

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Product

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Hydrogenation of CO₂ into Value‐added Chemicals Using Solid‐Supported Catalysts