Effect of Cobalt Precursors on Properties of Co/CoAl2O4 Catalysts Synthesized by Solvothermal Method

Rojanapipatkul, Sirirat; Goodwin, James G.; Praserthdam, Piyasan; Jongsomjit, Bunjerd

doi:10.4186/ej.2012.16.4.5

Cited by 7 publications

(2 citation statements)

References 24 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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]. The TEM images of the supports are presented in Fig.…”

Section: Characteristics Of Supports and Catalystsmentioning

confidence: 90%

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Characteristics Of Supports and Catalystsmentioning

confidence: 90%

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

Self Cite

View full text Add to dashboard Cite

show abstract

“…The catalytic property of the catalysts depends upon the reaction conditions, metal dispersion, types of inorganic supports present and catalyst composition etc [23,24] . The activity of the catalyst was measured by (Nucon) gas chromatography to measure the catalyst activity and product distribution [25] .…”

Section: Introductionmentioning

confidence: 99%

Effect of nitrate metal (Ce, Cu, Mn and Co) precursors for the total oxidation of carbon monoxide

Dey¹,

Mohan²,

Dhal³

et al. 2017

REFFIT

View full text Add to dashboard Cite

The ambient temperature carbon monoxide oxidation is one of the important topics in the present sce- nario. In this paper, we prepared various types of catalysts from the precursors of cobalt nitrate, cerium nitrate, copper nitrate and manganese nitrate for the oxidation of CO. Among the prepared catalysts, the cerium nitrate precursor showed the best performance for CO oxidation at low temperature. The activity of the catalysts was measured in different calcination conditions like stagnant air, flowing air and reactive calcination (4.5% CO in air). The activity test was done in the reactor under the following reaction con- ditions: 100 mg of catalyst, 2.5% CO in the air and the reaction temperature was increased from ambient to a higher value at which complete oxidation of CO was achieved. The characterization of the catalyst was done by several techniques like XRD, FTIR, SEM-EDX, XPS and BET. The order of activity for different catalysts was as follows: Ce-Oxide > Mn-Oxide > Cu-Oxide > Co-Oxide.

show abstract

Synthesis of Co/Al2O3 Catalysts and Their Application in Heptane Steam Reforming

et al. 2017

View full text Add to dashboard Cite

Effect of Cobalt Precursors on Properties of Co/CoAl2O4 Catalysts Synthesized by Solvothermal Method

Cited by 7 publications

References 24 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

Effect of nitrate metal (Ce, Cu, Mn and Co) precursors for the total oxidation of carbon monoxide

Synthesis of Co/Al2O3 Catalysts and Their Application in Heptane Steam Reforming

Contact Info

Product

Resources

About