Effect of calcination and reaction conditions on the catalytic performance of Co–Ni/Al2O3 catalyst for CO hydrogenation

Zare, Akbar; Zare, Ahad; Shiva, Mehdi; Mirzaei, Ali Akbar

doi:10.1016/j.jiec.2013.02.032

Cited by 18 publications

(5 citation statements)

References 23 publications

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“…The aim of this study is to examine the effects of the calcination temperature and the ratios of the components in the structure on the characteristics of the catalysts. Studies have shown that Ni-containing catalysts are generally calcined at temperatures of 500 °C and above in carbon monoxide methanation (Zare et al 2013). A heat treatment temperature of 500 °C has been studied in many studies for methanation reaction catalysts.…”

Section: Methodsmentioning

confidence: 99%

Development of NiFeSi mixed oxide catalysts for CO methanation

2021

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NiFeSi mixed oxide catalysts were prepared using the surfactant-assisted co-precipitation method to remove the CO which may be present in the fuel before entering the fuel cell, and the catalysts were calcined at two different temperatures in order to determine the effect of the calcination temperature on the characteristic properties. Catalysts were prepared in four different NiO, Fe 2 O 3 and SiO 2 weight ratios. The X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N 2 physisorption, high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM) and energy-dispersive X-ray (EDS) analysis were used to characterize the catalysts. CO methanation was done using 1% CO, 50% H 2 and the remainder He feed condition. The reaction temperature varied between the 125 °C and 375 °C. X-ray diffraction analysis showed that catalysts composed of NiO, Fe 2 O 3 and SiO 2 crystal phases. Catalysts calcined at 500 °C gave highest surface areas and their structures are composed of spherical particles on the surface. Low surface areas were obtained in catalysts calcined at 700 °C due to structural deterioration, such as small pores breaking down and combining to form large pores. Due to the increase in calcination temperature from 500 °C to 700 °C, the rod-like particles were formed from spherical particles. Activity studies were done over the catalysts calcined at 500 °C since they have highest surface area values. Between the catalysts, 0.8/0.2/1 NiFeSi mixed oxide catalyst gave the highest activity which gave 50% CO conversion at 188 °C and 100% CO conversion at T > 275 °C.

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Section: Methodsmentioning

confidence: 99%

Development of NiFeSi mixed oxide catalysts for CO methanation

2021

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“…Catalyst is the key of Fischer‐Tropsch synthesis process, and developing new catalysts is the most effective way to regulate the distribution of Fischer‐Tropsch synthesis products. Fe, Co, Ni and Ru are commonly used as catalysts for Fischer‐Tropsch synthesis [7,12–15] . Among them, Fe‐based catalysts have been widely used in industrial production because of their wide operating temperature range, high activity, low price, low methane selectivity, and flexible adjustment of product distribution from low‐carbon hydrocarbons to long‐chain hydrocarbons [7,16,17] .…”

Section: Introductionmentioning

confidence: 99%

“…Fe, Co, Ni and Ru are commonly used as catalysts for Fischer-Tropsch synthesis. [7,[12][13][14][15] Among them, Fe-based catalysts have been widely used in industrial production because of their wide operating temperature range, high activity, low price, low methane selectivity, and flexible adjustment of product distribution from low-carbon hydrocarbons to long-chain hydrocarbons. [7,16,17] However, Fe-based catalysts have high WGS activity and are prone to generate more CO 2 , thereby reducing carbon utilization.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Hydrophobically Modified Iron Catalysts with Hexadecyltrimethoxysilane on Fischer‐Tropsch Synthesis

Chen

Meng

et al. 2023

ChemistrySelect

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Hydrophobic modification of Fischer-Tropsch synthesis catalyst can inhibits water gas shift(WGS) reaction and regulates product distribution. Herein, a series of hydrophobic Fe 2 O 3 @SiO 2 -xHDTMS (Hexadecyltrimethoxysilane, HDTMS. x represents the amount of HDTMS.) catalysts with various HDTMS content were synthesized for Fischer-Tropsch synthesis to light hydrocarbons. The Fe 2 O 3 @SiO 2 -xHDTMS catalysts were characterized by X-ray diffractometer(XRD), scanning electron microscope(SEM), transmission electron microscope(TEM), fourier transform infrared spectrometer(FT-IR) and contact angle measuring instrument(CAMI). After HDTMS modification, the hydrophobicity of the catalyst is significantly improved, the selectivity of the catalyst to CO 2 is significantly reduced due to the inhibition of WGS reaction, and the selectivity of hydrocarbon products is significantly improved. This indicates that HDTMS is very suitable as a silanizer for hydrophobic modification of Fischer-Tropsch synthesis catalysts. With the increase of HDTMS content, the hydrophobicity of the catalyst always increased, but the selectivity of CO 2 in Fischer-Tropsch synthesis products decreased first and then increased, and the selectivity of hydrocarbons increased first and then decreased, indicating that the content of HDTMS has a significant impact on the hydrophobicity and catalytic performance of the catalyst.

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“…In a study by de Jong et al [13], small particles of cobalt and nickel were obtained using a flowing gas of 1% NO in helium to flush the reactor during the calcination process. next step after calcination in the catalyst preparation is the reduction of the active metal.…”

Section: Introductionmentioning

confidence: 99%

Effect of Calcination Conditions on the Dispersion of Cobalt Over Re, Ru and Rh Promoted Co/γ-Al2O3 Catalysts

et al. 2017

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The effects of catalyst calcination conditions, such as calcination temperature and calcination atmosphere composition on the dispersion of cobalt particles over Co/γ Al O catalysts for Fischer-Tropsch conversion of synthesis gas are studied. A number of catalysts were prepared by incipient wetness impregnation of 20 wt% of cobalt onto γ Al O and promoted with 0.5 wt% ruthenium, rhenium, and rhodium. Metal dispersions of active metals were studied by chemisorption of carbon monoxide. The highest dispersion for Co/ γ Al O catalyst was achieved by calcination at 400 °C in a flow of N . Co metal dispersion seem to be increased in the calcination steps if a flowing gas was used instead of static calcination conditions. The addition of promoter metals like Ru, Re or Rh enhances the dispersion of the active metal.

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Effect of calcination and reaction conditions on the catalytic performance of Co–Ni/Al2O3 catalyst for CO hydrogenation

Cited by 18 publications

References 23 publications

Development of NiFeSi mixed oxide catalysts for CO methanation

Development of NiFeSi mixed oxide catalysts for CO methanation

The Effect of Hydrophobically Modified Iron Catalysts with Hexadecyltrimethoxysilane on Fischer‐Tropsch Synthesis

Effect of Calcination Conditions on the Dispersion of Cobalt Over Re, Ru and Rh Promoted Co/γ-Al2O3 Catalysts

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