The Effect of Preparation Method of Ni-Supported SiO2 Catalysts for Carbon Dioxide Reforming of Methane

Ren, Huaping; Ding, Siyi; Ma, Qiang; Song, Wei; Zhao, Yuzhen; Liu, Jiao; He, Yeming; Tian, Shichao

doi:10.3390/catal11101221

Cited by 8 publications

(4 citation statements)

References 45 publications

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“…Following the evaluation, the catalyst exhibited a high BET surface area of 229.4 m 2 ·g –1 , an essential feature for improving the material’s mass transfer and catalytic activity. Interestingly, such a result is higher than that observed for similar homemade catalysts found in the literature, showing that the fat covering has not expressively affected the textural properties of the material. Also, a pore volume of 40.4 Å was calculated.…”

Section: Resultscontrasting

confidence: 61%

Cooperative Catalytic Transfer for One-Pot Hydrolysis/Hydrogenation of Refined Palm Oil Using Formic Acid as a Hydrogen Source

Pinzon,

Romano,

Garcia

et al. 2024

Ind. Eng. Chem. Res.

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Significant biorefinery operations demand hydrolysis and hydrogenation reactions that require high hydrogen pressures. However, the necessity of reducing our reliance on fossil fuels for hydrogen generation drives the development of alternative hydrogen source technologies. Thus, employing hydrogen donor molecules under milder conditions is a promising approach. Herein, we present an industrially viable approach to producing saturated free fatty acids through a one-pot hydrolysis and hydrogenation reaction. In this process, formic acid (FA) acts as the hydrogen donor, while a commercial Ni/SiO 2 catalyst facilitates the hydrogenation of the fatty acid using the hydrogen generated during the decomposition of the FA. The reaction conditions were 190 °C, 20 bar of initial pressure, 750 rpm, 5:1 molar water/oil ratio, and 3 wt % Ni/SiO 2 catalyst (as a function of oil mass) using two different levels of FA. It was found that FA is a suitable catalyst for the hydrolysis reaction of palm oil, achieving a high conversion of free fatty acids. Also, an average iodine value of 19 gI 2 /100 g was obtained, and an extent of hydrogenation of 64% was achieved, indicating partial hydrogenation. The GC-FID results showed a selectivity toward hydrogenation of polyunsaturated fatty acid chains and low conversion of oleic acid. Also, we showed that qualitative and semiquantitative analyses validate the results, elucidating the conversion of triglycerides into fatty acids and providing insights into compound compositions. Infrared spectroscopy and thin-layer chromatography support these findings. Thus, such results are a promising route for saturated fatty acid production in a one-pot reaction.

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Section: Resultscontrasting

confidence: 61%

Cooperative Catalytic Transfer for One-Pot Hydrolysis/Hydrogenation of Refined Palm Oil Using Formic Acid as a Hydrogen Source

Pinzon,

Romano,

Garcia

et al. 2024

Ind. Eng. Chem. Res.

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“…As expected, all the catalysts showed significant weight losses, which was consistent with the CDR performance. As shown in Figure 6, a visible weight increase of around 250-600 • C was observed for all the catalysts, which can be attributed to the oxidation of metal Ni to NiO in the air atmosphere [48,49]. The weight increase in the Ni/SBA-15-M, Ni/SBA-15-M-C, and Ni/SBA-15-I are 0.7%, 1.5%, and 2.5%, respectively.…”

Section: Characterization Of Used Catalystsmentioning

confidence: 85%

Dry Reforming of Methane over Ni-Supported SBA-15 Prepared with Physical Mixing Method by Complexing with Citric Acid

Ren,

Tian,

Ding

et al. 2023

Catalysts

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Ni-supported SBA-15 catalysts were prepared by physical mixing of Ni(NO3)2·6H2O and SBA-15 (Ni/SBA-15-M) and in the presence of citric acid as the complexing agent (Ni/SBA-15-M-C). Moreover, an Ni-supported SBA-15 catalyst was also prepared by the conventional incipient impregnation method (Ni/SBA-15-I). All the catalysts were systematically evaluated for carbon dioxide reforming of methane (CDR) at CO2/CH4 = 1.0, gas hourly space velocity of 60,000 mL·g−1·h−1, and reaction temperature of 700 °C. The characterization results show that the Ni particle size of Ni/SBA-15-M-C is significantly smaller than that of Ni/SBA-15-M due to the coordination effect of citric acid and Ni2+. Consequently, the Ni/SBA-15-M-C exhibits superior anti-coking and anti-sintering during the CDR-operated period because of the higher Ni dispersion and stronger Ni–support interaction. Compared to the Ni/SBA-15-I, the physical mixing of nickel salt and mesoporous material for preparing of Ni-based catalyst is easy to operate, although the crystal size and catalytic performance of Ni/SBA-15-C are very similar to that of Ni/SBA-15-M-I. Thus, the efficient and easily controlled catalyst structure makes the physical mixing strategy very promising for preparing highly active and stable CDR catalysts.

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“…This method promotes the formation of a NiMo/SiO 2 catalyst toward a high liquid product yield in waste frying oil hydrocracking. Ren et al proposed glycine as a complexing agent to produce a well-dispersed metal-supported Ni/SiO 2 catalyst. Other complexing agents, such as ETDA, citric acid, and ethylene diamine, have been employed to enhance the SiO 2 catalyst by providing excellent catalytic features. − …”

Section: Introductionmentioning

confidence: 99%

Enhancement of Catalytic Activity on Crude Palm Oil Hydrocracking over SiO₂/Zr Assisted with Potassium Hydrogen Phthalate

et al. 2023

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In this study, the catalytic activity of bifunctional SiO2/Zr catalysts prepared by template and chelate methods using potassium hydrogen phthalate (KHF) for crude palm oil (CPO) hydrocracking to biofuels was investigated. The parent catalyst was successfully prepared by the sol–gel method, followed by the impregnation of zirconium using ZrOCl2·8H2O as a precursor. The morphological, structural, and textural properties of the catalysts were examined using several techniques, including electron microscopy energy-dispersive X-ray with mapping, transmission electron microscopy, X-ray diffraction, particle size analyzer (PSA), N2 adsorption–desorption, Fourier transform infrared-pyridine, and total and surface acidity analysis using the gravimetric method. The results showed that the physicochemical properties of SiO2/Zr were affected by different preparation methods. The template method assisted by KHF (SiO2/Zr-KHF2 and SiO2-KHF catalysts) provides a porous structure and high catalyst acidity. The catalyst prepared by the chelate method assisted by KHF (SiO2/Zr-KHF1) exhibited excellent Zr dispersion toward the SiO2 surface. The modification remarkably enhanced the catalytic activity of the parent catalyst in the order SiO2/Zr-KHF2 > SiO2/Zr-KHF1 > SiO2/Zr > SiO2-KHF > SiO2, with sufficient CPO conversion. The modified catalysts also suppressed coke formation and resulted in a high liquid yield. The catalyst features of SiO2/Zr-KHF1 promoted high-selectivity biofuel toward biogasoline, whereas SiO2/Zr-KHF2 led to an increase in the selectivity toward biojet. Reusability studies showed that the prepared catalysts were adequately stable over three consecutive runs for CPO conversion. Overall, SiO2/Zr prepared by the template method assisted by KHF was chosen as the most prominent catalyst for CPO hydrocracking.

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The Effect of Preparation Method of Ni-Supported SiO2 Catalysts for Carbon Dioxide Reforming of Methane

Cited by 8 publications

References 45 publications

Cooperative Catalytic Transfer for One-Pot Hydrolysis/Hydrogenation of Refined Palm Oil Using Formic Acid as a Hydrogen Source

Cooperative Catalytic Transfer for One-Pot Hydrolysis/Hydrogenation of Refined Palm Oil Using Formic Acid as a Hydrogen Source

Dry Reforming of Methane over Ni-Supported SBA-15 Prepared with Physical Mixing Method by Complexing with Citric Acid

Enhancement of Catalytic Activity on Crude Palm Oil Hydrocracking over SiO₂/Zr Assisted with Potassium Hydrogen Phthalate

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The Effect of Preparation Method of Ni-Supported SiO2 Catalysts for Carbon Dioxide Reforming of Methane

Cited by 8 publications

References 45 publications

Cooperative Catalytic Transfer for One-Pot Hydrolysis/Hydrogenation of Refined Palm Oil Using Formic Acid as a Hydrogen Source

Cooperative Catalytic Transfer for One-Pot Hydrolysis/Hydrogenation of Refined Palm Oil Using Formic Acid as a Hydrogen Source

Dry Reforming of Methane over Ni-Supported SBA-15 Prepared with Physical Mixing Method by Complexing with Citric Acid

Enhancement of Catalytic Activity on Crude Palm Oil Hydrocracking over SiO2/Zr Assisted with Potassium Hydrogen Phthalate

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Enhancement of Catalytic Activity on Crude Palm Oil Hydrocracking over SiO₂/Zr Assisted with Potassium Hydrogen Phthalate