Ultrasonic Assisted Synthesis of Bimetal Composite Strontium Oxide/Iron(III) Oxide for the Adsorption Isotherm Analysis of CO2 Capture

Lahuri, Azizul Hakim; Yarmo, Mohd Ambar; Tahari, Maratun Najiha Abu

doi:10.1007/978-981-16-0742-4_12

Cited by 7 publications

(2 citation statements)

References 51 publications

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“…The basic profile of both fresh and reduced 5NixSr/10ZrO 2 +Al 2 O 3 catalysts was investigated by CO 2 desorption (Figures A,B and S4). The fresh 5Ni/10ZrO 2 +Al 2 O 3 catalyst exhibited a diffused desorption peak around 100 °C, corresponding to a weak basic site (CO 2 adsorbed over surface hydroxyl-generating HCO 3 – species) and a broad peak in the region of 250–450 °C, attributed to moderate strength basics sites (CO 2 adsorbed over surface oxide ion). − After reduction, the CO 2 -TPD profile of the reduced catalyst represents the actual basic sites present on the catalyst surface. The reducible surface hydroxyl (constituting weak basic sites) and reducible surface oxide ion (constituting moderate basic sites) are reduced during this process, leading to a decrease in the intensity of basic sites on the reduced catalyst compared to the fresh catalyst.…”

Section: Resultsmentioning

confidence: 99%

Impact of Sr Addition on Zirconia–Alumina-Supported Ni Catalyst for CO_x-Free CH₄ Production via CO₂ Methanation

Abahussain,

Al-Fatesh,

Rajput

et al. 2024

ACS Omega

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Zirconia-alumina-supported Ni (5Ni/ 10ZrO 2 +Al 2 O 3 ) and Sr-promoted 5Ni/10ZrO 2 +Al 2 O 3 are prepared, tested for carbon dioxide (CO 2 ) methanation at 400 °C, and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, surface area and porosity, infrared spectroscopy, and temperature-programmed reduction/desorption techniques. The CO 2 methanation is found to depend on the dispersion of Nickel (Ni) sites as well as the extent of stabilization of CO 2 -interacted species. The Ni active sites are mainly derived from the reduction of 'moderately interacted NiO species'. The dispersion of Ni over 1 wt % Sr-promoted 5Ni/10ZrO 2 +Al 2 O 3 is 1.38 times that of the unpromoted catalyst, and it attains 72.5% CO 2 conversion (against 65% over the unpromoted catalyst). However, increasing strontium (Sr) loading to 2 wt % does not affect the Ni dispersion much, but the concentration of strong basic sites is increased, which achieves 80.6% CO 2 conversion. The 5Ni4Sr/10ZrO 2 +Al 2 O 3 catalyst has the highest density of strong basic sites and the highest concentration of active sites with maximum Ni dispersion. This catalyst displays exceptional performance and achieves approximately 80% CO 2 conversion and 70% methane (CH 4 ) yield for up to 25 h on steam. The unique acidic−basic profiles composed of strong basic and moderate acid sites facilitate the sequential hydrogenation of formate species in the CO x -free CH 4 route.

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Section: Resultsmentioning

confidence: 99%

Impact of Sr Addition on Zirconia–Alumina-Supported Ni Catalyst for CO_x-Free CH₄ Production via CO₂ Methanation

Abahussain,

Al-Fatesh,

Rajput

et al. 2024

ACS Omega

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“…Synthesis and Characterization. An impregnation method from our previous work was adopted in this work [10]. Briefly, the precursor of 20 wt% Ba(NO3)2 was dissolved in 30 mL of distilled water with ethanol about 25 % from the distilled water used.…”

Section: Methodsmentioning

confidence: 99%

Adsorption Isotherm Analysis for CO<sub>2</sub> Capture Using Barium Oxide Impregnated Iron(III) Oxide by Ultrasonic-Assisted Synthesis

Lahuri

Yarmo

Tahari

et al. 2022

KEM

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The barium oxide impregnated iron(III) oxide (BaO/Fe2O3) adsorbent was synthesized by an ultrasonic-assisted method. The adsorbent was calcined at 200-500 °C and its adsorption capacity was measured. The ultrasonic-assisted synthesis generated well-dispersed of BaO on Fe2O3 by giving none of the BaO peaks were observed through the XRD pattern. The most efficient adsorbent of BaO/Fe2O3200 was calcined at 200 °C with adsorption capacity for physisorption and chemisorption of 5.01 and 88.81 mg/g respectively. Besides other carbonate species, it was believed the presence of the hydroxyl group could enhance the sorption by forming bicarbonate upon CO2 chemisorption. It is also possessed a lower desorption range compared to BaO and Fe2O3 alone. The experimental CO2 adsorption isotherm at 25 °C fit better with the Freundlich isotherm model. It implies a favorable adsorption process with multilayer adsorption occurs onto the heterogeneous surface.

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Ni–Sr/TiZr for H₂ from methane via POM: Sr loading & optimization

Alwadai,

Abahussain,

Vadodariya

et al. 2024

RSC Adv.

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Ultrasonic Assisted Synthesis of Bimetal Composite Strontium Oxide/Iron(III) Oxide for the Adsorption Isotherm Analysis of CO2 Capture

Cited by 7 publications

References 51 publications

Impact of Sr Addition on Zirconia–Alumina-Supported Ni Catalyst for CO_x-Free CH₄ Production via CO₂ Methanation

Impact of Sr Addition on Zirconia–Alumina-Supported Ni Catalyst for CO_x-Free CH₄ Production via CO₂ Methanation

Adsorption Isotherm Analysis for CO<sub>2</sub> Capture Using Barium Oxide Impregnated Iron(III) Oxide by Ultrasonic-Assisted Synthesis

Ni–Sr/TiZr for H₂ from methane via POM: Sr loading & optimization

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Ultrasonic Assisted Synthesis of Bimetal Composite Strontium Oxide/Iron(III) Oxide for the Adsorption Isotherm Analysis of CO2 Capture

Cited by 7 publications

References 51 publications

Impact of Sr Addition on Zirconia–Alumina-Supported Ni Catalyst for COx-Free CH4 Production via CO2 Methanation

Impact of Sr Addition on Zirconia–Alumina-Supported Ni Catalyst for COx-Free CH4 Production via CO2 Methanation

Adsorption Isotherm Analysis for CO<sub>2</sub> Capture Using Barium Oxide Impregnated Iron(III) Oxide by Ultrasonic-Assisted Synthesis

Ni–Sr/TiZr for H2 from methane via POM: Sr loading & optimization

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Product

Resources

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Impact of Sr Addition on Zirconia–Alumina-Supported Ni Catalyst for CO_x-Free CH₄ Production via CO₂ Methanation

Impact of Sr Addition on Zirconia–Alumina-Supported Ni Catalyst for CO_x-Free CH₄ Production via CO₂ Methanation

Ni–Sr/TiZr for H₂ from methane via POM: Sr loading & optimization