Nickel on two-dimensional ITQ-2 zeolite as a highly active catalyst for carbon dioxide reforming of methane

Kweon, Sungjoon; Kim, Young Woo; Bae, Jongil; Kim, Eun-Jeong; Park, Min Bum; Min, Hyung‐Ki

doi:10.1016/j.jcou.2022.101921

Cited by 13 publications

(13 citation statements)

References 40 publications

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“…This condition was confirmed as a new diffraction peak revealed at 2θ of 12.25°, 16.41°, 18.88°, 20°, 22.64°, 26.22°, 30.87°, and 33.12°, which corresponded to the nickel phosphate phase (JCPDS card 46-1388) . These peaks were relatively difficult to observe, presumably due to the highly dispersed Ni(H 2 PO 4 ) 2 on the zeolite surface or the pore surface. , As presented in Figure , the main diffractogram of zeolite mineral remained unchanged after modifications, indicating that impregnation did not alter the crystalline zeolite structure …”

Section: Resultsmentioning

confidence: 69%

“… 48 These peaks were relatively difficult to observe, presumably due to the highly dispersed Ni(H 2 PO 4 ) 2 on the zeolite surface or the pore surface. 49 , 50 As presented in Figure 1 , the main diffractogram of zeolite mineral remained unchanged after modifications, indicating that impregnation did not alter the crystalline zeolite structure. 47 …”

Section: Resultsmentioning

confidence: 90%

“…This condition was also linear, with an increased average pore size of the modified zeolite, whereby the zeolite-Ni(H 2 PO 4 ) 2 was higher than zeolite-Ni. Moreover, as can be seen in Table , the total pore volume of parent zeolite also decreased after being modified, which was consistent with previous reports. , Furthermore, the micropore and external surface of parent zeolite were decreased after being modified, and this indicated that the nickel and nickel phosphate species were mostly located at both the micropore and external surface of the zeolite …”

Section: Resultsmentioning

confidence: 99%

“… 61 , 75 Furthermore, the micropore and external surface of parent zeolite were decreased after being modified, and this indicated that the nickel and nickel phosphate species were mostly located at both the micropore and external surface of the zeolite. 49 …”

Section: Resultsmentioning

confidence: 99%

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Enhanced Isopropyl Alcohol Conversion over Acidic Nickel Phosphate-Supported Zeolite Catalysts

et al. 2022

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In this preliminary research, the catalytic activity of isopropyl alcohol conversion to diisopropyl ether through dehydration reaction catalyzed by zeolite-Ni and zeolite-Ni(H2PO4)2 was comparatively described. The natural zeolite was treated with 1% HF and 6 N HCl prior to modifications using the impregnation method. Isopropyl alcohol conversion was examined at a mild temperature of 150 °C for 3.5 h on the reflux system with various catalyst loadings. X-ray diffraction and Fourier transform infrared analysis confirmed the successful impregnation of nickel and nickel phosphate into the zeolite. Scanning electron microscopy analysis revealed a cubic-like structure on zeolite-Ni(H2PO4)2, whereas homogenously distributed nickel species were observed on the zeolite-Ni catalyst. Energy-dispersive X-ray spectroscopy analysis reinforced the accomplishment of zeolite modifications. The N2 physisorption isotherms showed a decline in the surface area and total pore volume of the zeolite because of the blocking of pores. The zeolite-Ni(H2PO4)2 catalyst had higher acidity than unmodified zeolite and zeolite-Ni catalysts, which inherently suggested that the presence of phosphate groups results in higher catalytic activity toward isopropyl alcohol. The highest catalytic activity was attained by 8 mEq/g metal loading zeolite-Ni(H2PO4)2 with isopropyl alcohol conversion of 81.51%, diisopropyl ether yield, and selectivity of 40.77 and 33.16%. The reusability study suggested that the zeolite-Ni(H2PO4)2 catalyst was still active and had sufficient catalytic activity stability toward isopropyl alcohol after the third cycle was reused. This nickel phosphate-based modified zeolite was adequately potential for diisopropyl ether production through isopropyl alcohol dehydration.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Enhanced Isopropyl Alcohol Conversion over Acidic Nickel Phosphate-Supported Zeolite Catalysts

et al. 2022

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“…First, the Lewis and Brønsted biacidic Sn-MWW zeolite was synthesized using a simple top-down isomorphic substitution of Sn after deboronation in borosilicate MWW . Subsequently, another stannosilicate composed of two-dimensional MWW-layers (Sn-MWW(2D)) was prepared through the delamination of the aforementioned Sn-MWW(3D) by the conventional three steps . In addition, two Beta-type stannosilicates were prepared.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Glucose Conversion over Zeolitic Stannosilicates: A Comparative Study of Structural Properties

Cho,

Kweon,

Park

et al. 2023

ACS Sustainable Chem. Eng.

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Equilibrium Study of Carbon Dioxide Reforming of Methane to Syngas

Li,

Wang

2024

Energy Tech

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Fugacity coefficients for the components in the gas mixture are determined using the Soave–Redlich–Kwong (SRK) equation of state. The Gibbs free energy minimization method is employed to determine the equilibrium composition of the components for CO2 reforming of CH4 to syngas. To utilize CO2 efficiently and avoid carbon deposition, CO2 composition in the initial feed should not be greater than 1 (nCH4,0 = 1), and the reaction is preferably operated at atmospheric pressure. Setting nCH4,0:nCO2,0 to 1:1, and increasing nO2,0 in the feed from 0 to 1.0 to adjust the initial composition, results in a decrease in the syngas equilibrium yield, and a increase in both nCO2,e and nH2O,e. The temperature required for complete carbon deposition removal decreased. Considering the effective utilization of CO2 at nCH4,0:nCO2,0 1:1, it is recommended to set nO2,0 in the feed to less than 0.5.

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Nickel on two-dimensional ITQ-2 zeolite as a highly active catalyst for carbon dioxide reforming of methane

Cited by 13 publications

References 40 publications

Enhanced Isopropyl Alcohol Conversion over Acidic Nickel Phosphate-Supported Zeolite Catalysts

Enhanced Isopropyl Alcohol Conversion over Acidic Nickel Phosphate-Supported Zeolite Catalysts

Catalytic Glucose Conversion over Zeolitic Stannosilicates: A Comparative Study of Structural Properties

Equilibrium Study of Carbon Dioxide Reforming of Methane to Syngas

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