Dry reforming of methane for syngas production over attapulgite-derived MFI zeolite encapsulated bimetallic Ni-Co catalysts

Liang, Defang; Wang, Yishuang; Chen, M.; Xie, Xuanlan; Li, Chang; Wang, Jun; Liang, Yuan

doi:10.1016/j.apcatb.2022.122088

Cited by 102 publications

(26 citation statements)

References 43 publications

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“…The peaks observed at 882 ( v ), 888 ( v″ ), and 898 ( v‴ ) were attributed to the Ce 4+ (Ce 3d 3/2 ) electronic states, whereas the peaks identified at 900 ( u ), 907 ( u″ ), and 916 ( u‴ ) were associated with Ce 4+ (Ce 3d 5/2 ) electronic states. The peak positions at 884 and 903 labeled as u′ and v′ were attributed to Ce 3+ . , This confirmed the concurrent existence of Ce 3+ and Ce 4+ on the surface of the catalyst. The highest relative concentration of Ce 3+ calculated from the deconvoluted peak area was found on the Ni/CeMg0.5ZnAl and Ni/CeMgAl catalysts (Table ).…”

Section: Resultssupporting

confidence: 63%

“…The Ni 2p 3/2 spectra could be separated into 3 peaks at 852, 855, and 861 eV assigned to the metallic nickel, Ni 2+ phase, and the satellite of complex nickel, respectively. 6,27 The peak intensity of the nickel oxide (Ni 2+ ) phase was higher than that of the metallic nickel phase because of the occurring complex NiO in the NiO−MgO solid solution phase; 28 meanwhile, the nickel oxide was partially reduced to form the metallic nickel at 700 °C, as assured by XRD and H 2 -TPR results.…”

Section: Methodsmentioning

confidence: 92%

“…The Ni 2p 3/2 binding energy peak of the used catalyst could be deconvoluted into three peaks of 853.2, 857.2, and 863.3 which were assigned to the metallic nickel, Ni 2+ state, and the satellite peaks of complex nickel, respectively. 6,27 The oxide quad-blend Ce−Mg−Zn−Al support could help stabilize the 50 The concentration of sp 2 -carbon and sp 3 -carbon hybridization and the relative sp 2 /sp 3 intensity ratio are evaluated from the XPS measurements, as shown in Table S2. The structure of coke deposited on the catalyst surface consisted of sp 2 -and sp 3 -hybridization: a higher amount of coke deposition contained a higher carbon structure of sp 2hybridization.…”

Section: Characteristics Of the Used Ni/zceymgxznalmentioning

confidence: 99%

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Highly Efficient Conversion of Greenhouse Gases Using a Quadruple Mixed Oxide-Supported Nickel Catalyst in Reforming Process

Phichairatanaphong,

Yigit,

Rupprechter

et al. 2023

Ind. Eng. Chem. Res.

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The greenhouse gas reduction as well as the utilization of more renewable and clean energy via a dry reforming reaction is of interest. The impact of a CeMgZnAl oxide quad-blend-supported Ni catalyst on performance and anticoking during dry reforming reactions at 700 °C was studied. A high Ce−Mg/Zn ratio, as seen in the CeMg0.5ZnAl-supported nickel catalyst, enhances lattice oxygen, and the presence of strong basic sites, along with the creation of the carbonate intermediate species, is accompanied by the production of gaseous CO through a gasification reaction between the carbon species and Ni-CO ads-lin site. The phenomena caused the outstanding performance of the Ni/CeMg0.5ZnAl catalyst�CH 4 (84%),CO 2 (83%) conversions, and the H 2 /CO (0.80) ratio; moreover, its activity was also stable throughout 30 h.

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Section: Resultssupporting

confidence: 63%

Section: Methodsmentioning

confidence: 92%

Section: Characteristics Of the Used Ni/zceymgxznalmentioning

confidence: 99%

See 1 more Smart Citation

Highly Efficient Conversion of Greenhouse Gases Using a Quadruple Mixed Oxide-Supported Nickel Catalyst in Reforming Process

Phichairatanaphong,

Yigit,

Rupprechter

et al. 2023

Ind. Eng. Chem. Res.

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“…28−30 The pore structure, high surface area, and high affinity for CO 2 of zeolites are advantageous for DRM reactions. 6,26 Zeolites are also known to be stable catalyst supports, owing to their excellent metal dispersibility. Catalysts based on group 8, 9, and 10 metals, especially Rh, 31−33 Ru, 34−36 and Pt, 37−40 have been reported to be effective in DRM reactions.…”

Section: ■ Introductionmentioning

confidence: 99%

“…As one of these methods, the technology to convert methane into syngas (CO and H 2 ) is attracting attention. It is a valuable raw material in various chemical processes, such as the production of liquid hydrocarbons through the Fischer–Tropsch (FT) reaction and the synthesis of methanol. − The FT process is a series of chemical reactions that convert syngas to liquid hydrocarbons. These reactions occur in the presence of metal catalysts, typically at 150–300 °C and pressure of one to several tens of atmospheres.…”

Section: Introductionmentioning

confidence: 99%

Dry Reforming of Methane with Suppressed Carbon Deposition over Cr- and Ni-Loaded Dealuminated β Zeolites

Tamura,

Murata,

Sumi

et al. 2023

Energy Fuels

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Dry reforming of methane (DRM) is an endothermic reaction that consumes energy during operation. In Ni-based catalysts, carbon produced by side reactions leads to catalyst deactivation and damage to the reactor tube. We have developed a catalyst that maintains its activity and suppresses carbon deposition at a low temperature (873 K). New catalysts were synthesized by loading Cr and Ni onto dealuminated β zeolites. The peak shifts in the X-ray diffraction (XRD) measurements suggested that the introduced Cr and Ni species interacted with the zeolite framework. UV−vis spectra showed that the loaded Cr interacted with the zeolite was present as Cr 6+ . The synthesized catalysts were applied to the DRM reaction. As a result, the Cr-loaded catalysts had lower carbon deposition than only the Ni-loaded catalyst. The Cr species mainly contributed to the suppression of the methane decomposition reaction, leading to a much lower coke deposition and a more selective DRM reaction. This study provides a new strategy for catalyst design to suppress coke deposition and selective DRM reactions.

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Toward a better understanding of polymeric aluminum‐modified attapulgite for the efficient removal of low phosphorus concentration

Yang,

Chen,

et al. 2024

Water Environment Research

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Attapulgite (ATP) is a biocompatible clay mineral that efficiently absorbs water. It is widely used in water treatment due to its environmental friendliness and cost‐effectiveness. This study aimed to develop a volume‐expansion structure‐based attapulgite flocculant (VES‐ATP) using aluminum salt and attapulgite (ATP) under alkaline conditions, specifically for the treatment of water containing low levels of phosphorus. The VES‐ATP was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. The removal of phosphorus by the VES‐ATP was conducted by varying the mass ratio of Al to attapulgite (denoted as RmAl/mATP), ATP dosage, and pH. The results showed that the VES‐ATP had a good expansion and dispersibility in the presence of alkalized aluminum species. The basicity as the molar ratio of OH to Al (0.8 or 1.6) determined the expansion feasibility, and the coverage degree of Al onto ATP, as indicated by the mass ratio of Al to attapulgite (denoted as RmAl/mATP), determined Al flocculation efficiency. Higher values such as RmAl/mATP = 4:1 and 2:1 may result in a better flocculation. Low phosphorus treatment was successfully achieved through Al flocculation and ATP adsorption, including complexation, hydrogen bonding, and electrostatic attraction. As expected, the VES‐ATP generated larger size flocs with a bigger fractal dimension than that with the sole Al flocculation. As a result, the total phosphorus could be reduced to the level below 5 μg/L. It is more efficient in the pH range of 5–9. Overall, the coupling of aluminum and attapulgite has significantly enhanced both purification capabilities of phosphorus.Practitioner Points Polymeric aluminum‐modified attapulgite was efficient for removal of low phosphorus concentration. Phosphorus concentrations can be reduced to below 5 μg/L. Polymeric aluminum and attapulgite are both safe, and this technology is suitable for water treatment.

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Dry reforming of methane for syngas production over attapulgite-derived MFI zeolite encapsulated bimetallic Ni-Co catalysts

Cited by 102 publications

References 43 publications

Highly Efficient Conversion of Greenhouse Gases Using a Quadruple Mixed Oxide-Supported Nickel Catalyst in Reforming Process

Highly Efficient Conversion of Greenhouse Gases Using a Quadruple Mixed Oxide-Supported Nickel Catalyst in Reforming Process

Dry Reforming of Methane with Suppressed Carbon Deposition over Cr- and Ni-Loaded Dealuminated β Zeolites

Toward a better understanding of polymeric aluminum‐modified attapulgite for the efficient removal of low phosphorus concentration

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