Effect of preparation method on the bimetallic NiCu/SAPO-11 catalysts for the hydroisomerization of n-octane

Yang, Zhichao; Liu, Yunqi; Li, Yanpeng; Zeng, Lingyou; Li, Zhi; Liu, Xueying; Liu, Chenguang

doi:10.1016/j.jechem.2017.10.003

Cited by 30 publications

(13 citation statements)

References 41 publications

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“…Specifically, a better reducibility was observed when Ni was impregnated in a second step (highest temperature peak: 215 °C for the 15Ni–15CuZr catalyst and 235 °C for the 30Ni–15CuZr catalyst) (see Figure ), while a higher reduction temperature was detected when Ni was impregnated first (250 °C for the 15Cu–15NiZr catalyst and 310 °C for the 15Cu–30NiZr catalyst). According to the literature, the metal impregnated in the first step records a stronger interaction with the support. When impregnating Ni first, there is a higher interaction between Ni and ZrO 2 , resulting in a higher reduction temperature.…”

Section: Resultsmentioning

confidence: 99%

Ni–Cu Bimetallic Catalytic System for Producing 5-Hydroxymethylfurfural-Derived Value-Added Biofuels

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Agirre

et al. 2020

ACS Sustainable Chem. Eng.

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Biomass is the only renewable carbon source capable of replacing conventional production of chemicals and fuels derived from nonrenewable resources. The cellulose monomers derived from lignocellulosic biomass can be transformed into 5-hydroxymethylfurfural (HMF), which can be further converted into 2,5-dimethylfuran (DMF) and 2,5-dimethyltetrahydrofuran (DMTHF). These products can be used as substitutes for standard gasoline or as additives. This study has shown that by using Ni–Cu catalysts supported on ZrO2, DMF can be obtained with a yield of 70% after 25 h on stream. Experiments were carried out in a continuous fixed-bed reactor, and complete HMF conversion was achieved by the formation of Ni–Cu species. The importance of Ni active sites in the hydrogenation of DMF to obtain DMTHF was shown, observing how the progressive Ni oxidation phenomenon during the reaction favors DMF production to the detriment of DMTHF. Catalyst evolution was corroborated by different characterization techniques after carrying out several experiments with different durations.

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Section: Resultsmentioning

confidence: 99%

Ni–Cu Bimetallic Catalytic System for Producing 5-Hydroxymethylfurfural-Derived Value-Added Biofuels

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Requies

Agirre

et al. 2020

ACS Sustainable Chem. Eng.

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“…On bifunctional catalysts, the reducibility of active metals can effectively reflect the interaction between active metals and supports ( Yang Z et al, 2019 ). As a result, H 2 -TPR characterization was used to investigate the reducibility of the active metals on the catalysts.…”

Section: Resultsmentioning

confidence: 99%

Hydroisomerization of n-Hexadecane Over Nickel-Modified SAPO-11 Molecular Sieve-Supported NiWS Catalysts: Effects of Modification Methods

et al. 2022

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The complexation-excessive impregnation modification method, which was original in this study, and the ion-exchange method and the in situ modification method were used to synthesize Ni-modified SAPO-11 molecular sieves. With the Ni-modified SAPO-11 samples as support, the corresponding NiWS-supported catalysts for the hydroisomerization of n-hexadecane were prepared. The effects of Ni-modification on SAPO-11 characteristics and the active phase were studied. The structure, morphology, and acidity of SAPO-11, as well as the interaction between active metals and support, the morphology, dispersibility, and stacking number of the active phase, were all changed by Ni-modification methods. The complexation-excessive impregnation modification method deleted a portion of Al from SAPO-11 molecular sieves while simultaneously integrating Ni into the skeletal structure of the surface layer of SAPO-11 molecular sieves, considerably enhancing the acidity of SAPO-11 molecular sieves. Furthermore, during dealumination, ethylenediaminetetraacetic acid generated more mesoporous structures and increased the mesoporous volume of SAPO-11 molecular sieves. Because the complexation-excessive impregnation modification method increased the amount of Ni in the surface framework of the SAPO-11 molecular sieve, it has weakened the interaction between the active phase and the support, improved the properties of the active phase, and greatly improved the hydroisomerization performance of NiW/NiSAPO-11. The yield of i-hexadecane of NiW/NiSAPO-11 increased by 39.3% when compared to NiW/NiSAPO-11. It presented a realistic approach for increasing the acidity of SAPO-11, reducing the interaction between active metals and support, and improving the active phase stacking problem.

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“…Hydroisomerization is one of the most important catalytic processes in the petroleum chemical industry, and is mainly used to produce high quality petroleum products such as high quality fuel oil and high grade lubricating oil. 1–6 Hydroisomerization catalysts are usually metal-acid bifunctional catalysts, where the metal active centers play a role in hydrogenation and dehydrogenation, and the acidic active centers play a role in isomerization. 7–10 SAPO-11 molecular sieves have been widely used in hydroisomerization due to their mild acidity and appropriate pore structure, and have high activity and selectivity for isomerization of hydrocarbons as an acidic active center.…”

Section: Introductionmentioning

confidence: 99%

Hydroisomerization of 1-octene utilizing hierarchical SAPO-11-supported Ni catalysts: effect of the alkyl chain length of the mesoporogen

et al. 2022

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Effect of preparation method on the bimetallic NiCu/SAPO-11 catalysts for the hydroisomerization of n-octane

Cited by 30 publications

References 41 publications

Ni–Cu Bimetallic Catalytic System for Producing 5-Hydroxymethylfurfural-Derived Value-Added Biofuels

Ni–Cu Bimetallic Catalytic System for Producing 5-Hydroxymethylfurfural-Derived Value-Added Biofuels

Hydroisomerization of n-Hexadecane Over Nickel-Modified SAPO-11 Molecular Sieve-Supported NiWS Catalysts: Effects of Modification Methods

Hydroisomerization of 1-octene utilizing hierarchical SAPO-11-supported Ni catalysts: effect of the alkyl chain length of the mesoporogen

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