Synthesis of Ni-Modified ZSM-5 Zeolites and Their Catalytic Performance in n-Octane Hydroconversion

Wei, Qiang; Zhang, Pengfei; Liu, Xiaodong; Huang, Weixing; Fan, Xiayun; Yan, Yun‐Fei; Zhang, Rongxun; Wang, Lin; Zhou, Yasong

doi:10.3389/fchem.2020.586445

Cited by 27 publications

(17 citation statements)

References 35 publications

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“…This demonstrates a high degree of congruence with the pore pattern depicted in Fig. 4(b),(c), which agrees with the study by Wei et al 54 The corresponding pore-size distribution diagrams for adsorption and desorption are shown in Fig. 4(b),(c).…”

Section: Textural Propertiessupporting

confidence: 91%

“…The isotherms showed a hysteresis branch, which corresponds to a Langmuir isotherm (type IV) based on the IUPAC categorization, and the adsorption and desorption branches practically intersected at relatively low pressure, showing that the macro-mesoporous structures were well conserved after metal incorporation by the impregnation technique. [52][53][54] The adsorbed volume increased continuously with relative pressure. The improved adsorption in the pressure range of 0.4P/P 0 has occurred from the adsorption of nitrogen within and intra-crystalline mesopores as a result of the aggregation of the nanocrystals.…”

Section: Textural Propertiesmentioning

confidence: 99%

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Catalytic conversion of bioethanol over cobalt and nickel‐doped HZSM‐5 zeolite catalysts

Anekwe,

Oboirien,

Isa

2023

Biofuels Bioprod Bioref

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This study focuses on the use of H‐ZSM‐5 catalyst modified with transition metals for the conversion of ethanol into liquid fuel hydrocarbons. The HZSM‐5 catalyst was synthesized hydrothermally, and the transition metal (0.5 wt%) was incorporated by the incipient wetness impregnation method. The synthesized catalysts were tested in a fixed‐bed reactor at varying weight hourly space velocities (WHSVs) and temperatures to investigate their effects on the selectivity of the liquid hydrocarbon product. The pure and metal‐doped catalysts were characterized using XRD, FTIR, SEM–EDX, PSD, BET, N2 adsorption–desorption, and NH3‐TPD. The metal species were evenly dispersed on the catalyst support without affecting the porous framework significantly. The modification did not alter the morphology of the catalyst; however, the particle size was altered slightly. The pore distribution plot confirms the hierarchical porous framework of the catalyst. This unique feature facilitates internal diffusion and accelerates mass transfer, improving the selectivity and distribution of the liquid product. The catalytic evaluation showed ethanol conversion of more than 97% for all catalysts tested. A low space velocity (5 h−1) favored gaseous (C1‐C4) hydrocarbons, but more liquid products (C5+) were generated at 12 h−1 (at 350 and 400 °C), with metal‐doped catalysts showing higher selectivity (> 79%). In comparison with the unmodified catalysts, the metal‐doped catalysts enhanced the production of aromatics (benzene), with Ni/HZSM‐5 showing higher selectivity (> 4%). This study showed that the synthesized catalysts are active in the selective production of liquid hydrocarbon and improve the transformation of ethanol to fuel‐range hydrocarbons.

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Section: Textural Propertiessupporting

confidence: 91%

Section: Textural Propertiesmentioning

confidence: 99%

Catalytic conversion of bioethanol over cobalt and nickel‐doped HZSM‐5 zeolite catalysts

Anekwe,

Oboirien,

Isa

2023

Biofuels Bioprod Bioref

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“…The catalytic effect close to that of the monometallic Ni and Co loadings indicated that Ni and Co had a stronger adsorption capacity for fatty acids, which decreased the utilization of Mo active sites due to the competitive effect, and this contrast has been reported in published work. 25 In contrast, Mo 0.02 Cu 0.01 /Z-0.2M showed superior catalytic activity over monometallic loading catalysts Mo 0.02 /Z-0.2M and Cu 0.01 /Z-0.2M with a high overall TEX yield of 50.19 wt %, including 10.30 wt % in toluene, 3.82 wt % in ethylbenzene, and 36.07 wt % in xylene. It can be seen that Mo and Cu showed a certain synergistic effect.…”

Section: = × ×mentioning

confidence: 88%

Mo, Cu Bimetallic Loaded Hierarchical Pore ZSM-5 Catalysts for the Hydrothermal Aromatization of Algal Bio-Oil Model Compounds

Gong

Lü

et al. 2022

Ind. Eng. Chem. Res.

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In this work, the hierarchical pore HZSM-5 zeolite was synthesized by the method of alkali treatment, and the bimetallic loading of Mo and Cu was investigated for the hydrothermal aromatization of stearic acid. After alkali treatment, the pore size of HZSM-5 increased, but the acid sites decreased. The metal loading reintroduced the Lewis acid sites, greatly increasing the ratio to Brönsted acid sites. Therefore, the treated catalyst achieved higher hydrothermal stability while maintaining the high activity of hydrothermal aromatization of stearic acid. Mo0.02Cu0.01/Z-0.2M achieved excellent activity in the stearic acid hydrothermal aromatization with a high overall TEX (toluene, ethylbenzene, and xylenes) yield of 50.19 wt %, including 10.30 wt % toluene, 3.82 wt % ethylbenzene, and 36.07 wt % xylene. In addition, Mo0.02Cu0.01/Z-0.2M still showed excellent catalytic activity while applied in the system of the simulated microalgal bio-oil. As the reactant changed to the mixture of stearic acid and hexadecanamide, an overall TEX yield of 34.11 wt % was obtained at 450 °C. These results demonstrate the excellent hydrothermal aromatization ability of the MoCu-supported hierarchical pore ZSM-5 zeolite, which provides the potential to produce value-added chemicals from algal biomass.

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“…ZSM-5 zeolite is a novel type of molecular sieve that contains organic amine cations synthesized by Mobil in the late 1960s. − Its exceptional catalytic performance was attributed to its unique pore structure, adjustable acidic sites, and hydrothermal stability, which made it a promising catalyst in the petrochemical industry with increasingly diverse applications. − ,, Meanwhile, it exhibited excellent catalytic performance in the esterification process . Therefore, ZSM-5 molecular sieves were commonly utilized as either carrier materials or direct catalysts in catalysis studies.…”

Section: Introductionmentioning

confidence: 99%

Resource Utilization of Waste Cooking Oil Catalyzed by Na₂CO₃/ZSM-5

Chen,

He,

Liu

et al. 2023

ACS Omega

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A catalyst with a simple synthetic process and good catalytic performance was prepared using Na 2 CO 3 as the active component and ZSM-5 as the carrier for the resource utilization of waste cooking oil. The structure of Na 2 CO 3 /ZSM-5 was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy, and the effects of parameters such as Na 2 CO 3 loading, catalyst percentage, and reaction time on the yield of fatty acid methyl esters were investigated. The results showed that the conversion of waste cooking oil to fatty acid methyl esters yielded up to 96.89% when the Na 2 CO 3 loading was 35%, the reaction temperature was 65 °C, the reaction time was 2 h, and the catalyst percentage was 1 wt %. The Na 2 CO 3 /ZSM-5 catalyst could be used to replace H 2 SO 4 or NaOCH 3 in the industrial treatment of waste cooking oil for its resource utilization.

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Synthesis of Ni-Modified ZSM-5 Zeolites and Their Catalytic Performance in n-Octane Hydroconversion

Cited by 27 publications

References 35 publications

Catalytic conversion of bioethanol over cobalt and nickel‐doped HZSM‐5 zeolite catalysts

Catalytic conversion of bioethanol over cobalt and nickel‐doped HZSM‐5 zeolite catalysts

Mo, Cu Bimetallic Loaded Hierarchical Pore ZSM-5 Catalysts for the Hydrothermal Aromatization of Algal Bio-Oil Model Compounds

Resource Utilization of Waste Cooking Oil Catalyzed by Na₂CO₃/ZSM-5

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Synthesis of Ni-Modified ZSM-5 Zeolites and Their Catalytic Performance in n-Octane Hydroconversion

Cited by 27 publications

References 35 publications

Catalytic conversion of bioethanol over cobalt and nickel‐doped HZSM‐5 zeolite catalysts

Catalytic conversion of bioethanol over cobalt and nickel‐doped HZSM‐5 zeolite catalysts

Mo, Cu Bimetallic Loaded Hierarchical Pore ZSM-5 Catalysts for the Hydrothermal Aromatization of Algal Bio-Oil Model Compounds

Resource Utilization of Waste Cooking Oil Catalyzed by Na2CO3/ZSM-5

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Resource Utilization of Waste Cooking Oil Catalyzed by Na₂CO₃/ZSM-5