Dimerization of 1-butene in liquid phase reaction: Influence of structure, pore size and acidity of Beta zeolite and MCM-41 mesoporous material

“…Although butene conversion is slightly lower with less acid sites at Particularly, the ATHZ5-Na catalyst has a high amount of acid sites and a lower L/B ratio, which leads to a large amount of hydrocarbons, thus the hydrocarbons on the active sites of the catalyst are difficult to separate. These hydrocarbons further blocked the channels and destructed the acidic sites of the catalyst [56]. Thus, although there is a large amount of intracrystalline mesopores in ATHZ5-Na, it still presents a faster deactivation.…”

Section: Catalytic Performancementioning

confidence: 99%

Improvement of the Catalytic Efficiency of Butene Oligomerization Using Alkali Metal Hydroxide-Modified Hierarchical ZSM-5 Catalysts

Zhang

et al. 2018

Catalysts

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Oligomerization of light olefin is an effective method to produce plentiful liquid fuels. However, oligomerization processes using microporous zeolites have severe problems due to steric hindrance. In this paper, oligomerization of butene using a series of new types of hierarchical HZSM-5 zeolite catalysts is studied. To obtain the modified HZSM-5 catalysts, HZSM-5 is treated with the same concentration of LiOH, NaOH, KOH, and CsOH aqueous solutions, respectively. It is demonstrated that the alkali treatment can effectively modify the acidity properties and hierarchical structure of the HZSM-5 catalyst, which is confirmed by X-ray Diffraction (XRD), X-ray Fluorescence (XRF), Nitrogen Adsorption-desorption Measurements, Transmission Electron Microscopy Investigations (TEM), Ammonia Temperature-programmed Desorption Method (NH 3 -TPD), Pyridine FT-IR, and Thermogravimetric Analysis (TGA). The results show that hierarchical catalysts with interconnected open-mesopores, smaller crystal size, and suitable acidity can better prolong the catalyst lifetime during butene oligomerization. Particularly, the HZSM-5 catalysts treated with CsOH aqueous solution (ATHZ5-Cs) proved to be the most effective catalyst, resulting in approximately 99% conversion of butene and exhibiting C 8 + selectivity of 85% within 12 h. Thus, an appropriate hierarchical catalyst can satisfy the oligomerization process and has the potential to be used as a substitute for the commercial ZSM-5 catalyst.

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“…solid phosphoric acid, [9,24,25] zeolites, [6,[26][27][28][29][30] amorphous silicaalumina [31,32] and other metal oxide catalysts. [33,34] Zeolites and zeotypesa re particularly promising versatile, crystalline, microporousm aterials which may withstand the catalytic reaction conditions and catalystr egeneration treatments (e.g.,t ob urn off coke).…”

Section: Introductionmentioning

confidence: 99%

Mesostructured Catalysts Based on the BEA Topology for Olefin Oligomerisation

et al. 2018

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Mesostructured solid acid catalysts based on the BEA topology were explored for olefin oligomerisation, which is an attractive synthetic route to produce clean, sulfur‐free fuels or fuel additives with reduced aromatics content. Specifically, the oligomerisation of 1‐butene, which may derive from (non‐)renewable sources, was performed under high pressure and continuous‐flow operation. The mesostructured catalysts consisted of a hierarchical zeotype (BEA‐hier) synthesized by a one‐pot approach using a dual‐function template and, on the other hand, a composite (BEA/TUD) possessing zeolite nanocrystallites embedded in a mesoporous matrix synthesised under hydrothermal conditions. The influence of the material properties, catalyst activation temperature and reaction parameters were investigated by combining characterisation, two‐dimensional gas chromatography combined with time‐of‐flight mass spectrometry (ToFMS) studies, and catalytic studies. The catalytic performances were compared to those of commercial nano/microcrystalline zeolites of different topologies and COD‐900 (type of catalyst for the conversion of olefins to distillates process). BEA‐hier performed superiorly in terms of conversion and space–time yields to diesel cut products.

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Dimerization of 1-butene in liquid phase reaction: Influence of structure, pore size and acidity of Beta zeolite and MCM-41 mesoporous material

Cited by 21 publications

References 13 publications

Prins cyclization: Synthesis of compounds with tetrahydropyran moiety over heterogeneous catalysts

Prins cyclization: Synthesis of compounds with tetrahydropyran moiety over heterogeneous catalysts

Improvement of the Catalytic Efficiency of Butene Oligomerization Using Alkali Metal Hydroxide-Modified Hierarchical ZSM-5 Catalysts

Mesostructured Catalysts Based on the BEA Topology for Olefin Oligomerisation

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