Comparative study of direct methylation of benzene with methane on cobalt-exchanged ZSM-5 and ZSM-11 zeolites

Hu, Peidong; Nakamura, Koshiro; Matsubara, Hitoshi; Iyoki, Kenta; Yanaba, Yutaka; Okumura, Kazu; Okubo, Tatsuya; Katada, Naonobu; Wakihara, Toru

doi:10.1016/j.apcata.2020.117661

Cited by 15 publications

(3 citation statements)

References 42 publications

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“…Generally, the alkylation of benzene with ethanol proceeds over an acidic catalyst through the carbenium ion mechanism electrophilic substitution on the aromatic . Mainly, on the zeolite catalyst, its Brønsted acidic sites provide the proton to attack ethanol and then generate ethoxy cation and water.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, the alkylation of benzene with ethanol proceeds over an acidic catalyst through the carbenium ion mechanism electrophilic substitution on the aromatic. 49 Mainly, on the zeolite catalyst, its Brønsted acidic sites provide the proton to attack ethanol and then generate ethoxy cation and water. Subsequently, the ethoxy cation reacts with the benzene molecule to form protonated ethylbenzene, which returns the proton to the zeolite and produces the final product ethylbenzene.…”

Section: Synthesis Of Cdm-5 Nanoaggregates Via Interzeolitementioning

confidence: 99%

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Co-Crystalline ZSM-5/ZSM-11 Nanostructures for Alkylation of Benzene with Ethanol

Dong

Yang

Zhao

et al. 2021

ACS Appl. Nano Mater.

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The interzeolite transformation approach has been used extensively for the quick synthesis of zeolites at a lower cost. Herein, an interzeolite transformation method for the quick synthesis of co-crystalline ZSM-5/ZSM-11 (CDM-5) nanoaggregates has been developed by precisely controlling the synthesis parameters and using 1,6-hexamethylenediamine as an organic structure-directing agent. In contrast, the irregular CDM-5 zeolite block obtained from an amorphous aluminosilicate gel takes a longer crystallization time using the conventional method. Combined with the related results of characterization, UV-Raman spectra show that double 6-membered rings in the parent USY zeolite framework are broken, and an ordered aluminosilicate aggregate species (OAAS) containing 4membered rings (4Rs) are formed during the interzeolite transformation. HRTEM and SEM images demonstrate that the block OAAS is dissolved into amorphous nanoparticles, followed by converting into CDM-5 nanoaggregates. These results reveal that an OAAS is essential for the synthesis of CDM-5 nanoaggregates via the interzeolite transformation method. In addition, the CDM-5 nanoaggregate catalyst exhibits superior stability and resistance to carbon deposition in the alkylation reaction of benzene with ethanol compared with the irregular block CDM-5 catalyst.

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Section: Resultsmentioning

confidence: 99%

Section: Synthesis Of Cdm-5 Nanoaggregates Via Interzeolitementioning

confidence: 99%

Co-Crystalline ZSM-5/ZSM-11 Nanostructures for Alkylation of Benzene with Ethanol

Dong

Yang

Zhao

et al. 2021

ACS Appl. Nano Mater.

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“…Nồng độ của RR-195 được xác định và hiệu chuẩn bằng sự thay đổi cường độ của cực đại hấp thụ ở bước sóng 540 nm bằng máy đo quang phổ Vis Lambda 35 UV [7]. Các dải hấp thụ ở số sóng tại 457 và 961 cm -1 đặc trưng cho dao động Si-O (tứ diện) và Si-OH kéo dài [9]. Một số tác giả cũng chỉ ra rằng dải hấp thụ ở số sóng ở 961 cm -1 đặc trưng cho sự thay thế Al 3+ vào khung mạng Si 4+ [10].…”

Section: đáNh Giá Hoạt Tính Xúc Tác Bằng Phản ứNg Phân Hủy Rr-195unclassified

Synthesis of Fe/H-ZSM-5 material by chemical vapor deposition method and its application for degradation of reactive dye

Thu¹,

Ke²,

Anh³

et al. 2021

Vietnam j. catal. adsorp.

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Fe containing nano ZSM-5 composites (Fe/H-ZSM-5) were successfully prepared by chemical vapor deposition method. The physical properties of Fe/H-ZSM-5 were characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), N2 adsorption-desorption isotherm (BET) analysis. Effects of pH and H2O2 concentration were investigated. The best conditions were found to be pH of 3; 0.3 g.L−1 catalyst and reaction time of 60 min at room temperature. The novel Fe/H-ZSM-5 composite exhibited highly photocatalytic performance of RR-195 degradation and the conversion reached to the value of 92.3 % for after 60 min of reaction.

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Frontiers in Arene Chemistry: Direct Methylation of Benzene with Methane on Metal‐Loaded Zeolites

Tsuji¹,

Katada

2023

Industrial Arene Chemistry

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Comparative study of direct methylation of benzene with methane on cobalt-exchanged ZSM-5 and ZSM-11 zeolites

Cited by 15 publications

References 42 publications

Co-Crystalline ZSM-5/ZSM-11 Nanostructures for Alkylation of Benzene with Ethanol

Co-Crystalline ZSM-5/ZSM-11 Nanostructures for Alkylation of Benzene with Ethanol

Synthesis of Fe/H-ZSM-5 material by chemical vapor deposition method and its application for degradation of reactive dye

Frontiers in Arene Chemistry: Direct Methylation of Benzene with Methane on Metal‐Loaded Zeolites

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