合成方法对BEA沸石甲苯歧化理化性质及催化活性的影响

IF 1.3 4区工程技术 Q3 CHEMISTRY, ORGANIC Petroleum Chemistry Pub Date : 2024-10-30 DOI:10.1134/S096554412406001X

O. A. Ponomareva, E. P. Andriako, A. P. Dubtsova, N. K. Vdovchenko, V. A. Vorobkalo, I. V. Dobryakova, L. I. Rodionova, O. V. Shutkina, I. I. Ivanova

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引用次数: 0

摘要

在氟化物和碱性介质中，采用蒸汽辅助（SAC）和水热结晶（HTC）制备了一系列SiO2/Al2O3比约为50的bea型沸石。通过低温氮吸附、XRD、SEM、XRF和NH3-TPD表征了其理化性质。研究了液相甲苯歧化反应的催化性能。sac合成的样品具有较高的酸位点浓度。SAC在碱性培养基中制备的BEAs具有较高的甲苯歧化活性。在含氟介质中，通过蒸汽辅助结晶和水热结晶两种方法合成的样品在活性上具有可比性。

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Effects of Synthesis Method on the Physicochemical Properties and Catalytic Activity of BEA Zeolite in Toluene Disproportionation

A series of BEA-type zeolites with SiO₂/Al₂O₃ ratios of about 50 were synthesized by steam-assisted (SAC) and hydrothermal crystallization (HTC) in fluoride and alkaline media. Their physicochemical properties were characterized by low-temperature nitrogen adsorption, XRD, SEM, XRF, and NH₃-TPD. The catalytic performance was investigated in liquid-phase toluene disproportionation. The SAC-synthesized samples were distinguished by a higher concentration of acid sites. The BEAs prepared by SAC in alkaline media exhibited a higher activity in toluene disproportionation. The samples synthesized in fluoride media, both by steam-assisted and hydrothermal crystallization, proved to be comparable in activity.

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来源期刊

Petroleum Chemistry 工程技术-工程：化工

CiteScore

2.50

自引率

21.40%

发文量

102

审稿时长

6-12 weeks

期刊介绍： Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas. Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.