Catalytic Cracking of n-Dodecane over Alkali-Metal-Modified ZSM-5 Zeolites

IF 1.3 4区工程技术 Q3 CHEMISTRY, ORGANIC Petroleum Chemistry Pub Date : 2024-12-19 DOI:10.1134/S0965544124080036

A. S. Giliazutdinova, T. P. Sorokina, O. V. Potapenko, V. P. Doronin, D. N. Ogurtsova, V. A. Koveza

引用次数: 0

Abstract

The physicochemical properties of ZSM-5 zeolite samples modified with alkali metal cations (e.g., Li⁺, Na⁺, K⁺, and Cs⁺) were characterized. It was demonstrated that increasing the metal load led to a decrease in the textural properties of the zeolite such as specific surface area, total pore volume, and micropore volume; furthermore, it reduced the total concentration of acid sites by 23–25% (at 0.72 × 10^–2 mol % potassium or 0.38 × 10^–2 mol % cesium). In the cracking of n-dodecane, the modification of ZSM-5 with 2.34 × 10^–2 mol% cesium enhanced the yield of light olefins up to 40.1 wt %, which is comparable with the value achieved by a phosphorus-based ZSM-5 sample (40.3 wt %).

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正十二烷在碱金属改性ZSM-5沸石上的催化裂化

采用碱金属阳离子（Li+、Na+、K+、Cs+）对ZSM-5分子筛进行了理化性质表征。结果表明，金属负载的增加导致沸石的结构性能如比表面积、总孔体积和微孔体积的降低；此外，在0.72 × 10-2 mol %钾或0.38 × 10-2 mol %铯时，酸位点的总浓度降低了23-25%。在正十二烷的裂解过程中，用2.34 × 10-2 mol%的铯对ZSM-5进行改性，使轻烯烃的收率提高到40.1% wt %，与磷基ZSM-5样品的收率（40.3% wt %）相当。

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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.