二甲醚和甲醇在BEA， MRE和MWW结构的沸石上转化为碳氢化合物

IF 4.2 3区化学 Q2 CHEMISTRY, PHYSICAL

Catalysis Science & Technology Pub Date : 2025-08-26 DOI:10.1039/D5CY00740B

Maria V. Magomedova, Vera A. Ostroumova, Ilya A. Davidov, Ekaterina G. Galanova, Anastasiya V. Starozhitskaya and Anton L. Maximov

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引用次数: 0

摘要

比较了沸石基催化剂BEA/Al2O3、MCM-22/Al2O3、MRE/Al2O3和MFI/Al2O3在340℃、0.1 MPa（二甲醚）和10.0 MPa（甲醇）条件下二甲醚和甲醇转化为烃类的催化性能。BEA/Al2O3、MCM-22/Al2O3和MFI/Al2O3催化剂具有相似的总酸度，表现出相似的活性。但由于分子筛结构的不同，催化剂的稳定性和产物分布有所不同。具有“超级笼”的MCM-22沸石在常压下的C5+液态烃产率达到62%。BEA/Al2O3具有较高比例的介孔，有利于形成较重的碳氢化合物C14-C16，这是航空燃料的组分。mre基催化剂的酸性和活性最低，但对C2-C4烯烃具有较高的选择性和操作稳定性。

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Conversion of dimethyl ether and methanol to hydrocarbons over zeolites with BEA, MRE, and MWW structures

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Conversion of dimethyl ether and methanol to hydrocarbons over zeolites with BEA, MRE, and MWW structures

The catalytic properties of zeolite-based catalysts BEA/Al₂O₃, MCM-22/Al₂O₃, MRE/Al₂O₃, and MFI/Al₂O₃ were compared in the conversion of dimethyl ether (DME) and methanol into hydrocarbons at 340 °C under 0.1 MPa (for DME) and 10.0 MPa (for methanol). Catalysts BEA/Al₂O₃, MCM-22/Al₂O₃, and MFI/Al₂O₃ with comparable total acidity demonstrated similar activity. However, due to differences in zeolite structure, catalyst stability and product distribution varied. The MCM-22 zeolite with “super-cages” enabled a C₅₊ liquid hydrocarbon yield of 62 wt% under atmospheric pressure. BEA/Al₂O₃, with a high fraction of mesopores, facilitated the formation of heavier hydrocarbons C₁₄–C₁₆, components of aviation fuel. The MRE-based catalyst exhibited the lowest acidity and activity but showed high selectivity towards C₂–C₄ olefins and operational stability.

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来源期刊

Catalysis Science & Technology CHEMISTRY, PHYSICAL-

CiteScore

8.70

自引率

6.00%

发文量

587

审稿时长

1.5 months

期刊介绍： A multidisciplinary journal focusing on cutting edge research across all fundamental science and technological aspects of catalysis. Editor-in-chief: Bert Weckhuysen Impact factor: 5.0 Time to first decision (peer reviewed only): 31 days