Characterization and catalytic performance of mesoporous molecular sieves Al-MCM-41 materials

作者: X. Chen , L. Huang , G. Ding , Q. Li

DOI: 10.1023/A:1018968823654

关键词: Molecular sieveThermogravimetric analysisAcid strengthMesoporous organosilicaFluid catalytic crackingAluminiumMesoporous materialChemistryMCM-41Inorganic chemistry

摘要: Mesoporous Al-MCM-41 materials of different Si/Al ratios have been synthesized and characterized by X-ray powder diffraction, 27Al 29Si MAS NMR, differential thermogravimetric analysis, N2 adsorption measurements, FT-IR catalytic cracking alkanes. The experimental results show that the incorporation aluminium into framework MCM-41 has a great effect on degree long-distance order, surface acidities mesoporous structures materials. With increase content, amounts tetrahedral acid sites samples increase, but strength decreases. exhibit high activity for n-C160 good selectivity producing low carbon alkylenes, particularly i-C4=.

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