H-Beta Molecular Sieve

Product Name H-Beta Molecular Sieve Product Overview Beta molecular sieve (BEA-type zeolite) is a class of microporous aluminosilicate materials characterized by a three-dimensional twelve-membered-ring pore system. Due to its unique topological structure, tunable acidity, and excellent thermal stability, it plays a crucial role in various fields such as modern petroleum refining, fine chemical manufacturing, and environmental catalysis. Its framework is constructed from SiO₄ and AlO₄ tetrahedra connected via shared oxygen atoms; the substitution of silicon atoms by aluminum atoms introduces negative charges into the framework, which are balanced by protons (H⁺) or other cations, thereby forming Brønsted acid centers – the core source of its catalytic activity. Compared to ten-membered-ring zeolites such as ZSM-5, the larger pore size of Beta molecular sieve (approximately 6.6 Å × 6.7 Å) enables it to effectively accommodate larger organic molecules; however, this also presents challenges in controlling product selectivity. Technical Parameter Silicon to aluminum ratio: 10~Full Silicon; Specific Surface Area(m2/g): 400 Pore Diameter (nm): 0.5-0.7; Na2O wt%:<0.05 Compression strength(N): 20-60; Stacking density(g/cm3): 400-600 Appearance: spherical particle Product Features The core structural feature of the Beta molecular sieve lies in its three-dimensional twelve-membered-ring cross-channel system (BEA topology), with pore dimensions of approximately 6.6 Å × 6.7 Å – a size significantly larger than that of ten-membered-ring zeolites such as ZSM-5 – enabling it to effectively accommodate and convert larger organic molecules. The acidity of Beta molecular sieves can be precisely tuned by adjusting the SiO₂/Al₂O₃ molar ratio. High-silica Beta molecular sieves (e.g., SiO₂/Al₂O₃> 100) exhibit stronger hydrophobicity and higher Brønsted acidity, making them suitable for reactions in which the interference of water molecules must be avoided. In terms of functionality, the Beta molecular sieve can serve as an excellent support for constructing multifunctional catalysts. By loading it with metal oxides or bimetallic components, a bifunctional system combining hydrogenation/dehydrogenation and acid-catalytic activities can be developed. Application Fields In the petroleum refining industry, Beta molecular sieve is widely used in hydrogen-isomerization and hydrocracking processes. In the fields of aromatic compound conversion and fine chemical manufacturing, Beta molecular sieves also play a pivotal role. Their large pore size makes them suitable for alkylation, etherification, and co-reaction processes involving large-molecule species. In the field of environmental catalysis, composite catalysts fabricated using Beta molecular sieve as a support demonstrate significant potential.