tailieunhanh - Post-synthesis design of hierarchical ZSM-5 materials for optimal catalytic performance in the cracking of petroleum feedstock

ZSM-5 zeolites are widely used as catalysts in the oil refi ning and petrochemical industry due to their outstanding catalytic performance. Despite their undisputed applications, the relative small pore size of ZSM-5 zeolites often imposes intra-crystalline diff usion limitations for reactant molecules, provoking the lower catalyst utilisation. To alleviate such limitations, in this work, an additional network of mesopores has been introduced by the post-synthesis modifi cation. It was found that a hierarchical ZSM-5 material with the large fraction of mesopores (297m2 /g) coupled to the preservation of microporous characteristics (strong Brønsted) can be optimally prepared by base treatment in NaOH and subsequent acid washing in HCl. The gas phase cracking of cumene, carried out at 250o C as a model reaction to test the spacious properties, revealed that the introduction of mesoporosity enhanced the utilisation of active acid sites mostly located inside the micropores of ZSM-5, consequently the superior cumene cracking activity. Thus, the advantages of ZSM-5 zeolites (strong acidity) and mesostructured materials (high accessibility) can be combined to create advanced hierarchical ZSM-5 catalysts for petroleum processing. | Post-synthesis design of hierarchical ZSM-5 materials for optimal catalytic performance in the cracking of petroleum feedstock

• Hoá dầu
• Post synthesis design
• Hierarchical ZSM 5 materials
• Optimal catalytic performance
• The cracking of petroleum feedstock
• Catalytic cracking
• Chemical EngineeringScience
• Iron oxide catalyst
• Catalytic activity
• OrganicGeochemistry
• ChemicalEngineering
• Mesoporous materials
• Fluid catalytic cracking
• Nanoporous materials
• Zeolite catalysis
• Catalyst testing
• FCC additives
• Catalyst deactivation
• Inactive matrices
• Engineering Chemistry
• Aluminum chlorohydrate solutions
• Hydroprocessed mixture
• Zeolites in active
• Công nghệ hóa
• Vegetable oil sludge
• HY catalyst
• Hóa hữu cơ
• Dầu hạt thực vật
• Journal of Chemistry
• Tungstophosphoric acid
• GC MS analysis
• Low density polyethylene (LDPE)
• TPA loaded kaolin catalysts
• Catalysts preparation
• FCC catalysts
• Structural properties
• Ammonia adsorbed
• Microporous Solids
• Economic evaluation
• Synthesis of nanozeolites
• Synthesis of nanofaujasite
• Qrganic solvents
• Crystallization medium
• Characterization of catalysts
• Model compound
• Oxide catalysts
• Steam atmosphere