Effects of oxidant acid treatments on carbon-templated hierarchical SAPO-11 materials: Synthesis, characterization and catalytic evaluation in n-decane hydroisomerization

• Published in: Applied catalysis. A, General General, 2014-09, Vol.485, p.230-237
• Main Authors: BERTOLO, Raquel, SILVA, João M, RIBEIRO, Filipa, MALDONADO-HODAR, Francisco J, FERNANDES, Auguste, MARTINS, Angela
• Format: Article
• Language: English
• Subjects: Adsorption; Carbon; Catalysis; Catalysts; Chemistry; Exact sciences and technology; General and physical chemistry; Isomers; Oxidants; Oxidizing agents; Platinum; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
• ISSN: 0926-860X; 1873-3875
• DOI: 10.1016/j.apcata.2014.08.006

Hierarchical SAPO-11 was synthesized using a commercial Merck carbon as template. Oxidant acid treatments were performed on the carbon matrix in order to investigate its influence on the properties of SAPO-11. Structural, textural and acidic properties of the different materials were evaluated by XRD, SEM, N sub(2) adsorption, pyridine adsorption followed by IR spectroscopy and thermal analyses. The catalytic behavior of the materials (with 0.5 wt.% Pt, introduced by mechanic mixture with Pt/Al sub(2)O sub(3)), were studied in the hydroisomerization of n-decane. The hierarchical samples showed higher yields in monobranched isomers than typical microporous SAPO-11, as a direct consequence of the modification on both porosity and acidity, the later one being the most predominant.