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Ball Milling Modified SAPO‐11 Based Catalysts for n ‐Decane Hydroisomerization
Author(s) -
Ferreira Luisa,
Ribeiro Filipa,
Fernandes Auguste,
Martins Angela
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901457
Subject(s) - catalysis , microporous material , bifunctional , materials science , decane , ball mill , chemical engineering , selectivity , porosimetry , adsorption , porosity , chemistry , organic chemistry , composite material , porous medium , engineering
Bifunctional Pt/SAPO‐11 catalysts were prepared using as acid matrix the microporous silico‐aluminophosphate, SAPO‐11, synthesized under microwave radiation. After synthesis, the material was physically modified using a ball mill, changing the grinding time but keeping frequency constant. The metal function (0.5 wt.% Pt) was introduced through mechanical mixture with commercial Pt loaded alumina. The catalysts were characterized by several techniques: powder X‐Ray Diffraction, pyridine adsorption followed by infrared spectroscopy, low temperature N 2 adsorption, Hg intrusion porosimetry and electronic microscopy (SEM). The characterization data show modifications of structural and textural properties of the samples as the milling time increases. The catalytic behaviour of Pt/SAPO‐11 materials was studied for hydroisomerization of long chain n ‐alkanes, using n ‐decane as model molecule, aiming to increase the production of mono‐branched isomers. The catalytic results show that, under optimized milling conditions (60 min; 50 Hz) the selectivity into mono‐branched isomers increased when compared with parent catalyst.