TY - JOUR
T1 - Hierarchically porous FER zeolite obtained via FAU transformation for fatty acid isomerization’
AU - Bolshakov, Aleksei
AU - van de Poll, Rim
AU - van Bergen-Brenkman, T. (Tanja)
AU - Wiedeman, S.C.C.
AU - Kosinov, Nikolay
AU - Hensen, Emiel
PY - 2020/4/1
Y1 - 2020/4/1
N2 - Skeletal isomerization of linear unsaturated fatty acids is important in the production of branched-chain saturated fatty acids with diverse applications. This reaction can be efficiently catalyzed by ferrierite (FER) zeolite. The reaction, however, suffers from diffusion limitations in the 10-membered ring channels. Herein, we report a method for the synthesis of hierarchically porous FER zeolite via transformation of FAU precursor driven by N-methylpyrrolidine (NMP) and amphiphile 1,2-dimethyl-3-hexadecyl-1H-imidazol-3-ium bromide (C16dMImz) as the structure-directing agent (SDA) and a mesoporogen, respectively, under hydrothermal conditions. This dual-template approach allows tuning the morphological and textural properties of the mesoporous FER materials by varying the concentration of the mesoporogen in the initial gel. The optimized FER sample is characterized by a high mesoporous volume (0.19 cm3 g-1), large external surface area (∼120 m2 g-1) and reduced crystal size in the a- and c-dimensions. This implies shortened diffusional pathways in the 10-membered ring channels. These modifications led to a significantly enhanced catalytic performance of hierarchical FER zeolite in the isomerization of fatty acids in comparison with a bulk FER reference zeolite.
AB - Skeletal isomerization of linear unsaturated fatty acids is important in the production of branched-chain saturated fatty acids with diverse applications. This reaction can be efficiently catalyzed by ferrierite (FER) zeolite. The reaction, however, suffers from diffusion limitations in the 10-membered ring channels. Herein, we report a method for the synthesis of hierarchically porous FER zeolite via transformation of FAU precursor driven by N-methylpyrrolidine (NMP) and amphiphile 1,2-dimethyl-3-hexadecyl-1H-imidazol-3-ium bromide (C16dMImz) as the structure-directing agent (SDA) and a mesoporogen, respectively, under hydrothermal conditions. This dual-template approach allows tuning the morphological and textural properties of the mesoporous FER materials by varying the concentration of the mesoporogen in the initial gel. The optimized FER sample is characterized by a high mesoporous volume (0.19 cm3 g-1), large external surface area (∼120 m2 g-1) and reduced crystal size in the a- and c-dimensions. This implies shortened diffusional pathways in the 10-membered ring channels. These modifications led to a significantly enhanced catalytic performance of hierarchical FER zeolite in the isomerization of fatty acids in comparison with a bulk FER reference zeolite.
KW - Dual-template
KW - FAU transformation
KW - Fatty acid isomerization
KW - Ferrierite
KW - Hierarchical zeolite
UR - http://www.scopus.com/inward/record.url?scp=85075899637&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2019.118356
DO - 10.1016/j.apcatb.2019.118356
M3 - Article
SN - 0926-3373
VL - 263
JO - Applied Catalysis. B, Environmental
JF - Applied Catalysis. B, Environmental
M1 - 118356
ER -