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Controlling reaction pathways via selective C-O activation for highly efficient biomass oriented-upgrading.
- Source :
-
Chemical Engineering Journal . Oct2022:Part 4, Vol. 446, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- • Highly dispersed and stable Cu nanoparticles was finely encapsulated in HZSM-5. • Selectivity of valeric biofuel from GVL upgrading was preciously controlled. • Synergetic effect of confined Cu centers and acidic zeolite was crucial for the catalytic performance. • C-O bond activation mode was determined by distinct electrons redistributions on GVL in different adsorbed environments. Achieving precise selectivity control by driving specific reaction paths involving selective C-O bond activation of multifunctional molecules in renewable biomass oriented-upgrading is highly attractive but challenging. Herein, a facile in-situ hydrothermal strategy was developed to obtain highly dispersed and stable Cu nanoparticles encapsulated in well-organized HZSM-5 zeolite, which exhibited extraordinary selectivity control in the lignocellulosic biomass-derived γ-valerolactone (GVL) upgrading toward valuable valeric biofuels with good stability. The as-synthesized Cu@HZSM-5 exhibited a framework Al-dependent Cu distribution characteristic in HZSM-5, while the Cu spatial confinement by zeolite framework together with the synergetic effect of confined Cu centers and acidic zeolite support endowed the optimized Cu@HZSM-5 catalysts exceedingly high hydro-conversion efficiency. Theoretical calculations demonstrated that the transferred electrons from Cu to GVL in different zeolite microenvironments (zeolite-encapsulated and -impregnated structure) showed the very distinct redistributions on the C atoms of GVL, which was crucial to tune the ring C-O bond activation mode in GVL ring-opening, consequently giving a well-controlled product selectivity. [ABSTRACT FROM AUTHOR]
- Subjects :
- *BIOMASS
*ZEOLITES
*LIGNOCELLULOSE
*BIOMASS energy
*ELECTRONS
*ATOMS
Subjects
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 446
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 157522236
- Full Text :
- https://doi.org/10.1016/j.cej.2022.137404