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Inhibition of Xylene Isomerization in the Production of Renewable Aromatic Chemicals from Biomass-Derived Furans

Journal Article · · ACS Catalysis
 [1];  [2];  [3];  [4];  [3];  [3];  [3];  [3];  [4];  [3];  [5]
  1. Univ. of Massachusetts, Amherst, MA (United States); University of Minnesota
  2. Univ. of Minnesota, Minneapolis, MN (United States)
  3. Univ. of Delaware, Newark, DE (United States)
  4. Univ. of Massachusetts, Amherst, MA (United States)
  5. Univ. of Massachusetts, Amherst, MA (United States); Univ. of Minnesota, Minneapolis, MN (United States)

Here, inhibition of p-xylene isomerization in the presence of H-Y (Si/Al 2.6) and H-BEA (Si/Al 12.5) zeolites was studied under conditions relevant to p-xylene production from 2,5-dimethylfuran (DMF) and ethylene. Through examination of the reaction components, it was shown that both DMF and 2,5-hexanedione inhibit transalkylation and methyl shift reactions of p-xylene, while other reaction components, water and ethylene, do not. Retention of Brønsted acid sites after the reaction was shown through the use of 27Al NMR for both H-Y and H-BEA zeolites, but with a reduction in the ratio of tetrahedrally coordinated aluminum (strong acid sites) to octahedrally coordinated aluminum (Lewis acid sites) coinciding with the disappearance of the framework aluminum. Diffuse reflectance spectroscopy has shown preferential adsorption of DMF and 2,5-hexanedione (DMF + H2O) relative to p-xylene to the Brønsted acid sites located in the super and sodalite cages of the H-Y. Desorption characteristics for DMF and p-xylene in H-Y and H-BEA were determined by thermogravimetric analysis, consistent with adsorption energetics of individual chemical species and dimeric complexes evaluated by an ONIOM method. Evaluation of three mechanisms, allowing for production of p-xylene from DMF and ethylene while also inhibiting p-xylene isomerization, supports high surface coverage of the active site with 2,5-hexanedione, supported by electronic structure calculations.

Research Organization:
Univ. of Minnesota, Minneapolis, MN (United States); Energy Frontier Research Centers (EFRC) (United States). Catalysis Center for Energy Innovation; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0001004; AC02-05CH11231
OSTI ID:
1865830
Alternate ID(s):
OSTI ID: 1387604
Journal Information:
ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 3 Vol. 6; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Selective Production of Renewable para -Xylene by Tungsten Carbide Catalyzed Atom-Economic Cascade Reactions journal January 2018
Methyl Perillate as a Highly Functionalized Natural Starting Material for Terephthalic Acid journal February 2018
Aluminum‐Based Catalysts for Cycloaddition Reactions: Moving One Step Ahead in Sustainability journal September 2019
Inert competitive adsorption for the inhibition of oligomerization of alkenes during alcohol dehydration journal January 2018
Efficient conversion of 5-hydroxymethylfurfural to high-value chemicals by chemo- and bio-catalysis journal January 2018
Identifying the roles of acid–base sites in formation pathways of tolualdehydes from acetaldehyde over MgO-based catalysts journal January 2020
Ultrafast flow chemistry for the acid-catalyzed conversion of fructose journal January 2019

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