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Role of water in cyclopentanone self-condensation reaction catalyzed by MCM-41 functionalized with sulfonic acid groups

Journal Article · · Journal of Catalysis
 [1];  [2];  [3];  [2]
  1. Univ. of Oklahoma, Norman, OK (United States); University of Oklahoma Norman OK (United States)
  2. Univ. of Oklahoma, Norman, OK (United States)
  3. Florida State Univ., Tallahassee, FL (United States)

Water is ubiquitous in many catalytic reactions used in the upgrading of biomass. Therefore, quantifying and controlling the influence of water in activity, selectivity, and catalyst deactivation is essential for advancing this technology. In this work, we report a kinetic study of the cyclopentanone self-condensation over functionalized MCM-41 catalysts with varying acid densities and in the presence of controlled amounts of water. It is observed that small amounts of water enhance the activity of these catalysts. A detailed analysis of the experimental data indicates that the rate limiting step is the enol formed via protonation and tautomerization of a cyclopentanone molecule attacks the electrophilic carbon of a second carbonyl. On catalyst with high density of sulfonic acid groups, the best fitting of the experimental data is obtained with a kinetic model in which the Csingle bondC bond forming step mostly occurs with the second carbonyl molecule adsorbed (and polarized) by an adjacent acid site (Langmuir-Hinshelwood, L-H). By contrast, at a lower density of sulfonic acid groups, the number of active sites with enough proximity greatly decreases and the Csingle bondC bond forming occurs with the second carbonyl in the liquid phase (Eley-Rideal, E-R). In this case, it is observed that when water is added to the reaction mixture, the best description of the kinetics switches from E-R to L-H. Evidently, the water can help bridging active sites remotely located on the surface, extending the polarizing effect of the second acid site.

Research Organization:
Univ. of Oklahoma, Norman, OK (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0018284
OSTI ID:
1824939
Alternate ID(s):
OSTI ID: 1546810
Journal Information:
Journal of Catalysis, Journal Name: Journal of Catalysis Vol. 377; ISSN 0021-9517
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (38)

Solid Acids as Heterogeneous Support for Primary Amino Acid-Derived Diamines in Direct Asymmetric Aldol Reactions journal March 2011
Induced Chirality in a Metal-Organic Framework by Postsynthetic Modification for Highly Selective Asymmetric Aldol Reactions journal July 2014
One-Step MIBK Synthesis: A New Process from 2-Propanol journal May 2002
The aldol condensation of lower aldehydes over MFI zeolites with different acidic properties journal May 2001
Reconstructed Mg-Al hydrotalcites prepared by using different rehydration and drying time: Physico-chemical properties and catalytic performance in aldol condensation journal April 2017
Improving stability of cyclopentanone aldol condensation MgO-based catalysts by surface hydrophobization with organosilanes journal December 2018
Enhanced cooperative, catalytic behavior of organic functional groups by immobilization journal April 2006
The effect of acid–base pairing on catalysis: An efficient acid–base functionalized catalyst for aldol condensation journal April 2007
Deoxygenation of methylesters over CsNaX journal August 2008
Vapour-phase C–C coupling reactions of biomass-derived oxygenates over Pd/CeZrOx catalysts journal September 2009
Vapor phase butanal self-condensation over unsupported and supported alkaline earth metal oxides journal February 2012
Substrate inhibition in the heterogeneous catalyzed aldol condensation: A mechanistic study of supported organocatalysts journal July 2012
Preparation of highly superacidic sulfated zirconia via combustion synthesis and its application in Pechmann condensation of resorcinol with ethyl acetoacetate journal August 2012
Tuning acid–base cooperativity to create next generation silica-supported organocatalysts journal December 2013
Elementary steps in acetone condensation reactions catalyzed by aluminosilicates with diverse void structures journal February 2017
Isothermal (vapour+liquid) equilibria for the binary (cyclopentanone or cyclohexanone with 1,1,2,2-tetrachloroethane) systems at temperatures of (343.15, 353.15, and 363.15)K journal November 2006
The effect of the distance between acidic site and basic site immobilized on mesoporous solid on the activity in catalyzing aldol condensation journal February 2011
Synthesis of sulphonated mesoporous phenolic resins and their application in esterification and asymmetric aldol reactions journal February 2013
High-Temperature Grafting Silylation for Minimizing Leaching of Acid Functionality from Hydrophobic Mesoporous Silicas Used as Catalysts in the Liquid Phase journal April 2019
Kinetic and Mechanistic Examination of Acid–Base Bifunctional Aminosilica Catalysts in Aldol and Nitroaldol Condensations journal December 2015
Aldol Condensation of Acetaldehyde over Titania, Hydroxyapatite, and Magnesia journal April 2016
TiO 2 -Catalyzed n -Valeraldehyde Self-Condensation Reaction Mechanism and Kinetics journal June 2017
Aldol Condensation of Cyclopentanone on Hydrophobized MgO. Promotional Role of Water and Changes in the Rate-Limiting Step upon Organosilane Functionalization journal February 2019
Ru-, Rh-, and Pd-Catalyzed C−C Bond Formation Involving C−H Activation and Addition on Unsaturated Substrates:  Reactions and Mechanistic Aspects journal May 2002
Synthesis of Transportation Fuels from Biomass: Chemistry, Catalysts, and Engineering journal September 2006
Rhodium-Catalyzed C−C Bond Formation via Heteroatom-Directed C−H Bond Activation journal February 2010
Organized Surface Functional Groups:  Cooperative Catalysis via Thiol/Sulfonic Acid Pairing journal November 2007
Hydrophobic Zeolites for Biofuel Upgrading Reactions at the Liquid–Liquid Interface in Water/Oil Emulsions journal May 2012
Metal–Organic Frameworks as Catalysts for Organic Synthesis: A Critical Perspective journal April 2019
Solvent-mediated charge separation drives alternative hydrogenation path of furanics in liquid water journal April 2019
Amorphous SiO 2 surface models: energetics of the dehydroxylation process, strain, ab initio atomistic thermodynamics and IR spectroscopic signatures journal January 2016
Waste elimination in condensation reactions of industrial importance journal July 2002
Cooperative catalysis by silica-supported organic functional groups journal January 2008
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu journal April 2010
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Generalized Gradient Approximation Made Simple journal October 1996