Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Activity and stability of mesoporous CeO2 and ZrO2 catalysts for the self-condensation of cyclopentanone

Journal Article · · Applied Catalysis B: Environmental
 [1];  [2];  [2];  [3]
  1. Univ. of Oklahoma, Norman, OK (United States); University of Oklahoma Norman OK (United States)
  2. Univ. of Connecticut, Storrs, CT (United States)
  3. Univ. of Oklahoma, Norman, OK (United States)

Metal oxides containing acid-base pairs are widely used as catalysts for aldol condensation reactions, but they are often prone to secondary condensation and fast deactivation. In this contribution, high-surface area mesoporous CeO2 and ZrO2 have been synthesized and tested as catalysts for the self-condensation of cyclopentanone, an attractive molecular building block for several biomass upgrading strategies. Here, the catalytic activity, stability, and overall kinetics behavior of these two catalysts have been compared in the liquid phase. A detailed kinetics analysis shows that on both oxides, the reaction is controlled by the initial unimolecular α-H abstraction step, in which cyclopentanone forms the crucial enolate intermediate. Subsequently, the enolate couples with another cyclopentanone molecule in a bimolecular C-C coupling step. CO2-TPD analysis and site titration with probe molecules indicate that initially the most active catalyst is the mesoporous ZrO2 sample with strong base character. However, this catalyst exhibits a very rapid deactivation. By contrast, the mesoporous CeO2 prepared in this study has lower basicity strength, which results in lower initial activity, but enhanced stability.

Research Organization:
Univ. of Oklahoma, Norman, OK (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
Grant/Contract Number:
SC0018284
OSTI ID:
1824912
Alternate ID(s):
OSTI ID: 1778296
Journal Information:
Applied Catalysis B: Environmental, Journal Name: Applied Catalysis B: Environmental Vol. 267; ISSN 0926-3373
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (36)

Aldol Condensations Catalyzed by Basic Anion-Exchange Resins journal November 2016
Cyclopentanone as an Alternative Linking Reactant for Heterogeneously Catalyzed Furfural Aldol Condensation journal April 2017
Vapor phase reactions of acetaldehyde over type X zeolites journal January 2000
The aldol condensation of lower aldehydes over MFI zeolites with different acidic properties journal May 2001
Acetone condensation and selective hydrogenation to MIBK on Pd and Pt hydrotalcite-derived MgAl mixed oxide catalysts journal November 2005
Stability, reutilization, and scalability of activated hydrotalcites in aldol condensation journal June 2008
Reconstructed Mg-Al hydrotalcites prepared by using different rehydration and drying time: Physico-chemical properties and catalytic performance in aldol condensation journal April 2017
Evaluating strategies for catalytic upgrading of pyrolysis oil in liquid phase journal February 2014
Improving stability of cyclopentanone aldol condensation MgO-based catalysts by surface hydrophobization with organosilanes journal December 2018
Selective transformation of furfural to cyclopentanone journal July 2012
Controllable self-aldol condensation of cyclopentanone over MgO-ZrO2 mixed oxides: Origin of activity & selectivity journal June 2016
Aldol condensation of furfural and acetone over MgAl layered double hydroxides and mixed oxides journal March 2014
Aldol condensation of furfural and acetone on zeolites journal May 2014
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
Condensation and esterification reactions of alkanals, alkanones, and alkanols on TiO2: Elementary steps, site requirements, and synergistic effects of bifunctional strategies journal August 2016
Aldol condensation of aldehydes over semicrystalline zeolitic-mesoporous UL-ZSM-5 journal September 2005
Quantifying environmental performance of biomass energy journal June 2016
Effects of Composition and Structure of Mg/Al Oxides on Their Activity and Selectivity for the Condensation of Methyl Ketones journal September 2016
Surface Properties of Hydrotalcite-Based Zn(Mg)Al Oxides and Their Catalytic Activity in Aldol Condensation of Furfural with Acetone journal April 2017
Spectroscopic Investigation of Surface-Dependent Acid–Base Property of Ceria Nanoshapes journal March 2015
Substituent Effects and Molecular Descriptors of Reactivity in Condensation and Esterification Reactions of Oxygenates on Acid–Base Pairs at TiO 2 and ZrO 2 Surfaces journal September 2016
Kinetic and Mechanistic Examination of Acid–Base Bifunctional Aminosilica Catalysts in Aldol and Nitroaldol Condensations journal December 2015
Aldol Condensation of Cyclopentanone on Hydrophobized MgO. Promotional Role of Water and Changes in the Rate-Limiting Step upon Organosilane Functionalization journal February 2019
Rhodium-Catalyzed C−C Bond Formation via Heteroatom-Directed C−H Bond Activation journal February 2010
Experimental and Theoretical Study of n -Butanal Self-Condensation over Ti Species Supported on Silica journal July 2014
Periodic DFT Study of the Tetragonal ZrO 2 Nanocrystals: Equilibrium Morphology Modeling and Atomistic Surface Hydration Thermodynamics journal August 2012
Surface Reactions of Acetone on Al 2 O 3 , TiO 2 , ZrO 2 , and CeO 2 :  IR Spectroscopic Assessment of Impacts of the Surface Acid−Base Properties journal February 2001
A general approach to crystalline and monomodal pore size mesoporous materials journal December 2013
Distributed processes for biomass conversion could aid UN Sustainable Development Goals journal October 2018
The role of synergic interaction in transition state formation for the aldol reaction on a metal oxide catalyst: a DFT investigation journal January 2015
Efficient C–C coupling of bio-based furanics and carbonyl compounds to liquid hydrocarbon precursors over lignosulfonate derived acidic carbocatalysts journal January 2018
Multistage torrefaction and in situ catalytic upgrading to hydrocarbon biofuels: analysis of life cycle energy use and greenhouse gas emissions journal January 2017
Waste elimination in condensation reactions of industrial importance journal July 2002
Catalytic conversion of biomass to biofuels journal January 2010
Synthesis of renewable high-density fuels using cyclopentanone derived from lignocellulose journal January 2014