Chemical and Environmental Engineering Group

Beatriz Paredes (05/16/1980) studied Chemical Engineering in Rey Juan Carlos University (2003, Hons.). She developed her Ph.D. in the Chemical and Environmental Engineering Group, Rey Juan Carlos University, granted by the Spanish Government (2004-2008). After that, she has been Postdoctoral Researcher and, since January 2009, Assistant Professor. She carried out a short stay during her Ph.D. (3 months) in the Institute for Polymer Research of the University of Waterloo (Ontario, Canada) under the supervision of Prof. Joao B.P. Soares; and a postdoctoral stay (6 months) in the “Laboratoire de Chimie et Procédés de Polymérisation, Centre Nationale de la Recherche Scientifique” (Lyon, France) under the supervision of Dr. Christophe Boisson and Dr. Franck D’Agosto. Her main research interests are focused on the synthesis and characterization of supports and supported polymerization catalysts, and its use in olefin polymerization in slurry processes, with a fundamental polyolefin characterization.

  • Hybrid MOF catalysts development for glycerol valorization

    Funding : Universidad Rey Juan Carlos ()
    Start / End Years : 2023 - 2023
    Principal Investigator : Orcajo Rincón, Gisela
    Research Team : - Calleja Pardo, Guillermo - García Rojas, Elena - Leo Llorente, Pedro - Martos Sánchez, Carmen - Orcajo Rincón, Gisela - Paredes Martínez, Beatriz - Tapiador Cebrián, Jesús 

      Show summary: In the current energy-demanding world and emissions-restrictive scenario, biofuels also play an important role in decarbonization, mainly in transportation, buildings and industry. The global production of biodiesel is still growing, generating a massive amount of glycerol as by-product at a rate of 10-12% of biodiesel and a purity of about 50-55%. The global glycerol market size was valued at USD 2.4 billion in 2020 and is expected to expand at a compound annual growth rate (CAGR) of 6.4% in terms of revenue from 2021 to 2027. Alternatives are especially interesting if the use of crude glycerol is enabled without the need of further purification, so new chemical conversion routes need to be explored. Among these alternatives, acetalization reactions stand out as a process that can adhere to the principles of Green Chemistry and can be catalyzed by a heterogeneous catalyst. Acetals are traditionally produced from aldehydes and alcohols in the presence of typical acid catalysts such as dry HCl, H2SO4, trifluoroacetic acid, and p-toluenesulfonic acid. Recently, successful, and efficient acetalization reactions have also been reported using heterogeneous catalysts such as Amberlyst-15 and Amberlyst-36, silica-supported heteropoly acids, mesoporous silicates containing arylsulfonate groups and zeolites. However, none of these catalysts can simultaneously contain structural Lewis and Brønsted acid sites, which is a suitable catalytic feature for acetalization reactions. The main objective of this project is to find an efficient system to transform glycerol into high-value products by using advanced catalysts that improves the state of the art about acetalization of glycerol, using heterogeneous, active and selective novel catalysts. These advanced catalysts will be hybrid materials based on MOFs and mesoporous silica that would enhance the physical and chemical properties of the MOF phase, decreasing the economic costs of the catalyst production.

Evaluation of bimodal polyethylene from chromium oxide/metallocene hybrid catalysts for high resistance applications

Paredes, B.; Moreno, J.; Carrero, A.; van Grieken, R.

Strain hardening test on the limits of Slow Crack Growth evaluation in high resistance polyethylene resins: Effect of comonomer type

Domínguez, C.; Robledo, N.; Paredes, B.; García-Muñoz, R. A.

Influence of sterospecificity and molecular weight on mechanical properties of iso-syndio-polypropylene obtained by combination of metallocene catalysts

Lopez-Moya, E.; van Grieken, R.; Carrero, A.; Paredes, B.

Production of bimodal polyethylene on chromium oxide/metallocene binary catalyst: Evaluation of comonomer effects

Moreno, J.; Paredes, B.; Carrero, A.; Vélez, D.

Bimodal polypropylene through binary metallocene catalytic systems: comparison between hybrid and mixed heterogeneous catalysts

Paredes, B.; van Grieken, R.; Carrero, A.; Lopez-Moya, E.

Synthesis and characterization of low molecular weight ethylene–propylene copolymers prepared using metallocene catalysts

Tourkmani, K.; Casas, E.; Paredes, B.; Moreno, J.; Perez, P.; Escola, J. M.; van Grieken, R.

Ethylene polymerization over Ph2C(Cp)(2,7-t-Bu2Flu)ZrCl2 supported on SiO2-MAO

Casas, E.; Paredes, B.; Escola, J. M.; Martín, C.; van Grieken, R.

(nBuCp)2ZrCl2 supported over mesoporous propyl sulfonic silica-alumina a highly active heterogeneous catalyst for ethylene polymerization

Casas, E.; Paredes, B.; van Grieken, R.; Escola, J. M.

Bimodal poly(propylene) trough binary metallocene catalytic systems as an alternative to melt blending

López-Moya, E.; Van Grieken, R.; Carrero, A.; Paredes, B.

Chromium oxide/metallocene binary catalysts for bimodal polyethylene: Hydrogen effects

Paredes, B.; van Grieken, R.; Carrero, A.; Moreno, J.; Moral, A.

Development of a new synthetic method based on in situ strategies for polyethylene/clay composites

Carrero, A.; van Grieken, R.; Suarez, I.; Paredes, B.

Hybrid zeolitic-mesostructured materials as supports of metallocene polymerization catalysts

Carrero, A.; van Grieken, R.; Paredes, B.

Ethylene/1-Hexene copolymers produced with MAO/(nBuCp)2ZrCl2) supported on SBA-15 materials with different pore sizes

Paredes, B.; van Grieken, R.; Carrero, A.; Suarez, I.; Soares, J. B. P.

Ethylene polymerization by metallocene catalysts supported over siliceous materials with bimodal pore size distribution

Moreno, J.; van Grieken, R.; Carrero, A.; Paredes, B.

Development of novel chromium oxide/metallocene hybrid catalysts for bimodal polyethylene

Moreno, J.; van Grieken, R.; Carrero, A.; Paredes, B.

Ethylene polymerization with methylaluminoxane/(nBuCp)2ZrCl2 catalyst supported on silica and silica-alumina at different AlMAO/Zr molar ratios

van Grieken, R.; Carrero, A.; Paredes, B.

Study of the “in-situ blended” method for polyethylene/clay preparation: effect of clay pretreatment

van Grieken, R.; Carrero, A.; Suarez, I.; Paredes, B.

  • Journal of Nanostructured Polymers and Nanocomposites, 6(3), 79-86 (2010)

Ethylene polymerization over (nBuCp)2ZrCl2/MAO catalyst system supported on aluminosilicate SBA-15 mesostructured materials.

Carrero, A.; van Grieken, R.; Suarez, I.; Paredes, B.

Ethylene polymerization over supported MAO/(nBuCp)2ZrCl2 catalysts: Influence of support properties

van Grieken, R.; Carrero, A.; Suarez, I.; Paredes, B.

Characterization of ethylene-1-hexene copolymers made with supported metallocene catalysts: Influence of support type

Paredes, B.; Soares, J. B. P.; van Grieken, R.; Carrero, A.; Suarez, I.

Effect of 1-hexene comonomer on polyethylene particle growth and kinetic profiles

van Grieken, R.; Carrero, A.; Suarez, I.; Paredes, B.

Sol-gel synthesis of mesostructured gamma alumina templated by cationic surfactants

Aguado, J.; Escola, J. M.; Castro, M. C.; Paredes, B.

Metathesis of 1-hexene over Rhenium oxide supported on ordered mesoporous aluminas: comparison with Re2O7 gamma alumina

Aguado, J.; Escola, J. M.; Castro, M. C.; Paredes, B.