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Listar por autor "Renz, Michael"

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Carbon-Carbon Bond Formation and Hydrogen Production in the Ketonization of Aldehydes

Orozco Arboleda, Lina Marcela; Renz, Michael; Corma Canós, Avelino (Wiley, 2016-09-08)

Aldehydes possess relatively high chemical energy, which is the driving force for disproportionation reactions such as Cannizzaro and Tishchenko reactions. Generally, this energy is wasted if aldehydes are transformed into ...
Cerium oxide as catalyst for the ketonization of aldehydes: Mechanistic insights and a convenient way to alkanes without consumption of external hydrogen

Orozco-Arboleda, Lina Marcela; Renz, Michael; Corma Canós, Avelino (The Royal Society of Chemistry, 2017)

[EN] The ketonization of aldehydes joins two molecules, with n carbon atoms each, to a ketone with 2n 1 carbon atoms. When employing cerium oxide as catalyst with nano-sized crystals (<15 nm) the ketone can be obtained ...
Cetonización de aldehídos catalizada por óxido de circonio y de cerio: mecanismo de reacción, formación de hidrógeno y una posible aplicación para la transformación de biomasa

Orozco Arboleda, Lina Marcela (Universitat Politècnica de València, 2017-07-31)

This thesis comprises a detailed work on the ketonization of aldehydes. The ketonization reaction joins two aldehyde molecules, with n carbon atoms each, to a ketone with 2n ¿ 1 carbon atoms. The reaction is involved, ...
Conversion of levulinic acid derived valeric acid into a liquid transportation fuel of the kerosene type

Corma Canós, Avelino; Oliver-Tomás, Borja; Renz ., Michael; Simakova, Irina (Elsevier, 2014)

[EN] In the transformation of lignocellulosic biomass into fuels and chemicals carbon-carbon bond formations and rising hydrophobicity are highly desired. The ketonic decarboxylation fits these requirements perfectly as ...
Conversión de biomasa a productos químicos de interés y keroseno mediante descarboxilación cetónica e hidrodesoxigenación

Oliver Tomás, Borja (Universitat Politècnica de València, 2013-06-24)

[ES] Transformación de ácidos carboxílicos procedentes de la biomasa en productos químicos y keroseno. Se estudió la descarboxilación cetónica del ácido decanoico sobre diversos óxidos metálicos y de diferentes ácidos ...
Direct conversion of carboxylic acids (C-n) to alkenes (C2n-1) over titanium oxide in absence of noble metals

Oliver-Tomás, Borja; Renz, Michael; Corma Canós, Avelino (Elsevier, 2016-05-01)

Carbon-carbon bond formations and deoxygenation reactions are important for biomass up-grading. The classical ketonic decarboxylation of carboxylic acids provides symmetrical ketones with 2n+1 carbon atoms and eliminates ...
Effect of Gas Atmosphere on Catalytic Behaviour of Zirconia, Ceria and Ceria Zirconia Catalysts in Valeric Acid Ketonization

Zaytseva, Yu. A.; Panchenko, V. N.; Simonov, M. N.; Shutilov, A. A.; Zenkovets, G. A.; Renz, Michael; Simakova, I. L.; Parmon, V. N. (Springer Verlag (Germany), 2013-06)

[EN] Ketonization of valeric acid, which can be obtained by lignocellulosic biomass conversion, was carried out in a fixed bed flow reactor over ZrO2, 5-20 % CeO2/ZrO2 and CeO2 both under hydrogen and nitrogen stream at ...
Effect of the C-alpha substitution on the ketonic decarboxylation of carboxylic acids over m-ZrO2: the role of entropy

Oliver-Tomás, Borja; Gonell-Gómez, Francisco; Pulido, Angeles; Renz, Michael; Boronat Zaragoza, Mercedes (Royal Society of Chemistry, 2016)

[EN] The kinetics of the ketonic decarboxylation of linear and branched carboxylic acids over m-ZrO2 as a catalyst has been investigated. The same apparent activation energy is experimentally determined for the ketonic ...
El proceso de carbonización hidrotermal aplicado a la fracción orgánica de los residuos sólidos urbanos

Ponce Ballester, Estefanía (Universitat Politècnica de València, 2013-06-26)

[ES] Se estudia biomasa típica de la fracción orgánica de los residuos sólidos urbanos en el proceso HTC y se caracteriza el carbón obtenido por análisis elemental, se determina el contenido de cenizas y volátiles y se ...
Environmental Performance of Hydrothermal Carbonization of Four Wet Biomass Waste Streams at Industry-Relevant Scales

Owsianiak, Mikolaj; Ryberg, Morten W.; Renz, Michael; Hitzl, Martin; Hauschildt, Michael Z. (American Chemical Society, 2016-12)

[EN] Hydrothermal carbonization (HTC) of green waste, food waste, organic fraction of municipal solid waste (MSW), and digestate is assessed using life cycle assessment as a potential technology to treat biowaste. Water ...
Evaluating climate change mitigation potential of hydrochars: compounding insights from three different indicators

Owsianiak, Mikolaj; Brooks, Jennifer; Renz, Michael; Laurent, Alexis (Wiley-Blackwell Publishing Ltd., 2018)

[EN] We employed life cycle assessment to evaluate the use of hydrochars, prospective soil conditioners produced from biowaste using hydrothermal carbonization, as an approach to improving agriculture while using carbon ...
Evaluation of hydrothermal carbonization in urban mining for the recovery of phosphorus from the organic fraction of municipal solid waste

Oliver-Tomás, Borja; Hitzl, Martin; Owsianiak, Mikolaj; Renz, Michael (Elsevier, 2019-08)

[EN] The organic fraction of municipal solid waste was identified as an alternative phosphorus resource: hydrothermal carbonization provided phosphorus-rich hydrochar. Two alternative valorization pathways can be considered ...
From MOFs to zeolites: zirconium for epoxide rearrangement

Corma Canós, Avelino; Orozco Arboleda, Lina Marcela; Renz, Michael (Royal Society of Chemistry, 2013)

[EN] Zirconium Lewis acid sites grafted onto a mesoporous silicate (MCM-41) and zirconium sites incorporated into inorganic-organic MOF materials are employed successfully in the rearrangement of beta-pinene epoxide into ...
Fuel and chemicals from wet lignocellulosic biomass waste streams by hydrothermal carbonization

Burguete Llorens, Pedro Luis; Corma Canós, Avelino; Hitzl, Martin; Modrego Latorre, Ruben; Ponce Ballester, Estefanía; Renz, Michael (Royal Society of Chemistry, 2016)

[EN] Most valorization processes for biomass waste require dry raw material or at least a relatively low amount of residual humidity. In contrast, hydrothermal carbonization (HTC) is a valorization process for lignocellulosic ...
High Quality Biowaxes from Fatty Acids and Fatty Esters: Catalyst and Reaction Mechanism for Accompanying Reactions

Oliver-Tomás, Borja; Renz, Michael; Corma Canós, Avelino (American Chemical Society, 2017-11-15)

[EN] Biowaxes are interesting materials for pharmaceutical industry and consumer goods. Here the production of waxes from alternative renewable resources has been evaluated on the basis of the ketonic decarboxylation of ...
High-Quality Diesel from Hexose- and Pentose-Derived Biomass Platform Molecules

Corma Canós, Avelino; De la Torre Alfaro, Olalla; Renz, Michael (Wiley-VCH Verlag, 2011-11-18)

Blending in: Lignocellulosic biomass contains hexoses and pentoses, and both of them may be utilized in second-generation biocarburants. A process that uses platform molecules derived from hexoses (5-methylfurfural) and ...
Ketone Formation from Carboxylic Acids by Ketonic Decarboxylation: The Exceptional Case of the Tertiary Carboxylic Acids

Oliver-Tomás, Borja; Renz, Michael; Corma Canós, Avelino (John Wiley & Sons, 2017-09-18)

[EN] For the reaction mechanism of the ketonic decarboxylation of two carboxylic acids, a -keto acid is favored as key intermediate in many experimental and theoretical studies. Hydrogen atoms in the -position are an ...
Ketonic decarboxylation reaction mechanism: A combined experimental and DFT study

Pulido Junquera, Maria Angeles; Oliver Tomás, Borja; Renz, Michael; Boronat Zaragoza, Mercedes; Corma Canós, Avelino (Wiley-VCH Verlag, 2013)

The ketonic decarboxylation of carboxylic acids has been carried out experimentally and studied theoretically by DFT calculations. In the experiments, monoclinic zirconia was identified as a good catalyst, giving high ...
Methyl ketones from carboxylic acids as valuable target molecules in the biorefinery

Marie, Olivier; Ignatchenko, Alexey, V.; Renz, Michael (Elsevier, 2021-05-01)

[EN] For the preparation of methyl ketones, cross Ketonic Decarboxylation, i.e., the formation of a ketone from two different carboxylic acids, and the reketonization, i.e., the transformation of a carboxylic acid into a ...
Optimización del tratamiento térmico de hydrochar para producir ánodos de baterías de sodio

Garzón Martín, Fernando (Universitat Politècnica de València, 2023-10-31)

[ES] La Unión Europea apuesta por las energías renovables para la mitigación del cambio climático. Estás no están siempre disponibles y por ello se requieren métodos que permitan el almacenamiento de energía. Para ello se ...