Recherche

Afficher tous les résultats pour

Accueil

Personne

Oliver Kröcher

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (77)

Mechanochemistry-assisted hydrolysis of softwood over stable sulfonated carbon catalysts in a semi-batch process

Frédéric Vogel, Oliver Kröcher, David Ferdinand Scholz

The hydrolysis of lignocellulose is the first step in saccharide based bio-refining. The recovery of homogeneous acid catalysts imposes great challenges to the feasibility of conventional hydrolysis processes. Herein, we report a strategy to overcome these ...

2019

Insights into the Nature of the Active Sites of Tin‐Montmorillonite for the Synthesis of Polyoxymethylene Dimethyl Ethers (OME)

Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Alimohammad Bahmanpour

In this study,we reportthat intercalationof tin into montmor-illoniteclay (Sn-MMT)boostscatalyticactivityfor the synthesisof polyoxymethylenedimethylethers,a promisingdieselfueladditive.This increasein activityis attributedto the formationof a hierarchical ...

Wiley-VCH Verlag2019

Cu–Al Spinel as a Highly Active and Stable Catalyst for the Reverse Water Gas Shift Reaction

Ursula Röthlisberger, Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Alimohammad Bahmanpour, Murat Kiliç

The reverse water gas shift reaction is considered to be a highly attractive catalytic route for CO2 recycling in a future sustainable economy. Copperbased catalysts are commonly used for this reaction due to their high activity and selectivity. However, t ...

2019

Prominent role of mesopore surface area and external acid sites for the synthesis of polyoxymethylene dimethyl ethers (OME) on a hierarchical H-ZSM-5 zeolite

Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Alimohammad Bahmanpour

H-ZSM-5 zeolite has been shown to be an active catalyst for the synthesis of polyoxymethylene dimethyl ethers (OME). However, we demonstrated – by passivation of the zeolite's external surface – that the reaction rate is limited due to severe internal diff ...

2019

Effect of SiO2 on co-impregnated V2O5/WO3/TiO2 catalysts for the selective catalytic reduction of NO with NH3

Oliver Kröcher, Adrian Marberger, Davide Ferri

Co-impregnation of vanadia and tungsta on titania produced highly active catalysts for the reduction of nitrogen oxides with ammonia but showed aging tendencies at temperatures around 600 degrees C. In order to preserve their low temperature activity after ...

ELSEVIER SCIENCE BV2019

Selective synthesis of dimethyl ether on eco-friendly K10 montmorillonite clay

Jeremy Luterbacher, Christophe Jean Baranowski, Oliver Kröcher, Florent Emmanuel Héroguel, Alimohammad Bahmanpour

The methanol dehydration reaction was studied over environmentally benign, easily accessible and inexpensive K10 montmorillonite clay used as the catalyst at a temperature range between 200–700 °C. Nearly 100% selectivity towards dimethyl ether (DME) at 80 ...

2018

Impact of Catalyst Geometry on Diffusion and Selective Catalytic Reduction Kinetics under Elevated Pressures

Oliver Kröcher

2018

Numerical Modeling of Hydroperoxyl-Mediated Oxidative Dehydrogenation of Formic Acid under SCR-Relevant Conditions

Oliver Kröcher

2018

Stable complete methane oxidation over palladium based zeolite catalysts

Oliver Kröcher, Davide Ferri

Nature Publishing Group2018

Time-resolved copper speciation during selective catalytic reduction of NO on Cu-SSZ-13

Oliver Kröcher, Adrian Marberger, Davide Ferri

2018

Selective Catalytic Reduction of NOx

Oliver Kröcher

The deactivation pathways of sulfonated carbon catalysts prepared from different carbons were studied during the aqueous‐phase hydrolysis of cellobiose under continuous‐flow conditions. The sulfonation of carbon materials with a low degree of graphitizatio ...

2018

Reversible Segregation of Ni in LaFe0.8Ni0.2O3 +/-delta During Coke Removal

Oliver Kröcher, Davide Ferri, Patrick Simon Steiger

The deactivation of supported nickel catalysts by coking is an important technological subject for many chemical processes, especially when high concentrations of unsaturated hydrocarbons are present in the feed gas. Here, the reversible segregation of Ni ...

Wiley-VCH Verlag2018

Mitigation of Secondary Organic Aerosol Formation from Log Wood Burning Emissions by Catalytic Removal of Aromatic Hydrocarbons

Oliver Kröcher, Davide Ferri

Log wood burning is a significant source of volatile organic compounds including aromatic hydrocarbons (ArHC). ArHC are harmful, are reactive in the ambient atmosphere, and are important secondary organic aerosol (SOA) precursors. Consequently, SOA represe ...

AMER CHEMICAL SOC2018

Deactivation and Regeneration of Sulfonated Carbon Catalysts in Hydrothermal Reaction Environments

Frédéric Vogel, Oliver Kröcher

2018

Catalytic synthesis of polyoxymethylene dimethyl ethers (OME): A review

Christophe Jean Baranowski, Oliver Kröcher, Alimohammad Bahmanpour

Polyoxymethylene dimethyl ethers (OME) containing 3-5 CH2O units (OME3-5) are appealing oxygenated fuels, which can be used in diesel engines with only slight fuel system modifications. Their combustion leads to reduced hazardous exhaust gas emissions comp ...

Elsevier2017

Structural Reversibility and Nickel Particle stability in Lanthanum Iron Nickel Perovskite-Type Catalysts

Andre Heel, Oliver Kröcher, Davide Ferri, Debora Foppiano

Perovskite-type oxides have shown the ability to reversibly segregate precious metals from their structure. This reversible segregation behavior was explored for a commonly used catalyst metal, Ni, to prevent Ni sintering, which is observed on most catalys ...

Wiley-V C H Verlag Gmbh2017

Relationship between structures and activities of supported metal vanadates for the selective catalytic reduction of NO by NH3

Oliver Kröcher, Adrian Marberger, Davide Ferri

Transition and rare earth metal vanadates are potential active phases for the selective catalytic reduction (SCR) of nitric oxide by ammonia for exhaust gas emission control. In this work, various metal vanadates mixed with SiO2-WO3-TiO2 (TWS) were compare ...

Elsevier2017

Page 4 sur 4