Publications by Gaël Peng | EPFL Graph Search

Ruthenium on phosphorous-modified alumina as an effective and stable catalyst for catalytic transfer hydrogenation of furfural

Gaël Peng, Thibault Xavier Florian Fovanna, Oliver Kröcher, Davide Ferri

Supported ruthenium was used in the liquid phase catalytic transfer hydrogenation of furfural. To improve the stability of Ru against leaching, phosphorous was introduced on a Ru/Al2O3 based catalyst upon impregnation with ammonium hypophosphite followed b ...

2020

Aqueous effluent treatment system

Jeremy Luterbacher, Frédéric Edouard Juillard, Gaël Peng, Lionel Bertschy

Aqueous effluent treatment system (2) including a separation reactor (4) having a reactor chamber fluidly connected to an aqueous effluent source (3), connected via a pump (5) to an inlet (34) of the reactor chamber, a fluid extraction system (6) connected ...

2020

Fate and reuse of nitrogen-containing organics from the hydrothermal conversion of algal biomass

Christian Ludwig, Gaël Peng, Mariluz Bagnoud, Frédéric Vogel, Eya Nicodeme

2018

Catalytic Supercritical Water Gasification: Continuous Methanization of Chlorella vulgaris

Christian Ludwig, Gaël Peng, Frédéric Vogel, Dominik Refardt

Continuous catalytic supercritical water gasification (CSCWG; 400 degrees C, 28 MPa) of microalgal biomass (Chlorella vulgaris) was carried out at the microalgae production site of ZHAW in Wadenswil (Switzerland) nonstop over a period of 100 h. Microalgae ...

American Chemical Society2017

Catalytic supercritical water gasification: Interaction of sulfur with ZnO and the ruthenium catalyst

Christian Ludwig, Gaël Peng, Frédéric Vogel

Continuous catalytic supercritical water gasification (CSCWG; 400 degrees C, 28 MPa) of microalgal biomass (Chlorella vulgaris) was carried out at the microalgae production site of ZHAW in Wadenswil (Switzerland) non-stop over a period of 100 h. Characteri ...

Elsevier2017

Ruthenium Dispersion: A Key Parameter for the Stability of Supported Ruthenium Catalysts during Catalytic Supercritical Water Gasification

Christian Ludwig, Gaël Peng, Frédéric Vogel

The catalytic supercritical water gasification of isopropanol (450 degrees C, 30 MPa) over Ru catalysts supported on carbon and metal oxides was performed in a fixed-bed plug flow reactor. The Ru loading was between 1.2 and 2%. The catalyst stability over ...

Wiley-VCH Verlag2016

First developments towards closing the nutrient cycle in a biofuel production process

Christian Ludwig, Gaël Peng, Mariluz Bagnoud, Frédéric Vogel

Hydrothermal liquefaction (HTL) of microalgae is a promising technology offering production of biofuels in a sustainable way. Thanks to the supercritical conditions applied, the recycling of water and nutrients including carbon capture becomes feasible(1-2 ...

Elsevier Science Bv2015

Effect of carbon surface functional groups on the synthesis of Ru/C catalysts for supercritical water gasification

Christian Ludwig, Gaël Peng, Frédéric Vogel

A carbon support was treated with HNO3 to create surface functional groups (e.g. -COOH, -OH), which were then characterized by TGA, TPD, CNS elemental analysis, and Boehm titration. HNO3 modified the carbon surface properties by adding a high amount of car ...

Royal Soc Chemistry2015

Methane Production from Microalgae via Continuous Catalytic Supercritical Water Gasification: Development of Catalysts and Sulfur Removal Techniques

Gaël Peng

This doctoral thesis aims at demonstrating the technical feasibility of methane production from microalgae via continuous catalytic supercritical water gasification (CSCWG). This work focuses on three different research approaches: (i) assessment and impro ...

EPFL2015

Synthesis factors affecting the catalytic performance and stability of Ru/C catalysts for supercritical water gasification

Christian Ludwig, Gaël Peng, Frédéric Vogel

Catalytic supercritical water gasification of isopropanol (450 degrees C, 30 MPa) over Ru/C catalysts was carried out in a fixed-bed plug flow reactor. In the absence of Ru, isopropanol decomposed to solid carbon (coke), and H-2 over the carbon support. Th ...

Royal Society of Chemistry2014

Recovering nutrients from an algal biofuel production process

Christian Ludwig, Gaël Peng, Mariluz Bagnoud, Frédéric Vogel

2012