Publications by Jan Van Herle | EPFL Graph Search

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Thermochemical biomass-to-fuel conversion requires an increased hydrogen concentration in the syngas derived from gasification, which is currently achieved by water–gas-shift reaction and CO2 removal. State-of-the-art biomass-to-fuels convert less than hal ...

The electrical conductivity of Ce0.992Nb0.008O2−δ was measured as a function of oxygen partial pressure between 10−28 and 1 bar in the temperature range of 873–1173 K. The activation energy for the conductivity at an oxygen partial pressure of 10−4 bar was 0.29 eV. This value was too small to be assigned for oxide ion conduction, indicating that, in oxidizing atmospheres, electronic conduction is dominant due to Nb doping. On the other hand, the oxygen partial pressure dependence of conductivity was complic

Biogas as renewable source of energy is underexploited. We extrapolate the potential recoverable from waste streams in the EU-15 to 769 PJ (17.5 Mtoe), of which under 10% is used (1.7 Mtoe). SOFC can promote the valorisation of biogas in small CHP installations (10-500 kWel). An energy/exergy balance model was performed on a SOFC demonstration unit coupled to an existing farm biogas site. From 8.9 kW of biogas, the module was calculated to derive 3.4 kWel and 4.1 kW useful heat, achieving 38% electrical and

Our planar SOFC stacking technology uses unprofiled metallic interconnects (MIC) and thin cells of tape cast anode supported YSZ. The key element is the gas diffusion layer (GDL) between cell and MIC, which consists of so-called SOFConnex™. Using square ce ...

Performance degradation data obtained on single solid oxide fuel cells tested at 850°C with air and humidified H2 and using Ni-YSZ anode supported cells are presented. Microscopic investigation is carried out on both anode and cathode to quantify variation ...

Although the effects of impurities on the Ni-YSZ electrode of a solid oxide cell in fuel cell operation have been studied, reports on their effects during electrolysis operation are limited. Here, short-term experiments at various current densities and a d ...

Correlating the microstructure of an energy conversion device to its performance is often a complex exercise, notably in solid oxide fuel cell research. Solid oxide fuel cells combine multiple materials and interfaces that evolve in time due to high operat ...

The harmful impacts of fossil-fuel-based engines on the environment have resulted in the development of other alternatives for different types of vehicles. Currently, batteries and fuel cells are being used in the automotive industry, while promising progr ...

This study examines a novel Solid Oxide Fuel Cell (SOFC) cogeneration system powered by liquefied natural gas integrating realistic and flexible heat management to support efficient maritime applications. With a nominal power capacity of 125 kW, the SOFC-b ...

Nd-Nickelate (NNO), Nd1.95NiO4+delta, an alternative solid oxide fuel cell cathode material, has been imaged and mapped in 3D using synchrotron-based x-ray nanotomography. The NNO cathode material, which suffered from silicon contamination during fabricati ...

This paper presents a multi-objective optimization of a novel integration of a steam turbine in a solid-oxide electrolyser-based power-to-methane system that leverages exothermic stack operation by converting excess heat back into electricity. Exothermic operation of the stack is beneficial as the outlet gases can be used to pre-heat the inlet gases. The analysis is also extended to co-electrolysis followed by syngas methanation, which differs significantly in thermal integration compared to conventional st

Solid Oxide Fuel Cells (SOFCs) offer high efficiency and fuel flexibility, yet their long-term stability under biogas-derived fuels remains insufficiently understood. This work investigates the electrochemical behaviour and degradation mechanisms of a Ni–YSZ anode-supported cell operated sequentially in dry hydrogen (DH), cold recirculation of biogas before reformer (CB), and hot recirculation of biogas before reformer (HB). The study combines voltage monitoring, IV curves, electrochemical impedance spectro

Ammonia (NH3) has 17.8 wt% hydrogen and is easily liquified at 25°C and 8 bar pressure. Ammonia is carbon-free and can be produced sustainably at large scale and low cost. Solid oxide fuel cells generate electricity with efficiencies greater than 60% and c ...

The aggravation of climate change calls for the timely development and implementation of highly efficient, renewable, zero- or negative-emission energy solutions with high technological readiness and feasibility levels. Solid oxide fuel cells (SOFC) consti ...

Urea is widely used in agriculture, industry, and food, while it is also a potential fuel. Large-scale urea production relies on fossil fuels, thus there is a strong need for green urea given the increasing penetration of renewable energy sources. A potent ...

The performance of solid oxide cells is known to be dependent upon the density of three phase boundaries (TPB), but the potential for improving their effective electrocatalytic activity by morphological adjustments is imprecisely known. A spilling algorith ...

Electrical output behaviour obtained on solid oxide fuel cell stacks, based on planar anode supported cells (50 or 100 cm2 active area) and metallic interconnects, is reported. Stacks (1–12 cells) have been operated with cathode air and anode hydrogen flow ...

Hydrothermal gasification (HTG) is a promising technology that allows the recovery of nutrients from wet biomass with simultaneous production of an energy-rich gas. In this work, wastewater effluent (leachate) obtained from a composter sanitary system oper ...

In this review paper, a critical assessment of the main degradation processes in three key components of solid oxide fuel cells and electrolysers (negative and positive electrodes and the interconnect) is undertaken, attempting prioritization of respective ...

With a growing energy demand in a carbon-constrained society, fuels cells powered by renewable fuels, and specifically solid waste, are seen as interesting contributors to the energy portfolio. The alternative energy industry needs to reduce costs, enhance ...

Jan Van Herle

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Techno-economic evaluation of biomass-to-fuels with solid-oxide electrolyzer

Electrical properties and defect structure of niobia-doped ceria

Biogas exploitation by SOFC

Design of 500 W Class SOFC Stack with Homogeneous Cell Performance

Experimental and Theoretical Investigation of Degradation Mechanisms in SOFC Electrodes

Poisoning effects of chlorine on a solid oxide cell operated in co-electrolysis

Operando analysis of a solid oxide fuel cell by environmental transmission electron microscopy

The Application of Fuel-Cell and Battery Technologies in Unmanned Aerial Vehicles (UAVs): A Dynamic Study

A novel waterborne Solid Oxide Fuel Cell-based cogeneration system with realistic heat management

Three-dimensional microstructural mapping of poisoning phases in the Neodymium Nickelate solid oxide fuel cell cathode

Thermal management of a solid-oxide electrolyser-based power-to-methane system: comparing heat generation minimization and power regeneration

Electrochemical performance and degradation behaviour of Ni–YSZ anode-supported SOFC operated with pre-processed biogas

Performance Analysis of Ammonia in Solid Oxide Fuel Cells

Readiness evaluation of SOFC-MGT hybrid systems with carbon capture for distributed combined heat and power

Techno-economic comparison of 100% renewable urea production processes

Characterization of local morphology and availability of triple-phase boundaries in solid oxide cell electrodes

Dynamic behaviour of SOFC short stacks

A combined hydrothermal gasification - solid oxide fuel cell system for sustainable production of algal biomass and energy

Addressing planar solid oxide cell degradation mechanisms: A critical review of selected components

Techno-Economic Optimization of an Integrated Biomass Waste Gasifier–Solid Oxide Fuel Cell Plant