IFP Énergies nouvelles

Dynamics and coordination of water and carbon footprints in China, 2007–2023: drivers and supply-chain pathways

Coordinated water and carbon management requires identifying not only whether the two environmental pressures change in the same direction, but also which socioeconomic drivers and supply-chain pathways generate co-benefits or trade-offs. Existing studies rarely integrate tempora...

On the role of error metrics in the assessment of chemical kinetic mechanisms

Methods intended to decrease the computational cost of chemistry, such as mechanism reduction, neural-network surrogates, or genetic optimization, rely on metrics to assess agreement with reference datasets. However, the role of error definitions in the design of these metrics re...

Surface Geochemistry of Natural Hydrogen: Modelling of Soil Artefacts Versus Active Hydrogen Seeping

Measurements of the soil’s surface for natural hydrogen exploration may be considered dubious due to several artefacts. For instance, drill bit metamorphism and superficial biological activity can induce hydrogen generation that is irrelevant for energy exploration. Furthermore,...

Active learning strategies for the estimation of a feasible set defined from a vector output black-box simulator

Many industrial problems require the use of black-box numerical simulators, for which it is essential to determine the set of so-called feasible input parameters. A set of parameters is feasible if the output of the code on these parameters satisfies given constraints, for exampl...

Experimental mineralogical replacement to investigate the role of texture on interface morphology, reaction kinetics and pore-scale transport during metasomatism

Dolomitization is a key diagenetic process that reorganizes porosity and permeability in carbonate rocks, yet the coupling between interface kinetics and transport heterogeneity remains poorly constrained. We performed time-resolved hydrothermal dolomitization (metasomatism) expe...

Examples of counterexamples: a book conspectus

A counterexample is any exception to a generalization. Counterexamples are often used in science (and philosophy), as a means to setting boundaries. In mathematics at large, well-chosen counterexamples may bound possible theorems, disprove certain conjectures. Recent breakthrough...