Optimizing the oxide support composition in Pr-doped CeO₂ towards highly active and selective Ni-based CO₂ methanation catalysts

In this study, Ni catalysts supported on Pr-doped CeO₂ are studied for the CO₂ methanation reaction and the effect of Pr doping on the physicochemical properties and the catalytic performance is thoroughly evaluated. It is shown, that Pr³⁺ ions can substitute Ce⁴⁺ ones in the support lattice,...

On anammox activity at low temperature: Effect of ladderane composition and process conditions

The application of partial nitritation-anammox (PN/A) under mainstream conditions can enable substantial cost savings at wastewater treatment plants (WWTPs), but how process conditions and cell physiology affect anammox performance at psychrophilic temperatures below 15 °C remains poorly understood. We tested 14 anammox communities, including...

Service life prediction of concrete structures under chloride environment based on Monte Carlo method

Transport of chlorides is one of the most critical factors determining the service life of concrete structures under ocean environments, and diffusion is usually regarded as the major mechanism for the transport of chloride ions into concrete. As chloride diffusivity is affected by temperature, most existing service life prediction models use...

Modelling of autogenous shrinkage of hardening cement paste

In recent decades, several simulation models have been proposed to predict autogenous shrinkage of cementitious systems. In most of these models, however, only the elastic deformation caused by self-desiccation of the hydrating cement paste is considered. In fact, cement paste is not an ideal elastic material. Also the time-dependent...

Isothermal calorimetric study on the heat evolution and the apparent activation energy of alkali-activated slag/fly ash pastes

Alkali-activated slag/fly ash (AASF) as an environmental-friendly binder system for construction materials has recently attracted great attention from both academic and industrial communities. Towards its wider engineering application, it is crucial to have a better understanding of the temperature induced effects by different curing regimes and...