Ca-based materials derived from calcined cigarette butts for CO capture and thermochemical energy storage.

Cigarette butts (CBs) are one of the most common types of litter in the world. Due to the toxic substances they contain, the waste generated poses a harmful risk to the environment, and therefore there is an urgent need for alternative solutions to landfill storage. Thus, this work presents a possible revalorization of this waste material, which implies interesting environmental benefits.

Magnesium calcites for CO capture and thermochemical energy storage using the calcium-looping process.

In this study, a precipitation-based synthesis method has been employed to prepare magnesium calcites with the general formula CaMgCO, with the objective of use them in the calcium looping (CaL) process for CO capture (CaL-CCS) and thermochemical energy storage (CaL-CSP). The structure and microstructure of the samples have been characterized. It has been found by X-ray diffraction that the samples with a Ca:Mg molar ratio of 0.

Influence of Long-Term CaO Storage Conditions on the Calcium Looping Thermochemical Reactivity.

Long-term storage capability is often claimed as one of the distinct advantages of the calcium looping process as a potential thermochemical energy storage system for integration into solar power plants. However, the influence of storage conditions on the looping performance has seldom been evaluated experimentally. The storage conditions must be carefully considered as any potential carbonation at the CaO storage tank would reduce the energy released during the subsequent carbonation, thereby penalizing the round-trip efficiency.

Flexible Kinetic Model Determination of Reactions in Materials under Isothermal Conditions.

Kinetic analysis remains a powerful tool for studying a large variety of reactions, which lies at the core of material science and industry. It aims at obtaining the kinetic parameters and model that best describe a given process and using that information to make reliable predictions in a wide range of conditions. Nonetheless, kinetic analysis often relies on mathematical models derived assuming ideal conditions that are not necessarily met in real processes.

Structural, Vibrational, and Magnetic Characterization of Orthoferrite LaFeO Ceramic Prepared by Reaction Flash Sintering.

LaFeO perovskite ceramics have been prepared via reaction flash technique using FeO and LaO as precursors. The obtained pellets have been investigated using several techniques. The formation of LaFeO has been clearly confirmed by X-ray diffraction.