The ionic liquid 1-ethyl-3-methylimidazolium methanesulfonate revisited: Solubility of carbon dioxide over an extended range of temperature and pressure

Characterization of leachates from drainage asphalt pavement under multi-factor environmental treatments

Pavement leachates could cause considerable environmental contamination. However, the influence of multiple environmental factors on the compositions of pavement leachates is still ill-understood. Therefore, it is necessary to analyse the variation of bitumen leachates with environmental factors and accordingly clarify the leaching mechanism. For this reason, a multi-environment device was invented to perform single-factor, two-factor and full-climate environmental treatments on open-graded friction courses (OGFC) asphalt mixtures. Subsequently, the acidity and alkalinity (pH) value, metal element composition and conductivity of the bitumen leachates with varying environmental treatments were characterized and analysed. Based on this, the leaching mechanism of bitumen leachates dissolved in water was proposed. The results indicated that the bitumen compositions were influenced by different environmental treatments, inducing the variation of pavement leachates. The primary substances of pavements leachates were composed of the organic acid substances and minor metal element ions. Accordingly, the experiment results demonstrated the increase of conductivity, and partial metal element concentration with the extension of treatment time. In terms of the pH value, an initial increase followed by a progressive decrease was observed.

Reviewing and screening ionic liquids and deep eutectic solvents for effective CO2 capture

CO₂ capture is essential for both mitigating CO₂ emissions and purifying/conditioning gases for fuel and chemical production. To further improve the process performance with low environmental impacts, different strategies have been proposed, where developing liquid green absorbent for capturing CO₂ is one of the effective options. Ionic liquids (IL)/deep eutectic solvents (DES) have recently emerged as green absorbents with unique properties, especially DESs also benefit from facile synthesis, low toxicity, and high biodegradability. To promote their development, this work summarized the recent research progress on ILs/DESs developed for CO₂ capture from the aspects of those physical- and chemical-based, and COSMO-RS was combined to predict the properties that are unavailable from published articles in order to evaluate their performance based on the key properties for different IL/DES-based technologies. Finally, top 10 ILs/DESs were listed based on the corresponding criteria. The shared information will provide insight into screening and further developing IL/DES-based technologies for CO₂ capture.

Effectiveness of ionic liquid-supported membranes for carbon dioxide capture: a review

The world's population explosion creates a need for natural resources for energy, which will become a significant contributor to global climate change. As we all know, carbon dioxide (CO₂) is one of the most critical elements of the global greenhouse gas effect. CO₂ capture and storage innovations have piqued researchers' attention in recent decades. Compared to other methods, membrane separation has some positive performance in CO₂ capture. CO₂ capture with membrane separation using enhanced ionic liquids (ILs) is described in this review. ILs have made an appearance in CO₂ capture work as the potential additive, and companies and academics have been interested in CO₂ separation for the past two decades. This article comprehensively analyzes the current modern approach in ILs and IL-based membranes for gas separation processes. Based on the latest literature and performance data, this work provides a complete compressive examination of types of ILs and IL-supported membrane performances. ILs for CO₂ capture were also explored, and IL-based membranes for different ILs were also studied. This study emphasizes the supremacy of novel ILs for CO₂ capture in membrane separation.