Capturing CO2 Emissions in Concrete Production || скачать в хорошем качестве

Capturing CO2 Emissions in Concrete Production ||

That's a fascinating avenue of research! Carbon capture and utilization (CCU) technologies have been gaining traction as a means to mitigate greenhouse gas emissions from industrial sources. Integrating captured CO2 into concrete production not only reduces the carbon footprint of concrete but also offers the potential for improved mechanical properties. Here are some methods and considerations for incorporating CO2 into concrete production: Direct CO2 Capture: Various methods exist for capturing CO2 directly from industrial emissions, such as absorption, adsorption, and membrane separation. Once captured, CO2 can be purified and utilized in concrete production. Carbonation of Concrete: CO2 can be directly injected into concrete mixtures during production, where it reacts with calcium hydroxide (Ca(OH)2) to form calcium carbonate (CaCO3). This process, known as carbonation, not only sequesters CO2 but also enhances the strength and durability of concrete over time. Alkaline Activation: Alkaline activation involves using alkaline solutions, such as sodium hydroxide (NaOH), to activate industrial by-products like fly ash or slag. This process not only sequesters CO2 but also produces a binder that can replace or supplement Portland cement in concrete mixtures. Bio-based Carbonation: Some researchers are exploring the use of biological processes, such as microbial-induced carbonate precipitation, to facilitate carbonation in concrete. This method harnesses the metabolic activity of microorganisms to convert CO2 into calcium carbonate, thereby reducing the carbon footprint of concrete. Nano-additives: Nanomaterials, such as nano-silica or nano-calcium carbonate, can be incorporated into concrete mixtures to enhance carbonation and improve mechanical properties. These additives provide nucleation sites for carbonation reactions, resulting in denser and stronger concrete. Life Cycle Assessment (LCA): It's essential to conduct a comprehensive life cycle assessment to evaluate the environmental impacts and benefits of incorporating CO2 into concrete production. This assessment considers factors such as energy consumption, raw material extraction, transportation, and end-of-life disposal to ensure the overall sustainability of the concrete. By integrating CO2 capture technologies with concrete production processes, we can significantly reduce the carbon footprint of concrete while simultaneously enhancing its mechanical properties and contributing to sustainable construction practices. Mission Ahead, #CNN Business, CNNB, tech, carbon dioxide, greenhouse gas, CarbonCure, CNN, science, news, concrete, cnnmoney, #co2, climate change, #Business, rachel crane, latest, #videos, environment