Available Technology

Synthesis and use of Triazolium-based Ionic Liquid Sorbents for CO2 Capture

Research is active on the development and application of triazolium-based ionic liquids for carbon capture applications. A portfolio of patented and patent pending technologies is available for licensing and/or further collaborative research from U.S. Department of Energy’s National Energy Technology Laboratory.
Fossil fuels will be used to provide clean, affordable energy well into the 21st century; however, the environmental impacts of greenhouse gases, particularly carbon dioxide (CO2), have troubling consequences. Carbon capture from fossil fuel-based power generation systems is a critical component of reducing the rise in atmospheric CO2 concentrations. Currently available carbon capture processes significantly reduce the efficiency and increase the electricity cost of fossil based power generation. More efficient and economical processes for CO2 capture are required. Ionic liquids (ILs) are organic salts that are commonly liquid at room temperature. ILs have many desirable features, such as tunable solubility, high ionic and electrical conductivity, low vapor pressure, and good thermal and electrochemical stability. However, the liquid nature of ILs is a barrier to their use in many device-based applications. These inventions describe the synthesis and use of a novel class of ILs, which are based on the triazolium chemical structure. Due to the synthetic flexibility of these compounds, a wide range of chemical functionality and tunable physical properties can be achieved. Some of the resulting ILs have improved properties over other IL classes, including increased CO2 solubility and thermal stability, facilitating their use for CO2 capture at higher temperature environments. Additionally, the ability to attach any chemical functionality on the triazolium core allows for radically polymerized ILs and co-polymerize with commodity monomers (styrene and acrylates). Under this portfolio, methodologies have been also developed for the encapsulation of ILs in hollow polymer beads.
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