This invention describes a single-stage preparation of a novel carbon capture fiber sorbent. This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.

Challenge
Conventional pressure- or temperature-swing adsorption (PSA/TSA) processes have been widely considered for post-combustion carbon capture and direct air capture (DAC). However, the processes of pressurizing the flue gas in the case of PSA or the long regeneration time in the case of TSA are considered neither cost-effective nor energy efficient, which limit their use in large-scale carbon capture processes. Furthermore, the high heat released during carbon dioxide (CO₂) adsorption onto conventional sorbent amine sites necessitate efficient heat redistribution away from the sorbent bed and back into the overall carbon capture process. Therefore, a low-cost and energy efficient carbon capture process that could be retrofitted onto existing power plants is needed.

The invention is a family of hydrophobic, low viscosity, low vapor pressure physical solvents with molecular structures consisting of two or more alkyl-ester functional groups on a central hydrocarbon chain. These solvents have been shown to possess high carbon dioxide (CO₂) solubility and absorption selectivity, which make them well suited for the removal of CO₂ from hydrogen (H₂) produced from synthesis gas. This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.

Challenge
Future integrated gasification combined cycle (IGCC) power plants and steam methane reforming (SMR) chemical plants have the potential to reduce the cost of CO₂ capture. These power and chemical plants generate high-pressure CO₂ gas streams from the in-situ water gas shift reaction when producing H₂ used to power the electrical turbines. A variety of methods have been proposed to capture CO₂, including solvent, sorbent, and membrane technologies, with continuous solvent looping systems currently considered to be the most advanced. Precombustion capture of CO₂ is typically accomplished using physical solvents.

State-of-the-art precombustion CO₂ capture processes predominantly employ hydrophilic physical solvents. Current commercial physical solvents touted for IGCC CO₂ capture were developed for removing acid gases from raw natural gas streams. Therefore, they were designed to remove significant amounts of water from the process gas. As such, the focus was on the purification of the process gas with less concern for generation of high-purity CO₂ streams suitable for pipeline transmission and sequestration. While water removal is important for natural gas pipeline applications, it is not favorable for applications in which the fuel stream is directly combusted on-site, as would be encountered in IGCC systems.

The invention is method of fabricating a hollow glass waveguide (tube that transmits light) that exhibits low loss in the visible or short-wave spectral region and is optimized for Raman spectroscopy or visible laser beam delivery. Prior art hollow capillaries suffer high optical loss and poor visible transmission, but the NETL invention produces these high-quality capillaries via a specialized deposition system. This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.

Challenge
Currently, there are no high-quality commercially produced visible-wave hollow waveguides. Commercial vendors can produce reasonable IR hollow waveguides, but visible-range waveguides exhibit high losses and high optical noise. The patented NETL Raman Gas Analyzer requires visible-range hollow waveguides with small internal diameters (a few hundred microns) and low optical noise. No vendor could produce these waveguides, so NETL constructed this new system of waveguide fabrication. Other spectroscopic systems would benefit from better waveguides including absorption spectrometers, microscopes, sensors, etc.
 

NETL has developed a unique biocatalyst that is robust to environmental challenges and adaptable to feedstock and condition variability.

To combat climate change and move towards a circular carbon economy, technologies are needed to capture, store, and/or convert waste carbon. Microbial gas fermentation is one approach that exploits the natural ability of microorganisms to capture and utilize gaseous waste feedstocks. 

The NETL process uses an enriched microbial biocatalyst to convert carbon into acetate and other short-chain fatty acids. The innovation represents an improved way for direct conversion of carbon dioxide (CO₂) and CO waste gases into value added products with a lower carbon footprint and energy inputs compared to current methods for production of commercial short-chain fatty acids. 

The global acetic acid market is estimated to be $21.5 billion and projected to reach $34.2 billion by 2030.

The invention is available for license and/or CRADA.

Challenge
To combat climate change, slow CO₂ emissions, and move towards a circular carbon economy, technologies are needed to capture, store, and/or convert waste carbon. Microbial gas fermentation is one approach that exploits the natural ability of microorganisms to capture and utilize gaseous one-carbon waste feedstocks.

These technologies are high-performance CO₂ separation membranes made from polyphosphazene polymer blends.  NETL’s technology was originally developed to aid in separating CO₂ from flue gas emitted by fossil-fuel power plants. The NETL membrane is cross-linked chemically using low intensity UV irradiation, a facile technique that improves the membrane’s mechanical toughness compared to its uncrosslinked polyphosphazene constituents. Membranes fabricated with this technique have demonstrated permeability of up to 610 barrer, with CO₂/N₂ selectivity in excess of 30, at a practical separation temperature of 40°C. NETL’s patent-pending technology is being bundled with Idaho National Laboratory’s (INL) patented technology, with NETL handling licensing.  NETL would work with a potential licensee and INL to license the technology. 

Challenge: 
Membrane-based separation is one of the most promising solutions for CO₂ removal from post-combustion flue gases produced in power generation. Technoeconomic analyses show that membranes aimed for this application must possess high gas permeability; however, most high permeability materials suffer from poor mechanical properties or unacceptable loss in performance over time due to physical aging. This technology is a successful attempt to turn one of these high-performance materials with poor mechanical properties into one amenable for use in practical separation membranes with virtually no physical aging issues.
 

This invention describes the synthesis and application of nanostructured copper (Cu) catalysts that selectively convert carbon dioxide (CO₂) into carbon monoxide (CO). This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.

Challenge
The electrochemical CO₂ reduction reaction (CO₂RR) is an appealing strategy for addressing man-made CO₂ emissions because it can leverage excess renewable energy to produce carbon-neutral chemicals and fuels. However, the economic viability of large-scale CO₂RR systems will depend on the ability to selectively and efficiently form desirable products. Because it is earth-abundant and can produce a variety of products, Cu is a popular CO₂RR catalyst. Unfortunately, the wide product distribution of Cu introduces inefficiencies in the form of chemical separation steps.

This invention describes basic immobilized amine sorbents (BIAS) with improved pelletization process and formulation for use in CO₂ capture processes. This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.

Challenge
BIAS sorbents demonstrate high CO₂ capture capacity and thermal stability over multiple steam regeneration cycles and represent a promising approach for CO₂ removal from a variety of source points, including coal and natural gas combustion power plants. Bench- and pilot-scale testing have demonstrated the feasibility of commercial-scale BIAS sorbents. However, full commercialization of BIAS sorbents requires pelletization. Commercially available silica typically serves as the support for amine-based particle sorbents, yet these materials are not commercially feasible due to their relatively low mechanical strength and difficult management in dynamic reactor systems. Thus, the development of an economical method of fabricating a strong silica-supported BIAS pellet is a primary concern.

Research is active on a method to convert methane into synthesis gas using mixed metal oxides. The resulting syngas could be used to manufacture more valuable chemicals. This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.

Challenge

Natural gas (NG), which is composed primarily of methane, is one of the most abundant, low-cost carbon-containing feedstocks available. The economically available route to produce valuable chemicals from methane is via synthesis gas followed by different chemical routes to manufacture the desired chemicals. In a large-scale industrial plant, the production of syngas accounts for a large part of the total costs. Therefore, it is important to develop more efficient and cost-effective methods for the conversion of methane to syngas.

The U.S. Department of Energy’s National Energy Technology Laboratory (NETL) has developed a laser induced breakdown spectroscopy (LIBS) probe featuring simplified construction that minimizes the need for optical elements from the probes data collection path, reducing potential interference with the transmission of high quality spectra. By reducing the complexity and cost of the laser head, the invention maximizes the amount and quality of light returned for analysis and increases the usefulness of LIBS research.

Research is currently active on the patented technology titled, "Kick Detection at the Bit Using Wellbore Geophysics." This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy’s National Energy Technology Laboratory.