SYSTEM AND PROCESS FOR CAPTURE OF ACID GASSES AT ELEVATED PRESSURE FROM GASEOUS PROCESS STREAMS
A system, method, and material that enables the pressure-activated reversible chemical capture of acid gasses such as CO2 from gas volumes such as streams, flows or any other volume. Once the acid gas is chemically captured, the resulting product typically a zwitterionic salt, can be subjected to a reduced pressure whereupon the resulting product will release the captures acid gas and the capture material will be regenerated. The invention includes this process as well as the materials and systems for carrying out and enabling this process.
Electrolyte for Stable Cycling of High-Energy Lithium Sulfur Redox Flow Batteries
Capture and Release of Mixed Acid Gasses with Binding Organic Liquids
“Switchable Solvents,” recently discovered by Philip Jessop (Queens University, Canada) and David Heldebrant (Nature, 2005, 436, 1102), show promise as attractive CO2 capture and transfer agents. The alcohol/amidine or guanidine liquid blend chemically binds CO2 at any CO2 pressure to form an ionic amidinium (R2 = C) or guanidinium (R2 = N) alkylcarbonate salt, which is liquid at room temperature (ionic liquid, Figure 1). Switchable Solvent systems are liquid, non-corrosive CO2 trapping agents, whether CO2 is bound or not. The homogeneous liquid phase without a precipitate offers tremendous engineering advantages compared to corrosive liquid, solid or multi-phase chemical trapping agents. Switchable Solvents can be regenerated with gentle heating (50 ˚C) under N2, releasing bound CO2. The release of CO2 is also attainable at room temperature by sparging the system with N2, however the rate of CO2 release is much slower. Switchable Solvents are highly tunable, reversible, and recyclable.
Capture and Release of Acid-Gasses with Acid-Gas Binding Organic Compounds
“Switchable Solvents,” recently discovered by Philip Jessop (Queens University, Canada) and David Heldebrant (Nature, 2005, 436, 1102), show promise as attractive CO2 capture and transfer agents. The alcohol/amidine or guanidine liquid blend chemically binds CO2 at any CO2 pressure to form an ionic amidinium (R2 = C) or guanidinium (R2 = N) alkylcarbonate salt, which is liquid at room temperature (ionic liquid, Figure 1). Switchable Solvent systems are liquid, non-corrosive CO2 trapping agents, whether CO2 is bound or not. The homogeneous liquid phase without a precipitate offers tremendous engineering advantages compared to corrosive liquid, solid or multi-phase chemical trapping agents. Switchable Solvents can be regenerated with gentle heating (50 ˚C) under N2, releasing bound CO2. The release of CO2 is also attainable at room temperature by sparging the system with N2, however the rate of CO2 release is much slower. Switchable Solvents are highly tunable, reversible, and recyclable.
Hybrid Anodes for Energy Storage Devices
This invention relates to a hybrid design of connected carbon-metal electrode for advanced Na and Li batteries. The invention covers the following: 1. A hybrid electrode made of connected carbon and metal electrode for Li and Na battery applications. The carbon can be intercalation carbon, high surface area carbon, or hard carbon. The carbon and the metal can be connected as speparate electrodes, or carbon coating on metal, or as mixed carbon-metal electrodes. 2. Li-S battery in which the anode is made of connected carbon-Li electrode. 3. Li-ion battery in which the anode is made of connected carbon-Li electrode. 4. Li-ion battery in which the anode is made of carbon-Si electrode. 5. Li-ion battery in which the anode is made of Carbon-metal electrode, and cathode is made of LiFePO4, LiMnPO4, mixed metal oxides, and mixed composites of the active materials, conductors and binders, or any combination of the cathdoe and anode materials. 6. Na-ion battery in which the anode is made of connected carbon-Na electrode. 7. Na-ion battery with carbon-Na anode, and any combination of the cathdoe and anode materials. 8. Li-air battery in which the anode is made of connected carbon-Li electrodes. 9. Other metal air battery in which the anode is made of connected carbon-metal electrodes. 10. Hybride capacitor-battery devices using connected active metal, active carbon as one of the electrode materials.
Amanda Lines, PhD, Chemist
Hybrid Energy Storage Devices Having Sodium
The present invention discloses a novel ZEBRA-type sodium-sulfur (Na-S) battery. The cathode consists of active material of sulfur mixed with Ni current collector. NaAlCl4 is employed as the catholyte, which is similar to that in ZEBRA batteries. This new type of battery retains most of the advantages of the state-of-the-art Na-S and ZEBRA batteries while overcoming the related deficits. The most attractive features of this new battery are the lower operating temperature, higher energy density and better cycle life than both Na-S and ZEBRA batteries, which makes it suitable for renewable integration and grid applications, along with commercial or fleet transportation.
Wu Xu
Wu Xu is making electric vehicles and our nation’s power grid more energy efficient and stable. His technologies also are enabling the grid to store renewable energy from wind, sun, and waves so that it can be released when needed.