The United States of America As Represented by the Department of Energy

U.S. Department of Energy

Yee Soong

McMahan L Gray

Brian W Kail

Kenneth J Champagne

Douglas E Allen

Thomas P Filburn

Walter C Wilfong

Chen Zhu

Robert Dilmore

Sheila Hedges

Walter C Wifong

Arthur G Blackwell

Thomas A Link

Micael R Schoffstall

The disclosure describes a pelletized sorbent comprising a first component comprising Basic Immobilized Amine Sorbent, a second component comprising inorganic strength additive, and a third component comprising polymer binder, where the Basic Immobilized Amine Sorbent and solid inorganic strength additive are interconnected by the polymer binder. The pelletized sorbent is useful for removing COfrom a gaseous mixture such as a post combustion gas stream.

Pelletized immobilized amine sorbent for COcapture

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A neutralization/sequestration process is provided for concomitantly addressing capture and sequestration of both COand SOfrom industrial gas byproduct streams. The invented process concomitantly treats and minimizes bauxite residues from aluminum production processes and brine wastewater from oil/gas production processes. The benefits of this integrated approach to coincidental treatment of multiple industrial waste byproduct streams include neutralization of caustic byproduct such as bauxite residue, thereby decreasing the risk associated with the long-term storage and potential environmental of storing caustic materials, decreasing or obviating the need for costly treatment of byproduct brines, thereby eliminating the need to purchase CaO or similar scrubber reagents typically required for SOtreatment of such gasses, and directly using COfrom flue gas to neutralize bauxite residue/brine mixtures, without the need for costly separation of COfrom the industrial byproduct gas stream by processes such as liquid amine-based scrubbers.

Two methods are provide for the separation of carbon dioxide from the flue gases. The first method utilizes a phase-separating moiety dissolved in an aqueous solution of a basic moiety to capture carbon dioxide. The second method utilizes a phase-separating moiety as a suspended solid in an aqueous solution of a basic moiety to capture carbon dioxide. The first method takes advantage of the surface-independent nature of the COabsorption reactions in a homogeneous aqueous system. The second method also provides permanent sequestration of the carbon dioxide. Both methods incorporate the kinetic rate enhancements of amine-based scrubbing while eliminating the need to heat the entire amine solution (80% water) in order to regenerate and release CO. Both methods also take advantage of the low-regeneration temperatures of CO-bearing mineral systems such as NaCO/NaHCOand KCO/KHCO.

A method is provided for making low-cost COsorbents that can be used in large-scale gas-solid processes. The improved method entails treating an amine to increase the number of secondary amine groups and impregnating the amine in a porous solid support. The method increases the COcapture capacity and decreases the cost of utilizing an amine-enriched solid sorbent in COcapture systems.

High capacity immobilized amine sorbents

An autoclave reactor allows for the ultrasonic analysis of slurry concentration and particle size distribution at elevated temperatures and pressures while maintaining the temperature- and pressure-sensitive ultrasonic transducers under ambient conditions. The reactor vessel is a hollow stainless steel cylinder containing the slurry which includes a stirrer and a Ngas source for directing gas bubbles through the slurry. Input and output transducers are connected to opposed lateral portions of the hollow cylinder for respectively directing sound waves through the slurry and receiving these sound waves after transmission through the slurry, where changes in sound wave velocity and amplitude can be used to measure slurry parameters. Ultrasonic adapters connect the transducers to the reactor vessel in a sealed manner and isolate the transducers from the hostile conditions within the vessel without ultrasonic signal distortion or losses.

Ultrasound analysis of slurries

A process for separating organic and inorganic particles from a dry mixture by sizing the particles into isolated fractions, contacting the sized particles to a charged substrate and subjecting the charged particles to an electric field to separate the particles.

Device and method for separating minerals, carbon and cement additives from fly ash

A new method for making low-cost CO sorbents that can be used in large-scale gas-solid processes. The new method entails treating a solid substrate with acid or base and simultaneous or subsequent treatment with a substituted amine salt. The method eliminates the need for organic solvents and polymeric materials for the preparation of CO capture systems.

Growing community of inventors

Monroeville, PA, United States of America

Yee Soong