University of Massachusetts

Bionomic Industries Inc.

Chen-Lu Yang

Yong K Kim

Steven B Warner

Qinguo Fan

Sukalyan Sengupta

Samuel C Ugbolue

Kumari I Kaushik

John Enhoffer

Tabish Nawaz

Olena Kyzymchuk

A process and method for removing hydrogen sulfide from a gas and regenerating ferric ions consumed in the hydrogen sulfide scrubbing process at low pH. A two-scrubber regenerative chemical scrubbing system for removing hydrogen sulfide from a gas that provides an economical system for removing hydrogen sulfide from a gas at low pH without the need for chelating agents. An oxide of manganese is used as a catalyst to enhance the regeneration of ferric ions in an aqueous solution under acidic conditions in the presence of oxygen. The process may further include contacting the aqueous solution with a second gas comprising air to replenish the dissolved oxygen in the aqueous solution. The regenerated solution comprising ferric ions can be reused to treat additional hydrogen sulfide containing gases.

Process for hydrogen sulfide scrubbing and method for ferric ion regeneration

In a method for electrochemical ammunition disposal and material recovery, ammunition cartridges are placed in an acidic aqueous solution that is in contact with a cathode and an anode. The ammunition cartridges have a casing that includes an alloy of copper and zinc. The ammunition cartridges are agitated in the acidic aqueous solution as a voltage is applied between the anode and the cathode. The applied voltage is effective to oxidize and dissolve zinc from the copper-zinc alloy. Copper metal derived from the alloy can be recovered as a solid, and zinc ion derived from the alloy can be recovered as a solution.

Method and apparatus for electrochemical ammunition disposal and material recovery

Silver is recovered as Agnanoparticles from the spent solution obtained from the regeneration of an Ag-loaded ion exchange resin using electrolysis. The reclaimed regenerant solution is recycled and reused in a closed-loop scheme over multiple cycles. The recovered Agnanoparticles are monodisperse, spherical in shape, and have a mean diameter of about 6 nm.

Silver recovery as Agnanoparticles from ion-exchange regenerant solution

Auxetic fabric structures, of the sort which can be useful in conjunction with composite materials, and related methods of fabrication.

Auxetic fabric structures and related fabrication methods

Growing community of inventors

Westport, MA, United States of America

Chen-Lu Yang