Adsorption power for removing mercury from high temperature high moisture gas streams
AssigneeMerck & Co., Inc.
InventorsRudy J. Maes, Youssef El-Shoubary, Subash Seth
Life of this patent
Estimating the term…
Abstract
There is disclosed an adsorption powder effective for capturing mercury from a high temperature, high moisture gas stream comprising: about 1-97% carbon; about 1-97% of alkaline material; about 1-97% cupric chloride impregnated carbon, and about 1-60% carbon impregnated with KI3. Additionally, a method of removing mercury from high temperature, high moisture gas streams, using the adsorption powder of the invention, is disclosed.
Claims5
A method of recovering mercury and other metal, dioxins, furans and other organic compounds from a gas stream using an adsorption powder, characterized as containing about 40% carbon, about 40% of alkaline material, about 10% cupric chloride impregnated carbon, and about 10% KI3 impregnated carbon, the method comprising the steps of:
- a) placing a solid phase mercury-containing contaminated soil into a rotary kiln/drum;
- b) heating said kiln/drum containing said soil to form gaseous and solid components;
- c) transferring the gaseous component of said soil to an exhaust cleaning unit/afterburner and the solid component of clean soil to a soil cooling unit;
- d) heating the gaseous component of said contaminated soil in said exhaust cleaning unit/after burner;
- e) cooling the gaseous component of said contaminated soil;
- f) adding the adsorption powder to the gasous component;
- g) transferring the powder-containing gaseous component to a baghouse;
- and
- h) releasing the substantially mercury-free gaseous component to the atmosphere.
A method for removing mercury and other metals, dioxins, furans and other organic compounds from a gas stream using an adsorption powder characterized as containing a carbon-based powder and an effective amount of cupric chloride, the method comprising the steps of:
- a) placing a solid phase mercury-containing contaminated soil into a rotary kiln/drum;
- b) heating said kiln/drum containing the soil to a temperature of about 900° F. to form gaseous and solid components and to volatize the organic compounds;
- c) transferring the gaseous component to an exhaust cleaning unit/afterburner and the solid component to a soil cooling unit;
- d) heating the gaseous component in the exhaust cleaning unit/afterburner to a temperature of about 1800° F.;
- e) cooling the gaseous component to a temperature of about 360° F.;
- f) adding the adsorption powder to the gasous component to absorb mercury and other metals;
- g) transferring the adsorption powder-containing gaseous component to a baghouse;
- and
- h) releasing the substantially mercury-free gaseous component to the adsorption powder to the atmosphere.
Dependencies are inferred from the claim text.