Calgon Carbon Corporation

Other

Richard A Hayden

Thomas M Matviya

Nicholas R Pollack

Bertrand W Dussert

David T Doughty

John W Cobes, Iii

Richard W Farmer

Steven L Butterworth

Fujito Ehara

John R Lutchko

Kishio Yoshino

Satoru Hisaki

A sorbent composition and process of making sorbent designed for the removal of contaminants from flue gas and subsequent use in cement or concrete formulations are discussed. The sorbent composition comprises a coal feed stock prepared to have a total BET surface area of at least 350 m/g, and wherein the sorbent has a cumulative surface area less than 10 m/g for pore diameters between 0.01 and 0.1 microns, a cumulative pore volume less than 0.055 cc/g for pore diameters between 0.01 and 0.1 microns, or both.

Inherently concrete-compatible carbon sorbents for mercury removal from flue gas

Methods and systems for reducing mercury emissions are provided herein. The methods, generally, include the steps of burning a heavy metal containing fuel source and introducing sorbent materials and introducing one or more halogen compounds into the combustion chamber and/or exhaust stream to remove the heavy metal.

Methods for removal of mercury from flue gas

Methods and systems for reducing mercury emissions from fluid streams are provided herein. In embodiments, mercury is removed from flue gas streams by injecting a dry admixture of a porous mercury adsorptive material and at least one halide containing agent into the flue gas stream.

Sorbent formulation for removal of mercury from flue gas

Methods and systems for reducing mercury emissions from fluid streams having a high concentration of sulfur oxide species are provided herein. In embodiments, mercury is removed from flue gas streams by injecting a dry admixture of a porous mercury adsorptive material and at least one dry agent into the flue gas stream.

Methods and systems for reducing mercury emissions from fluid streams having a high concentration of sulfur oxide species are provided herein. In embodiments, mercury is removed from flue gas streams containing sulfur trioxide (SO) by injecting a dry admixture of a porous mercury adsorptive material and at least one dry agent into the flue gas stream.

A method is provided for reducing the chemical conversion of oxidizable or disproportionable compounds contained in liquid or gaseous process media which contact carbonaceous chars. In this method the carbonaceous char contacting the oxidizable or disproportionable compounds is first treated with a non-nitrogen-containing Bronsted acid. The acid-treated char is then heated to temperatures greater than 750&deg; C. In this manner the inherent catalytic reactivity of the carbon in the char is reduced effectively and largely irreversibly.

Method for reducing the chemical conversion of oxidizable or disproportionable compounds contacting carbonaceous chars

A carbonaceous char is disclosed for the removal of metals from aqueous and other non-organic media. Carbonaceous chars having a normalized contact pH of less than 3 and preferably less than or equal to 2.5 provide enhanced metal removal from such media.

Carbon char for metals-removal

A carbonaceous char is provided having a reduced inherent carbon catalytic activity. The char is derived from one or more of the following: wood, nutshell, fruitstone, peat, lignite, sub-bituminous coal, bituminous coal, semi-anthracite coal, anthracite coal and organic polymers, and has an inherent or &ldquo;MOD 12&rdquo; t-&frac34; time equal to or greater than 125 minutes or a maximum delta T less than or equal to 20&deg; C. The MOD 12 t-&frac34; time is equal to the elapsed time required for 0.250 grams of said carbonaceous char, pulverized, to decompose from ambient temperature and under adiabatic conditions three-fourths of 0.42 moles of hydrogen peroxide contained in 150 mL of an aqueous solution containing a buffer having a pH of about 12. The maximum delta T is the absolute temperature difference between ambient temperature and the maximum temperature achieved by the hydrogen peroxide decomposition wherein the carbonaceous char has been inertly calcined at temperatures above 700&deg; C. and cooled to ambient temperature under inert conditions prior to measurement of the MOD 12 t-&frac34; time and the maximum delta T.

Carbonaceous chars having reduced catalytic activity

A process is provided for the manufacture of a carbonaceous char capable of catalyzing the rapid decomposition of hydrogen peroxide in aqueous solutions. This carbonaceous char is produced from a bituminous coal or a bituminous material that has been carbonized and extensively oxidized at low (less than 700&deg; C.) temperatures. The resultant carbonized and oxidized bituminous coal or bituminous material is then contacted with a nitrogen-containing compound in combination with at least one of sucrose or fructose as the temperature of the low-temperature char is increased to greater than 700&deg; C. This treatment results in a high-temperature char which may then be activated as desired. These activated chars show the aforementioned ability to rapidly decompose aqueous solutions of hydrogen peroxide and are also useful for the catalytic decomposition of H,S, SO,, NO,, chloramines, and/or peroxides in liquid and/or gaseous streams.

Process for making a co-impregnant catalyst carbon

A process is provided for reducing the inherent carbon catalytic reactivity of carbonaceous chars. In this process a carbonaceous char is contacted first with a Bronsted acid. The acid-treated char is then heated to temperatures greater than 750&deg; C. By this method the inherent catalytic reactivity of the carbon in the char is reduced effectively and largely irreversibly.

Reduced catalytic carbonaceous char and process for reducing the inherent carbon catalytic reactivity of carbonaceous chars

An improved process is provided for the removal of sulfur oxides from gas or vapor media containing oxygen and H.sub.2 O by contacting the media with a catalytically-active carbonaceous char. The improvement is provided by the use of a catalytically-active carbonaceous char prepared by low-temperature carbonization and oxidation of a bituminous coal or bituminous material at temperatures below 700.degree. C., followed by contact of the carbonized, oxidized char with one or more nitrogen-containing compounds at a temperature which is stable at, or is increasing to, temperatures less than 700.degree. C., and then increasing the temperature of the resultant material to or above 700.degree. C.

Method for sox removal by catalytic carbon

An improved process is provided for the manufacture of N-phosphonomethylglycine from N-phophonomethyliminodiacetic acid in the presence of a molecular-oxygen containing gas utilizing a catalytically active carbonaceous char. The improvement is provided by the use of a carbonaceous char capable of rapidly decomposing hydrogen peroxide in an aqueous solution.

Method for the manufacture of N-phosphonomethylglycine from

A process is provided for the manufacture of a carbonaceous char capable of catalyzing the rapid decomposition of hydrogen peroxide in aqueous solutions. This carbonaceous char is produced from a bituminous coal or a bituminous material that has been carbonized and extensively oxidized at low temperatures (less than 700.degree. C.). The resultant carbonized and oxidized bituminous coal or bituminous material is then contacted with a nitrogen-containing compound in combination with an aliphatic organic compound containing both ether and alcohol functionalities as the temperature of the low-temperature char is increased to minimally 700.degree. C. This treatment results in a high-temperature char which may then be activated as desired. These activated chars show the aforementioned ability to rapidly decompose aqueous solutions of hydrogen peroxide and are also useful for the catalytic chemical conversion of H.sub.2 S, SO.sub.x, NO.sub.x, chloramines, and/or peroxides in liquid and/or gaseous streams.

Growing community of inventors

Pittsburgh, PA, United States of America

Richard A Hayden