Tda Research, Inc.

Schlumberger Technology Corporation

Air Products and Chemicals, Inc.

Gokhan Alptekin

Ambalavanan Jayaraman

Steven Dietz

Diwakar Garg

Robert Quinn

Frederick Carl Wilhelm

Matthew Schaefer

Margarita DuBovik

Margarita Dubovik

Garg Diwakar

A carbon sorbent for removing carbon dioxide from a gaseous material includes a surface composition including carbon, nitrogen, and oxygen. The nitrogen atoms at the surface of the carbon sorbent may be present in pyridone, pyrrole, and pyridine. The surface of the carbon sorbent may include lactone groups and pyrone groups. The carbon sorbent may have a bulk density greater than about 0.40 grams per cubic centimeter. The carbon sorbent may be formed using amino acids to provide the nitrogen for the carbon sorbent. In addition, the use of processing aids during the formation of the carbon sorbent facilitates the formation of a denser carbon sorbent. Related methods of forming the carbon sorbent and pellets of the carbon sorbent are also disclosed.

Carbon sorbent formulations for carbon dioxide adsorption, and related methods

Sorbents and methods of using them for removing mercury from flue gases over a wide range of temperatures are disclosed. Sorbent materials of this invention comprise oxy- or hydroxyl-halogen (chlorides and bromides) of manganese, copper and calcium as the active phase for Hgoxidation, and are dispersed on a high surface porous supports. In addition to the powder activated carbons (PACs), this support material can be comprised of commercial ceramic supports such as silica (SiO), alumina (AlO), zeolites and clays. The support material may also comprise of oxides of various metals such as iron, manganese, and calcium. The non-carbon sorbents of the invention can be easily injected into the flue gas and recovered in the Particulate Control Device (PCD) along with the fly ash without altering the properties of the by-product fly ash enabling its use as a cement additive. Sorbent materials of this invention effectively remove both elemental and oxidized forms of mercury from flue gases and can be used at elevated temperatures. The sorbent combines an oxidation catalyst and a sorbent in the same particle to both oxidize the mercury and then immobilize it.

Mercury removal sorbents

The present invention provides a sorbent for the removal of carbon dioxide from gas streams, comprising: a COcapacity of at least 9 weight percent when measured at 22&#xb0; C. and 1 atmosphere; an HO capacity of at most 15 weight percent when measured at 25&#xb0; C. and 1 atmosphere; and an isosteric heat of adsorption of from 5 to 8.5 kilocalories per mole of CO. The invention also provides a carbon sorbent in a powder, a granular or a pellet form for the removal of carbon dioxide from gas streams, comprising: a carbon content of at least 90 weight percent; a nitrogen content of at least 1 weight percent; an oxygen content of at most 3 weight percent; a BET surface area from 50 to 2600 m/g; and a DFT micropore volume from 0.04 to 0.8 cc/g.

High capacity carbon dioxide sorbent

Gas desulfurization sorbents and methods using them for removal of sulfur from gas streams, particularly at high temperatures ranging from 500 to 1000&#xb0; C. The sorbents and methods are of particular application to produce a sulfur-clean feed from reformate gas generated from readily available transportation fuels containing sulfur. Sorbents of the invention can reduce the sulfur concentration in reformate gas to parts per billion on volume basis (ppbv) levels over a large range of temperatures. Sorbent materials of this invention comprise a nickel phase dispersed on a particulate support or a monolith support. The support can be a high surface area support with surface area of 100 m/g or higher. The invention also provides systems for desulfurizing reformate gas and systems for providing a desulfurized gas to a fuel cell, particularly a solid oxide fuel cell.

High temperature gas desulfurization sorbents

Complex metal oxide-containing pellets and their use for producing hydrogen. The complex metal oxide-containing pellets are suitable for use in a fixed bed reactor due to sufficient crush strength. The complex metal oxide-containing pellets comprise one or more complex metal oxides and at least one of in-situ formed calcium titanate and calcium aluminate. calcium titanate and calcium aluminate are formed by reaction of suitable precursors in a mixture with one or more complex metal carbonates. The complex metal oxide-containing pellets optionally comprise at least one precious metal.

Growing community of inventors

Boulder, CO, United States of America

Gokhan Alptekin