Title: Core-in-shell sorbent for hot coal gas desulfurization

Abstract

A core-in-shell sorbent is described herein. The core is reactive to the compounds of interest, and is preferably calcium-based, such as limestone for hot gas desulfurization. The shell is a porous protective layer, preferably inert, which allows the reactive core to remove the desired compounds while maintaining the desired physical characteristics to withstand the conditions of use.

Inventors:

Wheelock, Thomas D.; Akiti, Jr., Tetteh T.

Issue Date:

2004-02-10

Research Org.:

Iowa State Univ., Ames, IA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1174723

Patent Number(s):

6689714

Application Number:

09/492,516

Assignee:

Iowa State University Research Foundation, Inc. (Ames, IA)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

B01D53/48 - Sulfur compounds
B01D53/52 - Hydrogen sulfide

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J20/041 - {Oxides or hydroxides}
B01J20/06 - comprising oxides or hydroxides of metals not provided for in group B01J20/04
B01J20/28019 - {Spherical, ellipsoidal or cylindrical}
B01J20/28054 - {characterised by their surface properties or porosity}
B01J20/3007 - {Moulding, shaping or extruding}
B01J20/305 - {Addition of material, later completely removed, e.g. as result of heat treatment, leaching or washing, e.g. for forming pores}
B01J20/3078 - {Thermal treatment, e.g. calcining or pyrolizing}
B01J20/3204 - {Inorganic carriers, supports or substrates}
B01J20/3236 - {containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts}
B01J20/3293 - {Coatings on a core, the core being particle or fiber shaped, e.g. encapsulated particles, coated fibers}

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DOE Contract Number:  

FG22-96PC96203

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

01 COAL, LIGNITE, AND PEAT