Highly attrition resistant and dry regenerable sorbents for carbon dioxide capture

• US 7,820,591 B2
• Filed: 01/04/2005
• Issued: 10/26/2010
• Est. Priority Date: 01/04/2005
• Status: Active Grant

• Current Assignee: Korea Electric Power Corporation (Government of South Korea), Korea Midland Power Company Limited (Government of South Korea), Korea South-East Power Co., Ltd. (Government of South Korea), Korea Western Power Company Limited (Government of South Korea), Korea South Power Company Limited
• Original Assignee: Korea East-West Power Co., Ltd. (Government of South Korea), Korea Electric Power Corporation (Government of South Korea), Korea Midland Power Company Limited (Government of South Korea), Korea South-East Power Co., Ltd. (Government of South Korea), Korea Western Power Company Limited (Government of South Korea), Korea South Power Company Limited
• Inventors: Ryu, Chong-Kul, Oh, Je-Myung, Eom, Tae-Hyoung, Lee, Joong-Beom
• Primary Examiner(s): Vanoy; Timothy C
• Assistant Examiner(s): Liao; Diana J
• Application Number:
  US11/029,038
• Publication Number:
  US 20060148642A1
• Time in Patent Office: 2,121 Days
• Field of Search: 502/84, 502/400, 423/212, 423/230, 423/215.5, 423/421, 423/427, 951/39
• US Class Current: 502/400
• CPC Class Codes: B01D 2253/10 Inorganic adsorbents
• CPC Class Codes: B01D 2253/304 Linear dimensions, e.g. particle shape, diameter
• CPC Class Codes: B01D 2253/306 Surface area, e.g. BET-specific surface
• CPC Class Codes: B01D 2253/311 Porosity, e.g. pore volume
• CPC Class Codes: B01D 2257/504 Carbon dioxide
• CPC Class Codes: B01D 2259/40088 by heating
• CPC Class Codes: B01D 53/12 according to the "fluidised technique"
• CPC Class Codes: B01J 20/043 Carbonates or bicarbonates, e.g. limestone, dolomite, aragonite
• CPC Class Codes: B01J 20/06 comprising oxides or hydroxides of metals not provided for in group B01J20/04
• CPC Class Codes: B01J 20/08 comprising aluminium oxide or hydroxide; comprising bauxite
• CPC Class Codes: B01J 20/14 Diatomaceous earth
• CPC Class Codes: B01J 20/18 Synthetic zeolitic molecular sieves
• CPC Class Codes: B01J 20/28004 Sorbent size or size distribution, e.g. particle size
• CPC Class Codes: B01J 20/28011 Other properties, e.g. density, crush strength
• CPC Class Codes: B01J 20/28014 characterised by their form
• CPC Class Codes: B01J 20/28019 Spherical, ellipsoidal or cylindrical
• CPC Class Codes: B01J 20/2803 Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products
• CPC Class Codes: B01J 20/28042 Shaped bodies; Monolithic structures
• CPC Class Codes: B01J 20/28045 Honeycomb or cellular structures; Solid foams or sponges
• CPC Class Codes: B01J 20/28057 Surface area, e.g. B.E.T specific surface area
• CPC Class Codes: B01J 20/28059 : being less than 100 m2/g
• CPC Class Codes: B01J 20/28069 : Pore volume, e.g. total pore volume, mesopore volume, micropore volume
• CPC Class Codes: B01J 20/3021 : Milling, crushing or grinding
• CPC Class Codes: B01J 20/3042 : Use of binding agents; addition of materials ameliorating the mechanical properties of the produced sorbent
• CPC Class Codes: B01J 20/3078 : Thermal treatment, e.g. calcining or pyrolizing
• CPC Class Codes: B01J 20/3433 : of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425
• CPC Class Codes: B01J 20/3483 : by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
• CPC Class Codes: B01J 2220/56 : Use in the form of a bed
• CPC Class Codes: B82Y 30/00 : Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: Y02C 20/40 : of CO2
• CPC Class Codes: Y10S 502/514 : Process applicable either to preparing or to regenerating or to rehabilitating catalyst or sorbent

Abstract

Disclosed herein is a dry regenerable sorbent for carbon dioxide capture from flue gas produced by fossil fuel-fired power plants including industrial boilers before being released to atmosphere or from fuel gas stream such as syngas produced by conversion of fossil fuel (e.g. gasification), by dry regenerable sorbent technology. The dry regenerable sorbent comprises: 70 wt % or less of an active component selected from solid compounds capable of being converted to metal carbonates; 70 wt % or less of a support selected from solid porous non-metallic materials capable of imparting a required specific surface area to the sorbent; and 70 wt % or less of an inorganic binder selected from cement-like, clay-like, and ceramic-like binders capable of imparting mechanical strength to the sorbent, the total weight of the solid raw materials being 100 wt %.

Claims

1. A dry regenerable sorbent for carbon dioxide capture from flue gas produced by fossil fuel-fired power plants including industrial boilers before being released to atmosphere or from fuel gas stream such as syngas produced by conversion of fossil fuel (e.g. gasification), by dry regenerable sorbent technology,

wherein the sorbent comprises:

solid raw materials comprising;

10˜

60 wt % of an active component selected from carbonates or bicarbonates of sodium or potassium;

15˜

40 wt % of a support selected from solid porous non-metallic materials hydrophilic and capable of imparting a required specific surface area to the sorbent; and

10˜

60 wt % of an inorganic binder selected from cement-like, clay-like, and ceramic-like binders capable imparting mechanical strength to the sorbent,

wherein the total weight of the solid raw materials being 100 wt %, and

wherein the purity of active component is 98% or higher, and

wherein the sorbent has a spherical shape, a specific surface area of 50 m²/g or more, and a porosity of 30% or more, bulk density of 0.4 g/ml or more, a carbon dioxide sorption capacity of 3% or more, a utilization efficiency of 7% or more, an attrition index (AI) of 90% or less, an average particle size of 60˜

160 μ

m, and a particle size distribution of 40˜

300 μ

m, and

wherein the sorbent is used to capture and separate carbon dioxide in a fluidized-bed or transport absorber and a fluidized-bed or transport regenerator at a temperature range of 40˜

200°

C.

2. The dry regenerable sorbent according to claim 1, wherein the support is at least one material selected from ceramic-like supports, including alumina, silica, magnesia, zirconia and titania, natural and synthesized zeolites, diatomaceous earth, and carbon molecular sieves (carbon nanotubes).

3. The dry regenerable sorbent according to claim 1, wherein the inorganic binder is a cement-like, a clay-like or a ceramic-like binder, and is at least one binder selected from these binders.

4. The dry regenerable sorbent according to claim 3, wherein the cement binder is hydraulic cement, and is at least one material selected from calcium silicate (Portland cement), calcium aluminate cements, and gypsum (CaSO₄.2H₂O);

the clay-like binder is at least one material selected from bentonite, attapulgite (palygorskite) and sepiolite belonging to smectites, and kaolin belonging to kandites; and

the ceramic-like binder is at least one material selected from ceramics, such as alumina, silica, zirconia, titania and magnesia, ceramic sols, and pseudo-boehmite.