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Title: Membranes for separation of carbon dioxide

Patent ·
OSTI ID:1016558
 [1];  [2];  [3];  [4];  [3]
  1. Rexford, NY
  2. Delmar, NY
  3. Niskayuna, NY
  4. Latham, NY
+ Show Author Affiliations

Methods for separating carbon dioxide from a fluid stream at a temperature higher than about 200.degree. C. with selectivity higher than Knudsen diffusion selectivity include contacting a porous membrane with the fluid stream to preferentially transport carbon dioxide. The porous membrane includes a porous support and a continuous porous separation layer disposed on a surface of the porous support and extending between the fluid stream and the porous support layer. The porous support comprises alumina, silica, zirconia, stabilized zirconia, stainless steel, titanium, nickel-based alloys, aluminum-based alloys, zirconium-based alloys or a combination thereof. Median pore size of the porous separation layer is less than about 10 nm, and the porous separation layer comprises titania, MgO, CaO, SrO, BaO, La.sub.2O.sub.3, CeO.sub.2, HfO.sub.2, Y.sub.2O.sub.3, VO.sub.z, NbO.sub.z, TaO.sub.z, ATiO.sub.3, AZrO.sub.3, AAl.sub.2O.sub.4, A.sup.1FeO.sub.3, A.sup.1MnO.sub.3, A.sup.1CoO.sub.3, A.sup.1NiO.sub.3, A.sup.2HfO.sub.3, A.sup.3 CeO.sub.3, Li.sub.2ZrO.sub.3, Li.sub.2SiO.sub.3, Li.sub.2TiO.sub.3, Li.sub.2HfO.sub.3, A.sup.4N.sup.1.sub.yO.sub.z, Y.sub.xN.sup.1.sub.yO.sub.z, La.sub.xN.sup.1.sub.yO.sub.z, HfN.sup.2.sub.yO.sub.z, or a combination thereof; wherein A is La, Mg, Ca, Sr or Ba; A.sup.1 is La, Ca, Sr or Ba; A.sup.2 is Ca, Sr or Ba; A.sup.3 is Sr or Ba; A.sup.4 is Mg, Ca, Sr, Ba, Ti or Zr; N.sup.1 is V, Nb, Ta, Cr, Mo, W, Mn, Si or Ge; N.sup.2 is V, Mo, W or Si; x is 1 or 2; y ranges from 1 to 3; and z ranges from 2 to 7.

Research Organization:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC26-05NT42451
Assignee:
General Electric Company (Niskayuna, NY)
Patent Number(s):
7,896,949
Application Number:
US Patent Application 12/107,148
OSTI ID:
1016558
Country of Publication:
United States
Language:
English

References (4)

Effect of added basic metal oxides on CO2 adsorption on alumina at elevated temperatures journal February 1998
A study by in situ techniques of the thermal evolution of the structure of a Mg–Al–CO3 layered double hydroxide journal August 2002
A Microporous Titania Membrane for Nanofiltration and Pervaporation journal September 2004
An Estimate of Surface Mobility of CO2on γ-Alumina and MgO-Modified γ-Alumina Above 500 K journal August 1998

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