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A sealing agent for ion transport membranes (ITMs) includes a composition having a glass powder and a ceramic powder. The ceramic powder can include Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) or La2NiO4+δ (LNO). The ceramic powder can be identical to the ceramic powder from which the ITM is made. The glass powder can include PYREX glass. The sealing agent can be in the form of a paste. The sealing agent can be used to attach an ion transport membrane to one or more support tubes. The sealing agent includes from about 10 wt. % to about 40 wt. % glass powder and from about 60 wt. % to about 90% wt. % (BSCF) ceramic powder.

Titel:	Sealing agent for ion transport membranes
Autor/in / Beteiligte Person:	KING FAHD UNIVERSITY OF PETROLEUM AND, MINERALS
Link:	View record in USPTO Patent Grants (Volltext)
Veröffentlichung:	2017
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Grants Sprachen: English Patent Number: 9,834,471 Publication Date: December 05, 2017 Appl. No: 14/944207 Application Filed: November 17, 2015 Assignees: King Fahd University of Petroleum and Minerals (Dhahran, SA) Claim: 1. A sealing agent for ion transport membranes comprising: a composition including about 10 wt. % to about 40 wt. % glass powder and about 60 wt. % to about 90% wt. % ceramic powder, the ceramic powder including at least one of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) and La 2 NiO 4+δ (LNO). Claim: 2. The sealing agent for ion transport membranes according to claim 1 , wherein the composition is a paste. Claim: 3. The sealing agent for ion transport membranes according to claim 1 , wherein the glass powder has a composition including 4.0% boron, 54.0% oxygen, 2.8% sodium, 1.1% aluminum, 37.7% silicon, and 0.3% potassium composition. Claim: 4. The sealing agent for ion transport membranes according to claim 1 , wherein the composition includes about 20 wt. % glass powder. Claim: 5. The sealing agent for ion transport membranes according to claim 1 , wherein the composition includes about 80 wt. % ceramic powder. Claim: 6. A method of preparing a sealing agent for ion transport membranes comprising the steps of: providing glass pieces; milling the glass pieces to obtain glass powder; mixing the glass powder with ceramic powder to form a mixture, the ceramic powder including at least one of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) and La 2 NiO 4+δ (LNO); and adding water to the mixture to form a paste. Claim: 7. The method of preparing a sealing agent for ion transport membranes according to claim 6 , wherein the ceramic powder is prepared by first preparing a gel using a sol-gel process, calcining the resulting gel at 250° C. for 30 minutes to obtain a powder, heating the powder at 1000° C. for 10 hours, and milling the powder for 24 hours. Claim: 8. The method of preparing a sealing agent for ion transport membranes according to claim 6 , wherein the step of milling the glass pieces comprises is ball milling the glass pieces, the ball milling of the glass pieces being conducted in an alumina jar mill with alumina balls. Claim: 9. The method of preparing a sealing agent for ion transport membranes according claim 6 , wherein the mixture includes about 20 wt. % glass powder and about 80 wt. % ceramic powder. Claim: 10. The method of preparing a sealing agent for ion transport membranes according to claim 6 , wherein the glass powder and the ceramic powder are less than 1 micron in diameter. Claim: 11. A gas separation system comprising: (a) an ion transport membrane, the ion transport membrane including a ceramic material; (b) a sealing agent including about 10 wt. % to about 40 wt. % glass powder and about 60 wt. % to about 90 wt. % ceramic powder, the ceramic powder being identical to the ceramic material of the ion transport membrane, the ceramic powder of the sealing agent including at least one of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) and La 2 NiO 4+δ (LNO); and (c) one or more support tubes secured to the ion transport membrane and the sealing agent. Claim: 12. The gas separation system according to claim 11 , wherein the sealing agent comprises about 20 wt. % glass powder. Claim: 13. The gas separation system according to claim 11 , wherein the sealing agent comprises about 80 wt. % ceramic powder. Patent References Cited: 3397790 August 1968 Navoy ; 5584997 December 1996 Yagihashi ; 9725662 August 2017 Kriegel ; 2003/0026848 February 2003 Joshi ; 2003/0230363 December 2003 Sturgill ; 2005/0011358 January 2005 Yamada ; 2007/0184324 August 2007 Lyons ; 2008/0011604 January 2008 Stevens ; 2010/0320871 December 2010 Suenaga ; 2011/0109704 May 2011 Furuya ; 2011/0318403 December 2011 Raskin ; 2012/0135331 May 2012 Rosseinsky ; 2012/0288746 November 2012 Abe ; 2013/0310780 November 2013 Phillips ; 2014/0201985 July 2014 Fujita ; 2015/0145926 May 2015 Yonemura ; 2016/0040081 February 2016 Kriegel ; 2016/0136571 May 2016 Kriegel Other References: Kim et al. “Polarization and stability of La2NiO4+δ in comparison with La0.6Sr0.4Co0.2Fe0.8O3-δ as air electrode of solid” international journal of hydrogen energy, Jun. 2016. cited by examiner ; Dahl et al. “Fabrication, sealing and high pressure testing of tubular La2NiO4+δ membranes for air separation” Energy Procedia vol. 23, 2012, pp. 187-196. cited by examiner ; Qi et al., “Ceramic Glass Composite High Temperature Seals for Dense Ionic-Conducting Ceramic Membranes”, J. of Membrane Science 2001, 93, 105-193. cited by applicant Primary Examiner: Shumate, Anthony Attorney, Agent or Firm: Oblon, McClelland, Maier & Neustadt, L.L.P.

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Sealing agent for ion transport membranes