Silicide compositions containing alkali metals and methods of making the same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01B-033/06
B01J-021/00
출원번호
US-0854510
(2010-08-11)
등록번호
US-8372371
(2013-02-12)
발명자
/ 주소
Lefenfeld, Michael
Dye, James L.
출원인 / 주소
Signa Chemistry, Inc.
인용정보
피인용 횟수 :
7인용 특허 :
59
초록▼
The invention relates to a method of making alkali metal silicide compositions, and the compositions resulting from the method, comprising mixing an alkali metal with silicon and heating the resulting mixture to a temperature below about 475° C. The resulting compositions do not react with dry O2. A
The invention relates to a method of making alkali metal silicide compositions, and the compositions resulting from the method, comprising mixing an alkali metal with silicon and heating the resulting mixture to a temperature below about 475° C. The resulting compositions do not react with dry O2. Also, the invention relates to sodium silicide compositions having a powder X-ray diffraction pattern comprising at least three peaks with 2Theta angles selected from about 18.2, 28.5, 29.5, 33.7, 41.2, 47.4, and 56.2 and a solid state 23Na MAS NMR spectra peak at about 18 ppm. Moreover, the invention relates to methods of removing a volatile or flammable substance in a controlled manner. Furthermore, the alkali metal silicide compositions of the invention react with water to produce hydrogen gas.
대표청구항▼
1. A hydrogen generator in a fuel cell system in which hydrogen is generated by the reaction of a hydrogen fuel material and water in the hydrogen generator, the improvement wherein the hydrogen fuel material comprises an alkali metal silicide composition. 2. The hydrogen generator of claim 1, where
1. A hydrogen generator in a fuel cell system in which hydrogen is generated by the reaction of a hydrogen fuel material and water in the hydrogen generator, the improvement wherein the hydrogen fuel material comprises an alkali metal silicide composition. 2. The hydrogen generator of claim 1, wherein the alkali metal silicide composition comprises the product of: mixing an alkali metal with powdered silicon in an inert atmosphere and heating the resulting mixture to a temperature below about 475° C.,wherein the alkali metal silicide composition is stable in dry air. 3. The hydrogen generator of claim 1, wherein the alkali metal silicide composition is a sodium silicide or a potassium silicide. 4. The hydrogen generator of claim 1, wherein the alkali metal silicide composition comprises Na4Si4 or K4Si4. 5. A hydrogen generator in a fuel cell system in which hydrogen is generated by the reaction of a hydrogen fuel material and water in the hydrogen generator, the improvement wherein the hydrogen fuel material comprises an air stable sodium silicide composition having a powder X-ray diffraction pattern comprising peaks at 2Theta angles of about 18.2 and about 41.2 and at least one peak with a 2Theta angle selected from about 28.5, 29.5, 33.7, 47.4, and 56.2. 6. A hydrogen generator in a fuel cell system in which hydrogen is generated by the reaction of a hydrogen fuel material and water in the hydrogen generator, the improvement wherein the hydrogen fuel material comprises an air stable sodium silicide composition having a single peak in the solid state 23Na MAS NMR spectra at about 18 ppm. 7. A method for producing hydrogen gas comprising the step of contacting an alkali metal silicide composition with water, wherein the contacting step comprises contacting the alkali metal silicide composition contained within a hydrogen generator in a fuel cell system with water. 8. The method of claim 7wherein the alkali metal silicide composition comprises the product of: mixing an alkali metal with powdered silicon in an inert atmosphere and heating the resulting mixture to a temperature below about 475° C.,wherein the alkali metal silicide composition is stable in dry air. 9. The method of claim 7, wherein the alkali metal silicide composition is a sodium silicide or a potassium silicide. 10. The method of claim 9, wherein the alkali metal silicide composition comprises Na4Si4 or K4Si4. 11. The method of claim 7, wherein the hydrogen gas is generated during said contacting step. 12. A method for producing hydrogen gas comprising the step of contacting an air stable sodium silicide composition having a powder X-ray diffraction pattern comprising peaks at 2Theta angles of about 18.2 and about 41.2 and at least one peak with a 2Theta angle selected from about 28.5, 29.5, 33.7, 47.4, and 56.2 with water, wherein the contacting step comprises contacting the sodium silicide composition contained within a hydrogen generator in a fuel cell system with water. 13. The method of claim 12, wherein the hydrogen gas is generated during said contacting step. 14. A method for producing hydrogen gas comprising the step of contacting an air stable sodium silicide composition having a single peak in the solid state 23NaMAS NMR spectra at about 18 ppm with water, wherein the contacting step comprises contacting the sodium silicide composition contained within a hydrogen generator in a fuel cell system with water. 15. The method of claim 14, wherein the hydrogen gas is generated during said contacting step.
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