초록 ▼

The preparation and use of polysilazane ceramic precursor polymer to make ceramic membranes to purify small molecules, such as hydrogen, for the purpose of isolating the gas and manipulating its potential as an alternative fuel source composition are described. The disclosed materials are composed o

The preparation and use of polysilazane ceramic precursor polymer to make ceramic membranes to purify small molecules, such as hydrogen, for the purpose of isolating the gas and manipulating its potential as an alternative fuel source composition are described. The disclosed materials are composed of an amorphous form of SixNy, derived from a SixNyHz precursor, with channels interlaced throughout the composition. These channels are formed during the release of H2 gas from the SixNyHz material formed when the SixNyHz material is heated.

대표청구항 ▼

1. A method of purifying a hydrogen gas-containing atmosphere comprising providing a hydrogen gas-containing gas,providing a filtration medium comprised of a material comprised of Si and N in a 3:4 ratio,contacting the hydrogen gas-containing gas with the filtration medium,filtering the hydrogen gas

1. A method of purifying a hydrogen gas-containing atmosphere comprising providing a hydrogen gas-containing gas,providing a filtration medium comprised of a material comprised of Si and N in a 3:4 ratio,contacting the hydrogen gas-containing gas with the filtration medium,filtering the hydrogen gas-containing gas through the filtration medium to produce essentially pure hydrogen gas. 2. The method according to claim 1, wherein the material comprised of Si and N in a 3:4 ratio comprises an amorphous, nanoporous ceramic composition. 3. The method according to claim 2, wherein the material comprised of Si and N in a 3:4 ratio is derived from a SixNyHz material by heating the SixNyHz-containing material to a temperature sufficient to remove substantially all of the H present therein. 4. The method according to claim 3, wherein the temperature is less than the temperature sufficient to sinter the SixNyHz-containing material. 5. The method according to claim 3, wherein the temperature is greater than 675 C. 6. The method according to claim 3, wherein channels sized to allow hydrogen gas to pass are formed in the material comprised of Si and N in a 3:4 ratio after heating. 7. A composition comprising an amorphous form of SixNy, derived from a SixNyHz material, with channels interlaced throughout the composition,wherein the channels are formed during the release of H2 gas from the SixNyHz material formed when the SixNyHz material is heated to a first temperature, and x ranges from 2.7 to 3.3, and y ranges from 3.6 to 4.4. 8. The composition according to claim 7, wherein x ranges from 2.85 to 3.15, and y ranges from 3.8 to 4.2. 9. The composition according to claim 7, wherein the first temperature is less than the temperature sufficient to sinter the SixNyHz material. 10. The composition according to claim 7, wherein the temperature is greater than 675 C. 11. The composition according to claim 7, wherein the composition is utilized to filter a gas mixture comprising hydrogen gas. 12. A method of preparing a composition comprising providing a SixNyHz-containing material,heating the SixNyHz-containing material to a first temperature sufficient to remove substantially all of the H present therein,forming an amorphous nanoporous ceramic material comprised of SixNy,wherein x ranges from 2.7 to 3.3, and y ranges from 3.6 to 4.4. 13. The method according to claim 12, wherein x ranges from 2.85 to 3.15, and y ranges from 3.8 to 4.2. 14. The method according to claim 12, wherein the first temperature is less than the temperature sufficient to sinter the SixNyHz-containing material. 15. The method according to claim 12, wherein the temperature is greater than 675 C.