Gas purification apparatus and gas purification method
US-9845438-B2 · Dec 19, 2017 · US
Method for recovering hydrogen from hydrogen sulfide
US9364789B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9364789-B2 |
| Application number | US-201314428053-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 15, 2013 |
| Priority date | Aug 21, 2012 |
| Publication date | Jun 14, 2016 |
| Grant date | Jun 14, 2016 |
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Abstract
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The present invention provides a method for recovering hydrogen from hydrogen sulfide using a supported silver catalyst, and a method for purifying a gas stream containing hydrogen sulfide using such a catalyst.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for recovering hydrogen from hydrogen sulfide, said method comprising the steps of: a. reacting hydrogen sulfide with supported silver at a temperature of at least 200° C., whereby the silver is converted to silver sulfide and hydrogen is released; and b. subjecting the silver sulfide to mild oxidation carried out using gaseous oxygen at a temperature below 450° C., whereby the silver sulfide is converted to silver and sulfur dioxide. 2. A method for purifying a gas stream containing hydrogen sulfide, said method comprising the steps of: passing said gas stream over a bed of supported silver at a temperature of at least 200° C., so that the hydrogen sulfide in the gas stream reacts with said silver, whereby the silver is converted to silver sulfide and hydrogen is released; and subjecting the silver sulfide to mild oxidation carried out using gaseous oxygen at a temperature below 450° C., whereby the silver sulfide is converted to silver and sulfur dioxide. 3. The method according to claim 1 , wherein the silver content of the supported silver is 5-10 wt %. 4. The method according to claim 1 , wherein the support material has a surface area between 1-200 m 2 /g and/or a porosity from 0.2-0.5 cm 3 /g. 5. The method according to claim 1 , wherein the support material has a particle size of between 1-10 mm in diameter. 6. The method according to claim 1 , wherein mild oxidation is carried out using atmospheric air dilute in oxygen. 7. The method according to claim 1 , wherein step b. takes place at a temperature between 200 and 400° C. 8. The method according to claim 1 , wherein the method takes place during gasification of hydrocarbon fuels to synthesis gas. 9. The method according to claim 1 , wherein steps a and b take place immediately after one another in a continuous process. 10. The method according to claim 1 , wherein step a. occurs at a temperature of between 250-500° C. 11. The method according to claim 1 , wherein step a. occurs at a temperature of between 300-450° C. 12. The method according to claim 6 , wherein the atmospheric air dilute in oxygen is 0.5-5% vol.
Assignees
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Classifications
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Titanium · CPC title
- B01D53/8612Primary
Hydrogen sulfide · CPC title
Silver · CPC title
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Frequently asked questions
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- What does patent US9364789B2 cover?
- The present invention provides a method for recovering hydrogen from hydrogen sulfide using a supported silver catalyst, and a method for purifying a gas stream containing hydrogen sulfide using such a catalyst.
- Who is the assignee on this patent?
- Haldor Topsoe As, Haldor Topsoe As
- What technology area does this patent fall under?
- Primary CPC classification B01D53/8612. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jun 14 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).