Method and device for separating hydrogen sulfide and hydrogen production system using the same
The system includes adsorbent-packed towers 11 and 21 filled with H 2 S adsorbent which triethanolamine is supported by activated carbon. Mixed gas derived from a synthesis gas containing CO 2 and H 2 S at about 40° C. is supplied to the adsorbent-packed towers 11 and 21 through a line. Valves 12 and 13 are opened, valves 22 and 23 are closed, valves 14 and 15 are closed, and valves 24 and 25 are opened to perform adsorption of H 2 S contained in the gas to be treated in the adsorbent-packed tower 11 in a dry state and to perform desorption of H 2 S in the adsorbent-packed tower 21 . When adsorption of H 2 S contained in the gas to be treated is performed in the adsorbent-packed tower 21 and desorption of H 2 S is performed in the adsorbent-packed tower 11 , the valves 12, 13, 24 , and 25 are closed and the valves 22, 23, 14 , and 15 are opened.
1. A system for producing hydrogen from a raw material gas that is a gas to be treated containing hydrogen sulfide, carbon dioxide, and hydrogen, the system comprising:
a hydrogen sulfide separation device
a carbon dioxide separation device that is provided downstream of the hydrogen sulfide separation device to separate carbon dioxide from a gas obtained by removing hydrogen sulfide from the raw material gas; and
a hydrogen purification device that is provided downstream of the carbon dioxide separation device to separate hydrogen from a gas obtained by removing hydrogen sulfide and carbon dioxide from the raw material gas:
wherein the hydrogen sulfide separation device is a device for selectively separating hydrogen sulfide from a gas to be treated containing hydrogen sulfide and carbon dioxide using a hydrogen sulfide adsorbent in which an amine compound is supported by a porous material, the device comprising:
an adsorbent-packed tower filled with the hydrogen sulfide adsorbent;
means for supplying the gas to be treated to the adsorbent-packed tower to bring the hydrogen sulfide adsorbent and the gas to be treated into contact with each other; and
means for supplying a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent after adsorption of hydrogen sulfide to the adsorbent-packed tower,
wherein the amine compound is a tertiary amine, and the contact between the hydrogen sulfide adsorbent and the gas to be treated in the adsorbent-packed tower is made in a dry state.
2. A system for producing hydrogen from a raw material gas that is a gas to be treated containing hydrogen sulfide, carbon dioxide, and hydrogen, the system comprising:
a hydrogen sulfide separation device
a carbon dioxide separation device that is provided downstream of the hydrogen sulfide separation device to separate carbon dioxide from a gas obtained by removing hydrogen sulfide from the raw material gas; and
a hydrogen purification device that is provided downstream of the carbon dioxide separation device to separate hydrogen from a gas obtained by removing hydrogen sulfide and carbon dioxide from the raw material gas:
wherein the hydrogen sulfide separation device is a device for selectively separating hydrogen sulfide from a gas to be treated containing hydrogen sulfide and carbon dioxide using a hydrogen sulfide adsorbent in which an amine compound is supported by a porous material, the device comprising:
a plurality of adsorbent-packed towers filled with the hydrogen sulfide adsorbent;
a plurality of means for supplying the gas to be treated to the adsorbent-packed towers, respectively, to bring the hydrogen sulfide adsorbent and the gas to be treated into contact with each other; and
a plurality of means for supplying a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent after adsorption of hydrogen sulfide to the adsorbent-packed towers, respectively,
wherein the amine compound is a tertiary amine, and the contact between the hydrogen sulfide adsorbent and the gas to be treated in each of the adsorbent-packed towers is made in a dry state, and
wherein the gas to be treated is supplied from the gas supplying means to one or more of the adsorbent-packed towers, respectively, to selectively adsorb hydrogen sulfide, and the heated gas flow is supplied from the heated gas flow supplying means to another of the adsorbent-packed towers or one or more of the other adsorbent-packed towers, respectively, to desorb hydrogen sulfide.
3. The hydrogen production system according to claim 1 , wherein the hydrogen sulfide separation device and the carbon dioxide separation device are provided on a high-pressure gas treatment line.
4. The hydrogen production system according to claim 2 , wherein the hydrogen sulfide separation device and the carbon dioxide separation device are provided on a high-pressure gas treatment line.
5. A system for producing hydrogen from a raw material gas that is a gas to be treated containing hydrogen sulfide, carbon dioxide, and hydrogen, the system comprising:
a carbon dioxide separation device that separates hydrogen sulfide and carbon dioxide from the raw material gas;
a hydrogen purification device that is provided downstream of the carbon dioxide separation device to separate hydrogen from a gas obtained by removing hydrogen sulfide and carbon dioxide from the raw material gas; and
a hydrogen sulfide separation device:
wherein the hydrogen sulfide separating device is a device for selectively separating hydrogen sulfide from a gas to be treated containing hydrogen sulfide and carbon dioxide using a hydrogen sulfide adsorbent in which an amine compound is supported by a porous material, the device comprising:
an adsorbent packed tower filled with the hydrogen sulfide adsorbent;
means for supplying the gas to be treated to the adsorbent packed tower to bring the hydrogen sulfide adsorbent and the gas to be treated into contact with each other; and
means for supplying a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent after adsorption of hydrogen sulfide to the adsorbent-packed tower,
wherein the amine compound is a tertiary amine, and the contact between the hydrogen sulfide adsorbent and the gas to be treated in the adsorbent-packed tower is made in a dry state.
6. A system for producing hydrogen from a raw material gas that is a gas to be treated containing hydrogen sulfide, carbon dioxide, and hydrogen, the system comprising:
a carbon dioxide separation device that separates hydrogen sulfide and carbon dioxide from the raw material gas;
a hydrogen purification device that is provided downstream of the carbon dioxide separation device to separate hydrogen from a gas obtained by removing hydrogen sulfide and carbon dioxide from the raw material gas; and
a hydrogen sulfide separation device:
wherein the hydrogen sulfide separation device is a device for selectively separating hydrogen sulfide from a gas to be treated containing hydrogen sulfide and carbon dioxide using a hydrogen sulfide adsorbent in which an amine compound is supported by porous material, the device comprising:
a plurality of adsorbent-packed towers filled with the hydrogen sulfide adsorbent;
a plurality of means for supplying the gas to be treated to the adsorbent-packed towers, respectively, to bring the hydrogen sulfide adsorbent and the gas to be treated into contact with each other; and
a plurality of means for supplying a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent after adsorption of hydrogen sulfide to the adsorbent-packed towers, respectively,
wherein the amine compound is a tertiary amine, and the contact between the hydrogen sulfide adsorbent and the gas to be treated in each of the adsorbent-packed towers is made in a dry state, and
wherein the gas to be treated is supplied from the gas supplying means to one or more of the adsorbent-packed towers, respectively, to selectively adsorb hydrogen sulfide, and the heated gas flow is supplied from the heated gas flow supplying means to another of the adsorbent-packed towers or one or more of the other adsorbent-packed towers, respectively, to desorb hydrogen sulfide.
7. The hydrogen production system according to claim 5 , wherein the carbon dioxide separation device is provided on a high-pressure gas treatment line and the hydrogen sulfide separation device is provided on an ordinary-pressure gas treatment line.
8. The hydrogen production system according to claim 6 , wherein the carbon dioxide separation device is provided on a high-pressure gas treatment line and the hydrogen sulfide separation device is provided on an ordinary-pressure gas treatment line.
9. The hydrogen production system according to claim 1 , wherein the carbon dioxide separation device separates carbon dioxide using a carbon dioxide adsorbent in which an amine compound is supported by a porous material.
10. The hydrogen production system according to claim 2 , wherein the carbon dioxide separation device separates carbon dioxide using a carbon dioxide adsorbent in which an amine compound is supported by a porous material.
11. The hydrogen production system according to claim 1 , wherein combustible off-gas after separation of hydrogen by the hydrogen purification device is used to generate a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent in the hydrogen sulfide separation device.
12. The hydrogen production system according to claim 2 , wherein combustible off-gas after separation of hydrogen by the hydrogen purification device is used to generate a heated gas flow for desorbing hydrogen sulfide from the hydrogen sulfide adsorbent in the hydrogen sulfide separation device.
13. The hydrogen production system according to claim 9 , wherein combustible off-gas after separation of hydrogen by the hydrogen purification device is used to generate a heated gas flow for desorbing carbon dioxide from the carbon dioxide adsorbent in the carbon dioxide separation device.
14. The hydrogen production system according to claim 10 , wherein combustible off-gas after separation of hydrogen by the hydrogen purification device is used to generate a heated gas flow for desorbing carbon dioxide from the carbon dioxide adsorbent in the carbon dioxide separation device.
15. The hydrogen production system according to claim 7 , comprising a carbon dioxide recovery device for recovering finally-separated carbon dioxide.
16. The hydrogen production system according to claim 2 , comprising a carbon dioxide recovery device for recovering finally-separated carbon dioxide.
17. The hydrogen production system according to claim 1 , wherein the tertiary amine is a tertiary alkanolamine.
18. The hydrogen production system according to claim 2 , wherein the tertiary amine is a tertiary alkanolamine.
19. The hydrogen production system according to claim 5 , wherein the tertiary amine is a tertiary alkanolamine.
20. The hydrogen production system according to claim 6 , wherein the tertiary amine is a tertiary alkanolamine.