Process and system for the abatement of impurities from a gas stream
A process for the abatement of carbonyl sulphide, carbon disulphide, metal carbonyl compounds, hydrogen sulphide and hydrogen cyanide, ammonia and arsenic and chlorine compounds from a feed gas comprising the steps of contacting the gas in succession with a first purification agent comprising activated carbon, with a second purification agent comprising alumina, with a third purification agent comprising zinc oxide, with a fourth purification agent comprising a zeolitic material and a fifth purification agent comprising zinc oxide and copper oxide.
1. A process for the abatement of carbonyl sulphide, carbon disulphide, metal carbonyl compounds, hydrogen sulphide and hydrogen cyanide, ammonia and arsenic and chlorine compounds from a feed gas comprising the steps of contacting the gas in succession with a first purification agent comprising activated carbon, with a second purification agent comprising alumina, with a third purification agent comprising zinc oxide, with a fourth purification agent comprising a zeolitic material and a fifth purification agent comprising zinc oxide and copper oxide.
2. The process of claim 1 , wherein the second purification agent further comprises a potassium carbonate.
3. The process of claim 1 , wherein the third purification agent further comprises alumina.
4. The process of claim 1 , wherein the fourth purification agent consists of an acidic zeolite.
5. The process of claim 1 , wherein the fifth purification agent further comprises alumina.
6. The process according to claim 1 , further comprising a washing step with a chemical or physical solvent prior to contacting the gas with the first purification agent.
7. A system for the abatement of contaminants from synthesis gas comprising in succession a first bed with a purification agent comprising activated carbon, a second bed with a purification agent comprising alumina, a third bed with a purification agent comprising zinc oxide, a fourth bed with a purification agent comprising a zeolitic material and a fifth bed with purification agent comprising zinc oxide and copper oxide.
8. The system of claim 7 , wherein the second purification agent further comprises a potassium carbonate.
9. The system of claim 7 , wherein the third purification agent further comprises alumina.
10. The system of claim 7 , wherein the fourth purification agent consists of an acidic zeolite.
11. The system of claim 7 , wherein the fifth purification agent further comprises alumina.
12. The system according to claim 7 , wherein at least the first third and fourth bed each are arranged in two parallel beds.