초록 ▼

A method of producing and treating synthesis gas in which a biomass-rich material is gasified in a gasifier containing a fluidized bed at a temperature that does not exceed 750° C. to produce a crude synthesis gas product. The crude synthesis gas then is quenched, scrubbed, and then subjected to at

A method of producing and treating synthesis gas in which a biomass-rich material is gasified in a gasifier containing a fluidized bed at a temperature that does not exceed 750° C. to produce a crude synthesis gas product. The crude synthesis gas then is quenched, scrubbed, and then subjected to at least one adsorption step to provide a clean synthesis gas. The clean synthesis gas then may be reformed catalytically to provide a synthesis gas with a desired H2:CO ratio, and/or may be employed in the synthesis of desired chemicals.

대표청구항 ▼

1. A method of producing and treating synthesis gas, comprising: (a) gasifying a biomass rich material in the presence of (i) air, oxygen-enriched air, and/or oxygen and (ii) steam in a gasifier containing a fluidized bed at a temperature that does not exceed 750° C. to produce a crude synthesis gas

1. A method of producing and treating synthesis gas, comprising: (a) gasifying a biomass rich material in the presence of (i) air, oxygen-enriched air, and/or oxygen and (ii) steam in a gasifier containing a fluidized bed at a temperature that does not exceed 750° C. to produce a crude synthesis gas;(b) subjecting said crude synthesis gas to steam reforming in the presence of steam and air, oxygen-enriched air, and/or oxygen at a temperature of from about 750° C. to about 1,000° C.;(c) quenching said crude synthesis gas from step (b);(d) scrubbing said quenched synthesis gas from step (c); and(e) subjecting said scrubbed synthesis gas to at least one adsorption step to provide a clean synthesis gas. 2. The method of claim 1 wherein said biomass-rich material is gasified at a temperature that does not exceed 725° C. 3. The method of claim 2 wherein said biomass-rich material is gasified at a temperature which does not exceed 700° C. 4. The method of claim 1 wherein said biomass-rich material is gasified at a pressure which does not exceed 3 atm. 5. The method of claim 4 wherein said biomass-rich material is gasified at a pressure which does not exceed 1.5 atm. 6. The method of claim 1 wherein said quenching of said crude synthesis gas comprises contacting said crude synthesis gas with alkaline water. 7. The method of claim 1 wherein said steam reforming is effected at a temperature of from about 750° C. to about 850° C. 8. The method of claim 1 wherein said steam reforming is effected in the presence of a catalyst. 9. The method of claim 8 wherein said catalyst comprises NiCr/MgO.La2O3.Al2O3. 10. The method of claim 1 wherein said scrubbing of said synthesis gas is effected at a gas entry temperature of from about 150° C. to about 350° C., and an exit temperature of from about 30° C. to about 90° C. 11. The method of claim 1 wherein said at least one adsorption step comprises passing said synthesis gas through an adsorption column packed with at least one material having a porosity of greater than 40%. 12. The method of claim 1 wherein said scrubbing of said synthesis gas comprises: (i) scrubbing said synthesis gas under alkaline conditions; and(ii) scrubbing said synthesis gas at a pH of from 4 to 7. 13. The method of claim 1 wherein said at least one adsorption step comprises: (i) passing said scrubbed synthesis gas through a reactive adsorption bed comprising calcium oxide or calcium oxide and magnesium oxide; and(ii) passing said scrubbed synthesis gas through a zinc oxide filtration bed. 14. The method of claim 1, and further comprising: (f) subjecting said synthesis gas, subsequent to step (e), to catalytic reforming in the presence of a catalyst. 15. The method of claim 14 wherein said catalyst is NiCr/MgO.La2O3.Al2O3. 16. The method of claim 14 wherein said catalytic reforming is effected at a temperature of from about 750° C. to about 900° C. 17. The method of claim 16 wherein said catalytic reforming is effected at a temperature of from about 750° C. to about 800° C. 18. The method of claim 1 wherein said fluidized bed includes one or more materials selected from the group consisting of alumina, olivine, anthracite, and desulfurized petroleum coke.