| 摘要 |
Herein are described products and processes for the reduction of contaminants from flue gases. A first embodiment is a sorbent composition that includes an aluminosilicate; and a calcium compound selected from calcium oxide, calcium hydroxide, calcium carbonate, calcium halide, PRB coal fly ash, and a mixture thereof. A second embodiment is a process of reducing contaminant concentrations in flue gas, which includes injecting a sorbent composition into a flue gas at a location where the flue gas has a temperature in a range of about 1700° C. to about 400° C.; admixing the sorbent composition and a contaminant to form a eutectic composition; and collecting the eutectic composition at a temperature in a range of about 400° C. and about 50° C. A third embodiment, where a combination of anti-eutectic and non-eutectic materials are combined physically in a sorbent particle that captures a multiple set of different metal types preventing the capture of one metal contaminant or nuisance metal (such as Na or K) from interfering with the capture of another metal or other metal contaminants. |
| 主权项 |
1. A sorbent composition consisting essentially of:
an aluminosilicate selected from the group consisting of andalusite, kyanaite, sillimanite, kaolinite, metakaolinite, mullite, and a mixture thereof; and a calcium carbonate; wherein the sorbent composition is ante-eutectic in a temperature range of about 1700° C. to about 400° C. for selenium, arsenic, phosphorous, or a transition metal selected from the group consisting of cadmium, cobalt, lead, chromium, copper, nickel, zinc, and a mixture thereof. |
