Patent ID: 8069797
Filing Date: 2011-12-06
Classification: B01D,B01J,F23J

Abstract:
1. A method for removing mercury from the products of fuel conversion comprising: injecting activated carbon into contact with the products of fuel conversion at a contact location having a temperature between 400° F. and 1100° F., whereupon the activated carbon adsorbs mercury; and removing the activated carbon having mercury adsorbed thereon at a collection location, wherein a temperature at the collection location is configured in correspondence with the respective contact location temperature such that, during the time at which the activated carbon and the flue gas are in contact with one another while traveling between the contact location and the collection location, an exposure temperature deviation during this time, which is the difference in temperature between the respective temperature at the contact location and the respective temperature at the collection location, is greater than 50° F., whereupon, in correspondence with the respective temperature at the contact location that lies in the range between 400° F. and 1100° F., the respective collection location temperature is a value at least 50° F. less than the respective contact location temperature, and wherein the products of fuel conversion are traveled through an air heater to effect transfer of heat from the products of fuel conversion to an air stream and injecting the activated carbon into contact with the products of fuel conversion at a contact location includes injecting the activated carbon upstream of the flue gas side of the air heater.