Multi-functional composition of matter for rapid removal of mercury from a flue gas

摘要

A multi-functional composition of matter that is useful for injection into a flue gas stream to rapidly and efficiently remove mercury from the flue gas stream. The multi-functional composition of matter may include a fixed carbon sorbent and minerals, halogens in the form of halide salts, as well as other physical and chemical properties to enhance (1) the oxidation reaction kinetics for the oxidation of mercury species and (2) the mass diffusion kinetics of the mercury species.

主权项

1. A multi-functional composition of matter, comprising at least about 20 wt. % and not greater than about 75 wt. % fixed carbon, at least about 20 wt. % and not greater than about 50 wt. % minerals, at least about 1 wt. % and not greater than about 15 wt. % of a halogen, and at least about 3 wt. % and not greater than about 12 wt. % aqueous-based solubilizing medium, wherein:
the multi-functional composition of matter has a median particle size of not greater than about 15 micron; the multi-functional composition of matter has a sum of micropore volume plus mesopore volume that is at least about 0.2 cc/g; and the ratio of micropore volume to mesopore volume is at least about 0.7 and is not greater than about 1.5, and wherein the minerals comprise at least about 1 wt. % iron-containing minerals.