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US 10,962,224 B2Granted
Sorbents for coal combustion
AssigneeNOx II, Ltd.
InventorDouglas C. Comrie
Life of this patent
Estimating the term…
Abstract
Sorbent compositions containing calcium and iodine are added to coal to mitigate the release of mercury and/or other harmful elements into the environment during combustion of coal containing natural levels of mercury.
Claims20
A method for reducing mercury and sulfur released into the atmosphere from burning coal, comprising:
- adding a mercury sorbent comprising a halogen and a sulfur sorbent comprising calcium to coal prior to combustion;
- delivering the coal into a furnace;
- combusting the coal in the furnace to produce ash and flue gas;
- removing ash from the flue gas by capturing the ash in a particulate removal system disposed in a convective pathway downstream of the furnace, wherein the captured ash comprises oxidized mercury formed in the furnace or in the convective pathway downstream of the furnace;
- and
- measuring at least one of a level of sulfur gases in the flue gas or a level of mercury gases in the flue gas.
3 more elements
A method for reducing an amount of mercury and sulfur released into the atmosphere from burning coal, comprising
- adding a mercury sorbent comprising a halogen and a sulfur sorbent comprising calcium to coal prior to combustion;
- delivering the coal into a furnace;
- combusting the coal in the furnace to produce ash and flue gas;
- removing ash from the flue gas by capturing the ash in a particulate removal system disposed in a convective pathway downstream of the furnace, wherein the captured ash comprises oxidized mercury formed in the furnace or in the convective pathway downstream of the furnace;
- and
- measuring at least one of a level of sulfur gases in the flue gas or a level of mercury gases in the flue gas and adjusting an amount of the mercury sorbent or an amount of the sulfur sorbent added to the coal based on at least one of a measured level of mercury or a measured level of sulfur.
3 more elements
Dependencies are inferred from the claim text.