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US 2025/0146664 A1Published application
Ammonia And Low Btu Bio-Fuel Combustion In A Furnace With Thermochemical Heat Exchanger
OwnerHisashi Kobayashiinventor
Life of this patent
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Abstract
Disclosed is a thermochemical regenerative combustion method for fuel containing ammonia and/or other low BTU bio-fuels to achieve fuel efficiency equal to or better than conventional fuels such as hydrogen and natural gas.
Claims19
A method of carrying out combustion in a furnace, comprising
- (A) combusting a reformed fuel formed in step B (1) and step B (2) in the furnace with an oxidant comprising oxygen in a furnace to produce gaseous combustion products, and
- (B) alternately
- (1) passing the gaseous combustion products from the furnace into and through a cooled first regenerator to heat the first regenerator and cool said gaseous combustion products, and passing a fuel comprising ammonia into a heated second regenerator heated in step B (2) and, in the second regenerator, heating said fuel comprising ammonia and dissociating ammonia to form a reformed fuel, thereby cooling said second regenerator, and passing said reformed fuel from the second regenerator into the furnace and combusting the reformed fuel in the furnace, and
- (2) passing the gaseous combustion products from the furnace into and through a cooled second regenerator to heat the second regenerator and cool said gaseous combustion products, and passing a fuel comprising ammonia into the heated second regenerator heated in step B(1) and, in the first regenerator, heating said fuel comprising ammonia and dissociating ammonia to form a reformed fuel thereby cooling said first regenerator, and passing said reformed fuel from the first regenerator into the furnace and combusting the reformed fuel in the furnace.
1 more element
A method of carrying out combustion in a furnace, comprising:
- (A) combusting a fuel product with an oxidant comprising oxygen in the furnace to produce combustion products at a temperature above 1100° C.;
- and
- (B) passing the combustion products from the furnace into a thermochemical regenerator system to transfer heat from said combustion products to an ammonia-based fuel;
- (C) cooling said gaseous combustion products and heating said ammonia-based fuel, thereby allowing said ammonia-based fuel to dissociate into a fuel product;
- (D) passing the fuel product into the furnace;
- and
- (E) exhausting all of the cooled gaseous combustion products to a stack.
4 more elements
A method of carrying out combustion in a furnace, comprising:
- (A) combusting with oxygen a reformed fuel formed in step B (1) and step B (2) in the furnace to produce gaseous combustion products at a temperature above 1100° C., and
- (B) alternately
- (1) passing the gaseous combustion products from the furnace into and through a cooled first regenerator to heat the first regenerator and cool said gaseous combustion products, and passing a fuel with an adiabatic flame temperature of less than 1850° C. into a heated second regenerator heated in step B (2) and, in the second regenerator, heating and transforming said fuel to form a reformed fuel, thereby cooling said second regenerator, and passing said reformed fuel from the second regenerator into the furnace and combusting the reformed fuel in the furnace, and
- (2) passing the gaseous combustion products from the furnace into and through a cooled second regenerator to heat the second regenerator and cool said gaseous combustion products, and passing a fuel with an adiabatic flame temperature of less than 1850° C. into a heated first regenerator heated in step B (1) and, in the first regenerator, heating and transforming said fuel to form a reformed fuel, thereby cooling said first regenerator, and passing said reformed fuel from the first regenerator into the furnace and combusting the reformed fuel in the furnace.
1 more element
Dependencies are inferred from the claim text.