# US 10,767,556 B2 · Method and equipment for combustion of ammonia > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,767,556 B2 - Document ID: US10767556B2 - Status: Granted - Kind: B2 - Application number: 15/999,280 - Filed: 2017-02-10 - Published: 2019-04-11 - Granted: 2020-09-08 - Earliest claimed: 2016-02-15 - Assignees: Siemens Aktiengesellschaft - Applicants: Siemens Aktiengesellschaft - Inventors: Ghenadie Bulat; Timothy Hughes; Jonathan May; Ian Wilkinson - Web page: https://patentgrep.com/patent/US10767556B2 ## CPC - F02C 3/24: the fuel or oxidant being liquid at standard temperature and pressure - F01K 23/10: with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence) - F01K 23/18: characterised by adaptation for specific use - F02C 3/20: using a special fuel, oxidant, or dilution fluid to generate the combustion products - F02C 3/22: the fuel or oxidant being gaseous at standard temperature and pressure (F02C3/28 takes precedence) - F02C 3/34: with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle - F02C 6/04: Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output (F02C6/18 takes precedence {; for a fluidised-bed combustor F02C3/205}) - F23C 6/04: in series connection (consuming smoke or fumes in separate combustion apparatus F23G7/06) - F23C 9/06: for completing combustion - F23C 2900/9901: Combustion process using hydrogen, hydrogen peroxide water or brown gas as fuel - F23J 2215/10: Nitrogen; Compounds thereof - F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00) - F01K: STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; nuclear power plants, engine arrangements therein G21D) - F23C: METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN {A CARRIER GAS OR} AIR (burners F23D) - F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06) ## Abstract A method for the combustion of ammonia, wherein a first combustion chamber receives ammonia and hydrogen in controlled proportions, and an oxygen-containing gas. Combustion of the ammonia and hydrogen produces NH2 ions among other combustion products. A second combustion chamber receives the combustion products from the first combustion chamber and receives further ammonia and further hydrogen in controlled proportions, wherein combustion produces nitrogen oxides among other combustion products. A third combustion chamber receives the nitrogen oxides along with further ammonia and further hydrogen in further controlled proportions along with further oxygen-containing gas, such that the nitrogen oxides are combusted into nitrogen and water. ## Claims ### Claim 1 A method for the combustion of ammonia, wherein a first combustion chamber receives ammonia and hydrogen in controlled proportions, and an oxygen-containing gas, wherein combustion of the ammonia and hydrogen produces NH2 ions among exhaust gases from the first combustion chamber, and wherein a second combustion chamber receives the exhaust oases from the first combustion chamber and receives further ammonia and further hydrogen in controlled proportions, wherein combustion in the second combustion chamber produces nitrogen oxides among exhaust gases from the second combustion chamber, and wherein a third combustion chamber receives the exhaust gases from the second combustion chamber including nitrogen oxides along with further ammonia and further hydrogen in further controlled proportions along with further oxygen-containing gas, such that the nitrogen oxides are combusted into nitrogen and water. ### Claim 2 (depends on 1) The method for the combustion of ammonia according to claim 1 wherein energy from the combustion in the second combustion chamber is recovered by operation of a first turbine by the exhaust gases from the second combustion chamber to convert energy from the combustion in the second combustion chamber into mechanical energy. ### Claim 3 (depends on 2) The method for the combustion of ammonia according to claim 2 wherein energy from the combustion in the first combustion chamber is recovered by operation of a second turbine by the exhaust gases from the first combustion chamber to convert the energy from the combustion in the first combustion chamber into mechanical energy. ### Claim 4 (depends on 1) The method for the combustion of ammonia according to claim 1 wherein energy from the combustion in the third combustion chamber is recovered by operation of a third turbine to convert the energy from the combustion in the third combustion chamber into mechanical energy. ### Claim 5 (depends on 4) The method for the combustion of ammonia according to claim 4 wherein operation of the third turbine is by heating of water in a heat exchanger to drive the third turbine by steam. ### Claim 6 (depends on 1) The method for the combustion of ammonia according to claim 1 wherein heat is recovered from the third combustion chamber by an integrated heat exchanger. ### Claim 7 (depends on 1) The method for the combustion of ammonia according to claim 1 wherein a proportion of exhaust gases from the third combustion chamber is recirculated into the first combustion chamber in order to provide combustion of ammonia remaining in the exhaust gases from the third combustion chamber. ### Claim 8 A system for the combustion of ammonia, comprising: a first combustion chamber connected to a source of ammonia, to receive ammonia, and connected to a source of hydrogen, to receive hydrogen, in controlled proportions, and connected to a source of oxygen-containing gas, to receive an oxygen-containing gas; a second combustion chamber connected to the first combustion chamber to receive exhaust gases from the first combustion chamber, and connected to the source of ammonia to receive further and connected to the source of hydrogen to receive further hydrogen in further controlled proportions; and a third combustion chamber connected to the second combustion chamber to receive exhaust gases from the second combustion chamber, and connected to the source of ammonia to receive further ammonia and, and connected to the source of hydrogen to receive further hydrogen in further controlled proportions, and connected to the source of oxygen-containing gas to receive further oxygen-containing gas. ### Claim 9 (depends on 8) The system according to claim 8, further comprising a first turbine connected to receive the exhaust gases from the second combustion chamber, to generate a mechanical output and to provide the exhaust gases from the second combustion chamber to the third combustion chamber. ### Claim 10 (depends on 3) The system according to claim 3 further comprising a second turbine connected to receive the exhaust gases from the first combustion chamber and to provide the exhaust gases from the first combustion chamber to the second combustion chamber. ### Claim 11 (depends on 10) The system according to claim 10 further comprising a third turbine connected to a heat exchanger which is connected to receive exhaust gases from the third combustion chamber, whereby to heat water and generate steam to drive the third turbine. ### Claim 12 (depends on 11) The system according to claim 11 wherein the heat exchanger is integrated into the third combustion chamber. ### Claim 13 (depends on 8) The system for the combustion of, ammonia according to claim 8, further comprising a recirculation line arranged to recirculate a portion of exhaust gas from the third combustion chamber back into the first combustion chamber. ### Claim 14 (depends on 13) The system for the combustion of ammonia according to claim 13 wherein the recirculation line is connected to a mixer to mix the proportion of the exhaust gas the third combustion chamber with the oxygen-containing gas. ### Claim 15 (depends on 8) The system for the combustion of ammonia according to claim 8 the source of hydrogen is a single source connected to any two of said first combustion chamber, said second combustion chamber, and said third combustion chamber. ### Claim 16 (depends on 8) The system for the combustion of ammonia according to claim 8 wherein, the source of hydrogen is a single source connected to all of said first combustion chamber, said second combustion chamber, and said third combustion chamber. ### Claim 17 (depends on 8) The system for the combustion of ammonia according to claim 8 wherein, the source of oxygen-containing gas is a single source connected to both of said first combustion chamber and said third combustion chamber. ### Claim 18 (depends on 8) The system for the combustion of ammonia according to claim 8 wherein, the source of ammonia is a single source connected to any two of said first combustion chamber, said second combustion chamber and said third combustion chamber. ### Claim 19 (depends on 8) The system for the combustion of ammonia, according to claim 8 wherein, the source of ammonia is a single source connected to all of said first combustion chamber, said second combustion chamber, and said third combustion chamber.