# US 2014/0191162 A1 · Method and apparatus for biomass gasification > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191162 A1 - Document ID: US20140191162A1 - Status: Published application - Kind: A1 - Application number: 13/737,882 - Filed: 2013-01-09 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Jinmesh Pranav Majmudar - Web page: https://patentgrep.com/patent/US20140191162A1 ## CPC - C10K 1/101: {with water only} - C10J 3/485: {Entrained flow gasifiers} - B01D 53/047: Pressure swing adsorption - B01D 53/1406: {Multiple stage absorption} - B01D 2252/103: Water - B01D 2256/16: Hydrogen - B01D 2256/20: Carbon monoxide - B01D 2256/245: Methane - B01D 2257/2045: Hydrochloric acid - B01D 2257/504: Carbon dioxide - B01D 2258/0283: Flue gases - C10J 3/723: {Controlling or regulating the gasification process} - C10J 2300/0906: Physical processes, e.g. shredding, comminuting, chopping, sorting - C10J 2300/0909: Drying - C10J 2300/0916: Biomass - C10J 2300/165: integrated with a gas turbine or gas motor - C10J 2300/169: with water treatments - C10J 2300/1815: for carbon dioxide - C10K 1/026: {by centrifugal forces (cyclones B04C)} - Y02P 20/145: the feedstock being materials of biological origin - Y02P 20/151: Reduction of greenhouse gas [GHG] emissions, e.g. CO2 - C10K: PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE - C10J: PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES (synthesis gas from liquid or gaseous hydrocarbons C01B; underground gasification of minerals E21B43/295); CARBURETTING AIR OR OTHER GASES - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A system includes a gasifier configured to gasify a mixture of a biomass feedstock and an oxidant to generate a producer gas and a producer gas purification system configured to purify the producer gas from the gasifier. The system also includes a gas supply system configured to supply a gas that is not the oxidant to at least one of the gasifier, or the producer gas purification system, or any combination thereof. ## Claims ### Claim 1 A system, comprising: a gasifier configured to gasify a mixture of a biomass feedstock and an oxidant to generate a producer gas; a producer gas purification system configured to purify the producer gas from the gasifier; and a gas supply system configured to supply a recycle gas to at least one of the gasifier, or the producer gas purification system, or any combination thereof, wherein the recycle gas comprises an exhaust gas, one or more gases separated from the exhaust gas, or a combination thereof, generated from a combustion system. ### Claim 2 (depends on 1) The system of claim 1, comprising a gas separator configured to separate the exhaust gas into at least a first gas and a second gas, wherein the gas supply system is configured to use the first gas as the recycle gas. ### Claim 3 (depends on 2) The system of claim 2, wherein the first gas comprises carbon dioxide separated from the exhaust gas and used as the recycle gas. ### Claim 4 (depends on 2) The system of claim 2, wherein the gas separator comprises a pressure swing absorption system. ### Claim 5 (depends on 1) The system of claim 1, comprising the combustion system configured to generate the exhaust gas from a combustion of the producer gas. ### Claim 6 (depends on 1) The system of claim 1, comprising a controller coupled to the gas supply system, wherein the controller has a first mode configured to provide the recycle gas to the gasifier and a second mode configured to provide the recycle gas to the producer gas purification system. ### Claim 7 (depends on 1) The system of claim 1, wherein the gasifier comprises: a first opening configured to receive the oxidant; and a second opening configured to receive the recycle gas, wherein the second opening is separate from the first opening. ### Claim 8 (depends on 1) The system of claim 1, wherein the gas supply system is configured to supply the recycle gas to the producer gas purification system at a lower temperature than the producer gas. ### Claim 9 (depends on 8) The system of claim 8, wherein the producer gas purification system comprises one or more scrubbers, and the recycle gas is configured to cool producer gas in the one or more scrubbers. ### Claim 10 (depends on 8) The system of claim 8, wherein the recycle gas comprises the exhaust gas, carbon dioxide separated from the exhaust gas, nitrogen separated from the exhaust gas, or any combination thereof. ### Claim 11 A system, comprising: a gasifier configured to gasify a mixture of a biomass feedstock and an oxidant to generate a producer gas; a producer gas purification system configured to purify the producer gas from the gasifier; a combustion system configured to combust the producer gas from the producer gas purification system to generate an exhaust gas; and a pressure swing adsorption system configured to separate the exhaust gas from the combustion system into a first gas and a second gas, wherein the pressure swing absorption system is configured to supply the first gas to at least one of the gasifier, or the producer gas purification system, or any combination thereof. ### Claim 12 (depends on 11) The system of claim 11, wherein the producer gas purification system comprises at least one scrubber configured to scrub the producer gas from the gasifier, and the pressure swing absorption system is configured to supply the first gas to the at least one scrubber at a lower temperature than the producer gas to facilitate cooling. ### Claim 13 (depends on 11) The system of claim 11, wherein the producer gas purification system comprises: a first water scrubber configured to receive the producer gas from the gasifier; a second water scrubber configured to receive the producer gas from the gasifier or the first water scrubber, wherein at least one of the first or second water scrubbers comprises a chilled water scrubber; a water source configured to supply water to at least one of the first or second scrubbers, wherein the first gas is configured to facilitate cooling in at least one of the first or second scrubbers. ### Claim 14 (depends on 11) The system of claim 11, wherein the first gas comprises carbon dioxide. ### Claim 15 (depends on 11) The system of claim 11, comprising a controller having a first mode and a second mode, wherein the first mode is configured to provide the first gas, the second gas, or the exhaust gas to the gasifier, wherein the second mode is configured to provide the first gas, the second gas, or the exhaust gas to the producer gas purification system. ### Claim 16 A method, comprising: gasifying a mixture of a biomass feedstock and an oxidant in a gasifier to generate a producer gas; purifying the producer gas from the gasifier using a producer gas purification system; combusting the producer gas to generate an exhaust gas using a combustion system; separating the exhaust gas into a first gas and a second gas using a pressure swing adsorption system; and supplying the first gas to at least one of the gasifier, or the producer gas purification system, or any combination thereof. ### Claim 17 (depends on 16) The method of claim 16, wherein supplying the first gas comprises controlling a flow rate of the first gas based on a temperature of the producer gas in the gasifier. ### Claim 18 (depends on 16) The method of claim 16, wherein the first gas comprises carbon dioxide. ### Claim 19 (depends on 16) The method of claim 16, wherein supplying the first gas to the gasifier comprises facilitating a reaction to convert char into carbon monoxide. ### Claim 20 (depends on 16) The method of claim 16, wherein supplying the first gas to the producer gas purification system comprises facilitating cooling in at least one scrubber used to scrub the producer gas.