SYSTEM AND METHOD FOR DUAL FLUIDIZED BED GASIFICATION

• Main Authors: APANEL GEORGE, WRIGHT HAROLD A
• Format: Patent
• Language: English
• Published: 05.12.2013
• Subjects: CARBURETTING AIR OR OTHER GASES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMPOUNDS THEREOF; CRACKING HYDROCARBON OILS; FUELS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; LUBRICANTS; METALLURGY; MINERAL WAXES; NON-METALLIC ELEMENTS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLEGASES CONTAINING CARBON MONOXIDE; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR RELEVANT APPARATUS; TRANSPORTING

A method for deep desulfurization of synthesis gas comprising introducing carbonaceous material and optionally steam into a gasifier comprising a heat transfer media, extracting a first heat transfer stream comprising heat transfer media and optionally unconverted carbonaceous material from the gasifier, and introducing at least a portion of the first heat transfer stream into a combustor, introducing oxidant and optionally a fuel into the combustor, extracting a second heat transfer stream comprising heat transfer media from the combustor, and introducing at least a portion of the second heat transfer stream into the gasifier, introducing a compound capable of reacting with sulfur to produce sulfate, sulfide or both, extracting a purge stream comprising ash, sulfate, halide, or a combination thereof from the second heat transfer stream, extracting a flue gas from the combustor, and extracting a gasifier product synthesis gas stream comprising less than 1000 ppm sulfur from the gasifier.