METHOD FOR GASIFYING ORGANIC SUBSTANCE

• Main Authors: SAKAI MASAYASU, HORIZOE HIROTOSHI, HASHIMOTO RITSUO, TAKEUCHI YOSHIYUKI, KANEKO MASAHITO
• Format: Patent
• Language: English
• Published: 13.09.1994
• Edition: 5
• Subjects: CARBURETTING AIR OR OTHER GASES; CHEMISTRY; FUELS; LUBRICANTS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; TECHNICAL GASES CONTAINING CARBON MONOXIDE

PURPOSE:To suppress the generation of soot or NOx and gasify an organic substance by treating the organic substance at a high temperature without forming a solid-phase carbonaceous substance or a liquid tarry substance in the presence of steam and oxygen, producing a gas at high concentrations of H2 and CO and then gasifying the unreacted substance, etc. CONSTITUTION:The gasifying reaction in the first stage for gasifying an organic substance in the presence of steam and oxygen at a temperature of >=600 deg.C at which a solid-phase carbonaceous substance is not produced from the organic substance and tar gas is produced without forming a liquid tarry substance and then producing a gas at high H2 and CO concentrations is carried out. A passage between the gasifying reaction in the first stage and the gasifying reaction in the second stage is then narrowed so that the unreacted solid-phase carbonaceous substance in the gasifying reaction in the first stage may be prevented from passing through the gasifying reaction in the second stage. The gaseous unreacted organic substance and tar gas accompanied by the produced gas after the gasifying reaction in the first stage are further subjected to the gasifying reaction at a higher temperature than that in the gasifying reaction in the first stage. Thereby, the generation of soot and NO2 is suppressed to efficiently afford the objective gas utilizable for synthesizing metanol, etc.