Abstract <p>A brief overview of methanol-production technologies is presented. Methanol produced using Power-to-Fuels technology has been shown to be a promising fuel. Electrolysis of water generates hydrogen, which reacts with carbon dioxide. The result of this reaction is methanol. Flue gases from power plants can provide a fairly concentrated stream of CO<sub>2</sub> for this reaction. Particularly promising in such hybrid schemes is the use of biomass for the production of electricity using an electrolyzer as a source of CO<sub>2</sub>. The schemes for producing methanol using fluidized bed technology during biomass combustion are considered in which the generated electricity is sent to an electrolyzer to generate hydrogen and the CO<sub>2</sub> flow is sent to the methanator. Another promising technology is gasification in chemical cycles. Technologies for producing methanol with a minimal carbon footprint are described. New schemes based on circulating fluidized bed (CFB) technology for combustion and gasification of biomass are proposed. Estimates of the performance of a system with a pressurized CFB boiler and a gas turbine for woodchip combustion in boilers, as well as a system using chemical cycles for woodchip gasification, have been performed. Technical and economic indicators, including the reduced cost of methanol, were determined during the life cycle of the plant. The scheme with allothermic gasification and chemical cycles for producing hydrogen seems to be the most promising. It allows to significantly increase the production of methanol. While the implementation of hybrid schemes with CFB boilers can use well-proven equipment, schemes with gas generators and chemical cycles require the use of new, as yet commercially untested solutions.</p>

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Technical and Economic Assessment of the Use of Fluidized Bed Technologies and Chemical Cycles for Methanol Production

  • G. A. Ryabov,
  • D. S. Liton,
  • O. M. Folomeev

摘要

Abstract

A brief overview of methanol-production technologies is presented. Methanol produced using Power-to-Fuels technology has been shown to be a promising fuel. Electrolysis of water generates hydrogen, which reacts with carbon dioxide. The result of this reaction is methanol. Flue gases from power plants can provide a fairly concentrated stream of CO2 for this reaction. Particularly promising in such hybrid schemes is the use of biomass for the production of electricity using an electrolyzer as a source of CO2. The schemes for producing methanol using fluidized bed technology during biomass combustion are considered in which the generated electricity is sent to an electrolyzer to generate hydrogen and the CO2 flow is sent to the methanator. Another promising technology is gasification in chemical cycles. Technologies for producing methanol with a minimal carbon footprint are described. New schemes based on circulating fluidized bed (CFB) technology for combustion and gasification of biomass are proposed. Estimates of the performance of a system with a pressurized CFB boiler and a gas turbine for woodchip combustion in boilers, as well as a system using chemical cycles for woodchip gasification, have been performed. Technical and economic indicators, including the reduced cost of methanol, were determined during the life cycle of the plant. The scheme with allothermic gasification and chemical cycles for producing hydrogen seems to be the most promising. It allows to significantly increase the production of methanol. While the implementation of hybrid schemes with CFB boilers can use well-proven equipment, schemes with gas generators and chemical cycles require the use of new, as yet commercially untested solutions.