Method and device for methane reforming with chemical chain CO2 by applying CO2 to dimethyl ether synthesis

Abstract

The invention provides a method for methane reforming with chemical chain CO2 by applying CO2 to dimethyl ether synthesis. The method comprises the following steps: performing oxidation reduction reaction on Fe3O4 and CH4 in a CH4 oxidation reactor to generate H2, CO and FeO, using H2 and CO as gas sources of dimethyl ether synthesis and transferring FeO into a CO2 reduction reactor; performing oxidation reduction reaction on FeO and CO2 in the CO2 reduction reactor to generate CO and Fe3O4; and using CO as a gas source of dimethyl ether synthesis and returning Fe3O4 to the CH4 oxidation reactor. The invention further provides a device for realizing the method. The device comprises the CH4 oxidation reactor, the CO2 reduction reactor, a first gas-solid separator, a second gas-solid separator, a CO2 absorption device and a dimethyl ether synthesizer. According to the method disclosed by the invention, partial oxidation of CH4 and CO2 reduction in the methane reforming reaction with CO2 are performed in two steps in different reactors through chemical chain combustion with Fe3O4 as the oxygen carrier, so that the reaction energy barrier is reduced, the reaction efficiency is improved, and the method and the device disclosed by the invention have good industrial application prospect.

Description

technical field [0001] The invention relates to the technical field of dimethyl ether synthesis, in particular to a CO 2 The chemical chain CO applied to the synthesis of dimethyl ether 2 Method and device for reforming methane. Background technique [0002] At present, my country's energy strategy is facing three major dilemmas: first, the defect in the consumption structure - mainly coal, which aggravates environmental pollution; second, the huge supply gap - the shortage of oil, endangering energy security; third, the low utilization efficiency - the economic Extensive, leading to waste of resources. Therefore, my country's energy as a whole will develop in the direction of cleanliness, diversification and high efficiency. [0003] As a non-toxic, non-corrosive, and easy-to-liquefy clean fuel, dimethyl ether not only has high combustion efficiency, good power performance, and low pollution emissions, it is one of the important choices for my country to get rid of the en...

AI Technical Summary

Problems solved by technology

The industrial production of dimethyl ether used the liquid-phase two-step method in the early stage, but due to the large environmental pollution and serious corrosion of the equipment, this process was gradually eliminated.

However, there are many problems in the reaction, such as high reaction energy consumption, the need for noble metal catalysts is not conducive to industrialization, the catalyst is easily deactivated due to carbon deposition, and the conversion rate of reactants is low, so it cannot be applied in industry.

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