Method for enhancing shale carbon dioxide adsorption performance and cooperatively storing nitrogen dioxide

Abstract

The invention discloses a method for enhancing the carbon dioxide adsorption performance of shale and cooperatively storing nitrogen dioxide, which utilizes nitrogen dioxide to improve the adsorptionperformance of shale on carbon dioxide and achieves the purpose of reducing nitrogen dioxide emission at the same time. Specifically, nitrogen dioxide molecules with high chemical activity react withunderground water of a shale reservoir to generate nitric acid and nitric oxide; on one hand, the generated nitric acid can dissolve carbonate and other mineral components in the shale to expose partof pores of the shale, so that the carbon dioxide adsorption performance of the shale is enhanced; and on the other hand, the shale reservoir environment is an anoxic environment, the generated nitricoxide cannot be oxidized to generate nitrogen dioxide, and the shale has a strong chemical adsorption effect on the nitric oxide and is difficult to desorb, so that the long-term stable storage of the shale on the nitrogen dioxide is realized. According to the method, the nitrogen dioxide is cooperatively stored in the process of storing greenhouse gas carbon dioxide, thereby providing an effective way for reducing the coal-fired flue gas denitration treatment cost.

Description

technical field [0001] The invention relates to a method for using nitrogen dioxide to enhance the carbon dioxide adsorption performance of shale and to co-storage the nitrogen dioxide, and belongs to the technical fields of greenhouse gas emission reduction technology and important coal-fired flue gas pollutant treatment technology. Background technique [0002] With the massive combustion of fossil fuels such as coal, oil and natural gas, the content of greenhouse gases in the atmosphere has increased sharply, and at the same time it has triggered a series of global climate and environmental problems, such as climate warming, reduction of forest coverage and intensification of acid rain hazards. Among them, the greenhouse gas carbon dioxide (CO 2 ) is the main cause of global warming. According to statistics released by the International Energy Agency (IEA), the emission of carbon dioxide in the atmosphere in 2018 was as high as 33.14 billion tons. Large-scale carbon dio...

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Problems solved by technology

It is characterized by mature technology and high denitrification efficiency, but the increase in coal consumption and the decrease in boiler thermal efficiency will affect the pozzolanic properties of ash and slag, which brings difficulties to the comprehensive utilization of ash and slag; (2) Adsorption methods, including: physical adsorption and chemical adsorption , the commonly used adsorbents include many acids, molecular sieves, activated carbon and silica gel, etc.; it is characterized by high efficiency, the ability to recover useful components, simple equipment and convenient operation, but the adsorption capacity of the adsorbent is small, the required amount of adsorbent is large, and the equipment is huge And regeneration treatment is required; (3) reduction method, including: selective catalytic reduction method, selective non-catalytic reduction method, non-selective catalytic reduction method and catalytic decomposition method, etc., which are characterized by high purification efficiency, but high investment cost, The fuel consumption is large, and the active life of the catalyst is not long; (4) Wet flue gas denitrification technology, including: EDTA complexation method, catalyst oxidation absorption method, Na 2 SO 3 Solution absorption method, etc., are characterized by mature technology and high denitrification efficiency, but one-time investment is large; (5) New desulfurization technologies include: biological nitrification and biological denitrification, which are characterized by low energy consumption and more economy

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