Preparation method and application of nano carbon dioxide capture agent

Abstract

The invention relates to a preparation method and application of a nano-carbon dioxide capture agent. The preparation method of the nano-carbon dioxide capture agent of the present invention uses cationic surfactant-modified bentonite as a carrier, and supports cationic surfactant-modified chitosan and graphene oxide. And loading organic base modified hydrotalcite to prepare CO 2 The nano-capture agent has the photocatalytic effect of nano-materials, captures and aggregates carbon dioxide in the air and enriches around the leaves and stems for absorption and utilization by crops, enhances photosynthesis, increases photosynthetic rate, inhibits photorespiration at night, synthesizes chlorophyll for crop growth, and accumulates crops The three elements of carbon, hydrogen, and oxygen necessary for growth can effectively absorb, synthesize, and transform organic components such as nitrogen, phosphorus, and potassium in the soil, and fully promote the breeding, growth, and maturity of crops to increase production and income; the CO of the present invention 2 The capture agent can be used for facility crops as well as field crops. This kind of CO under normal temperature and pressure 2 Catchers have a wide range of applications.

Description

technical field [0001] The invention relates to a carbon dioxide capture agent, in particular to a preparation method of a nanometer carbon dioxide capture agent and its application in plant photosynthesis, and belongs to the field of carbon dioxide capture agents. Background technique [0002] Global warming has become one of the most serious problems facing the world. The massive emission of greenhouse gases is the main cause of global warming. The greenhouse effect gases mainly include carbon dioxide (CO 2 ), methane (CH 4 ), nitrous oxide (N 2 O) and other gases, carbon dioxide has the greatest effect on the greenhouse effect and the largest emission, so reducing carbon dioxide emissions is the key to slowing down global warming, so capturing and storing CO 2 is of great importance, on the other hand CO 2 is a potential chemical resource, so how to recover CO efficiently and economically 2 have important economic and social significance. [0003] At present, the met...

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Problems solved by technology

[0004] Non-carbonaceous adsorbents include: zeolite and quartz, the advantages are cheap, the disadvantages are easy moisture absorption, high regeneration energy consumption, and poor adsorption performance; metal organic framework MOFs, the advantage is that the pore size is easy to control, the disadvantage is high cost, not suitable for high temperature Use, alkali metal-based materials K, Na, etc., the advantage is that it can absorb carbon dioxide in a humid environment, the disadvantage is poor adsorption performance, high desorption energy consumption, metal oxide carbonate materials CaO, MgO, etc., the advantage is that the adsorbent before combustion, The disadvantage is the need for continuous addition of adsorbent

[0005] Carbonaceous adsorbents include: ordered porous carbon, which has the advantages of high chemical stability, easy modification of pore size and surface, and uniform pore size distribution. The disadvantage is poor selectivity. Activated carbon fibers ACFs have the advantages of nanostructure and many micropores, but It is only used to treat granular and powder materials. Activated carbon has the advantages of unique water resistance, stability, and easy regeneration. The disadvantage is that the adsorption capacity is limited and the particle size is large.

[0006] Neither non-carbonaceous adsorbents nor carbonaceous adsorbents can be directly used on plant leaves; in addition, liquid amine and alcohol amine solutions are currently used to directly absorb carbon dioxide. This method has high adsorption capacity, good selectivity, and high efficiency. There are still inherent shortcomings such as high cost, corrosion of equipment, difficulty in recovery, easy volatility, and poor cycle performance.

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