TW201016301A - Carbon dioxide capturing method - Google Patents

Abstract

This invention provides a carbon dioxide capturing method comprising the steps of: (1) preparing sodium hydroxide by electrolyzing saturated salt water; (2) adding sodium hydroxide into sea water so that magnesium chloride and calcium chloride contained in sea water are converted into magnesium hydrate and calcium hydroxide; and (3) introducing carbon dioxide into water containing magnesium hydrate and calcium hydroxide so that carbon dioxide is converted into magnesium carbonate and calcium carbonate. Carbon dioxide can be captured effectively, efficiently, and safely, and the amount of carbon dioxide contained in the atmosphere can be reduced so that emission of carbon dioxide is reduced.

Description

201016301 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a method for capturing a reduction in dioxide (c〇2), in particular to a chemical reaction to emit carbon dioxide (C〇2) The method of capturing. [Prior Art] There are many kinds of chemical substances in the atmospheric environment, which do not affect the ecology under normal conditions and radon concentrations. However, with the footsteps of industrialization, the chemical used in various industrialized machinery and vehicles is used. More and more substances' and the concentration of emissions exceeds the standard, as long as the concentration of any chemical exceeds the standard, it causes air pollution. There are many kinds of air pollutants in today's common and monitored air pollutants: Carbon dioxide C02, Carbon monoxide CO, Sulfur dioxide S02, and Nitrogen oxide. Gen oxides NOx, Suspended particulates, ozone (〇zone〇3) and volatile organic compounds (VOCs). Air pollution has direct or indirect effects on humans and the environment, of which direct The impact includes: harm to the health of human beings and animals and plants that survive in the ecosystem; and indirect effects include: the related problems caused by acid rain and global warming. The most important "greenhouse gases" in the atmosphere are carbon dioxide (C02), methane (CEU) and nitrogen monoxide (N〇2). The so-called "greenhouse gas" is the atmospheric gas that will increase the temperature of the earth in 201016301. The high temperature is the most important environmental issue at present, especially the impact of carbon dioxide ((3)2) on the global climate warming'. The most important time for climate hyperthermia is the atmospheric greenhouse gas, which increases the 'how' of the atmosphere. The concentration of carbon dioxide (co2) has dropped, and 'the most urgent issue for the earth's environmental protection. All countries are actively engaged in the reduction of carbon dioxide emissions (C〇2). ^The law avoids the use of fossil fuels τ, improve the efficiency of fossil fuel combustion, and with the capture, storage and reuse technology of the oxidizing barrier, it will effectively reduce the deterioration of the greenhouse response, so that humans continue to enjoy the "low" The 1 source "'Step-by-step transition to the future_Energy era.- Natural carbon: deposit" refers to the purpose of storing carbon dioxide in a specific artificial tank and chemical reaction V/. Forest, ocean, stratum, device." The reaction can be used as a storage for carbon dioxide. In the international arena, "big regulations =, surface sealing and ocean sealing 22 = ... US dollars, operating costs per =" are about 5 jH-, 3.2 US dollars舆〇·5~1〇〇一为, the recycling of the cycle of power generation sneak smouldering trapped into: / US 70 'sea storage costs about 5 to 30 US dollars, the ground is 〇 $ this is about 5 〇, the dollar. See Lin Zhenguo In the book, "2" sees the deposit", scientific development, May, 413, 28~=匕碳别 201016301 In the above-mentioned technology for sequestration of carbon dioxide, will there be appropriate tolerance?" - The storage technology has not seen silk, and it also has problems of stability and/or subsequent monitoring. SUMMARY OF THE INVENTION In view of the shortcomings of the above-mentioned conventional carbon dioxide storage technology, the inventor has felt that it has not been perfected to improve the 'satisfaction of his heart and mind research, and based on his accumulated experience in the eve of the year. In turn, a method for capturing carbon dioxide carbon has been developed in order to achieve a large, rapid and safe capture of carbon dioxide, which reduces the global carbon dioxide concentration. The present invention provides a method for capturing carbon dioxide, the steps of which include: (1) electrolyzing saturated brine to obtain sodium hydroxide, and the reaction formula is: 2 NaCl + 2 H20 2 NaOH + Cl2 + H2 ;; Sodium hydroxide is added to seawater to convert magnesium chloride and calcium chloride in seawater into magnesium hydroxide and calcium hydroxide. The reaction formula is: ginseng MgCl2 + 2 NaOHy[g(〇H)2 + 2 NaCl

CaCl2 + 2 NaOH Ca(OH)2 + 2 NaCl; (3) Introducing carbon dioxide into water containing magnesium hydroxide and barium strontium oxide to convert it into magnesium carbonate and calcium carbonate. The reaction formula is: Mg(OH) 2 + C02 MgC03 + H20

Ca(OH)2 + C02 CaC03 + H20. In the above carbon dioxide capture method, the remainder of the step (1) and the cesium salt water are the south water having a high salt concentration, and preferably the wheat discarded product after the seawater is desalinated. Λ 201016301 Electrolyzed brine generation gas The sodium hydroxide in the step (1) can be a by-product of gas. DETAILED DESCRIPTION OF THE INVENTION In order to fully understand the objects, features and advantages of the present invention, the present invention will be described by the following specific embodiments and the accompanying drawings. - a carbon dioxide capture method, mainly comprising two steps: (1) electrolyzing fresh brine, obtaining silk (7) in the sea: © adding sodium hydroxide to convert magnesium gasification and gasification in seawater into gas oxygen (10) and hydrogen Pour, the reaction formula is; (3) lead to the oxidation of the gas-containing oxidation town and the hydrogen-oxygen water towel, which is converted into money magnesium and carbon. Among them, in the preparation of sodium hydroxide (NaOH), the sodium hydroxide system can be an industrial raw material, a by-product of the chlorine gas process, and the common method is to electrolyze the salt to the chlorine element and all of the chlorine gas escapes, and then stay in the solution. There is only one solute of sodium hydroxide, and the reaction equation is: 2 NaCl + 2 H20 - 2 NaOH + Cl2 + H2, and the hydroxide of the reactants in the carbon dioxide capture method of the present invention can be obtained by electrolytically saturating the brine. Sodium, wherein the saturated brine is obtained from waste products after desalinization of seawater. Early seawater desalination is concentrated in the dry Middle East, and the rapid development of industry and commerce, coupled with the increasing population, the world needs a lot of water. In today's increasingly difficult water source development, countries around the world must quickly find new ones. The water source, in which desalination technology is developed, is the most commonly used method for advanced countries 201016301. The ocean has the largest area on the earth, and the ocean is the most stable water source on the earth. In the four seasons, no matter how windy or rainy, the total 1 of the ocean will not change much and will not disappear. Technology, seawater is the source of the highest quality human water. Among them, seawater desalination is a technology for treating water. The principle is to separate the salt water into two parts, which are low-salt fresh water, and the other part is high-salt water and then desalinated water. Part of the desalination technology, in the experimental phase, and in July of the year, the two most commonly used desalination technologies are reverse osmosis (47.2% of global desalination capacity) and multi-level (36.5% of global desalination capacity). The carbon dioxide capture method of the present invention can be used to prepare sodium hydroxide by abandoning 16 from 7jC" after the desalination of the seawater in Hunan, and effective waste utilization, and at the same time, the earth resources are well managed. The chlorine gas produced at the same time as the steel hydroxide steel is also widely used in the production of polyvinyl chloride 2CHC1)n_, and since the polyethylene gas is made of ethylene gas and catalyst, it has fireproof and heat-resistant effects. Polychlorinated women can also be misappropriated in a variety of different products: wire electrical regulations, fiber optic cables, shoes, Feng Jiangdai ^ hand ribs, bags, accessories, signs and advertising, /, furniture, hanging Decorations, rollers, pipes, toys, curtains, roller doors, auxiliary medical U, main fashion, etc. H, gloves, plastic wrap for certain foods, adding sodium hydroxide to seawater, converting into barium magnesium oxide and oxidizing feed to make magnesium chloride and chlorination in seawater. The reaction formula is... 201016301

MgCl2 + 2 NaOH Mg(OH)2 + 2 NaCl CaCl2 + 2 NaOH Ca(OH)2 + 2 NaCl The composition of the elements in the earth's seawater is shown in Table 1 below.

Element name ' —— _____ Percentage (mass percentage) Oxygen—---- 85.7 Hydrogen 10.8 Gas ' --- 1.9 Sodium " 1.05 ----- 0.1350 Sulfur 0.0885 4 bow '~ ~~ ~~~~_ 0.04 Potassium ~ . _ 0.0380 Bromine 0.0065 Carbon 0.0026 -J

Using the crane and town elements contained in seawater, the two elements are used in the gasification of magnesium and calcium chloride in the seawater, and the gas oxidation steel is used to obtain the next step of the reactant magnesium hydroxide. And calcium hydroxide ^ This is effective in reducing the cost of raw materials for the carbon dioxide capture method of the present invention, and at the same time effectively utilizing the natural resources of the earth. After the above reaction is completed and the magnesium oxide and the hydroxide are fed, the industrial carbon dioxide (C〇2) is introduced, and the carbon dioxide is converted into magnesium carbonate and carbonic acid by reacting with nitrogen in the water. The reaction formula is: Mg(OH)2 + C02 -> MgC03 + H20 Ca(OH)2 + C02 -> CaC03 + H20 successfully captures and converts carbon dioxide into magnesium carbonate and calcium carbonate via the above reaction. It can successfully use the waste generated by the current industry (13⁄4 water for seawater desalination) or the product (sodium hydroxide obtained from gas production) to capture carbon dioxide, not only the entire chemical reaction rate is fast (compared with the current physical method or raw material) Law) 'The overall cost can also be effectively reduced. The final product obtained by the carbon dioxide capture method of the present invention: carbonic acid, which can be used in fireproof building materials and paints, can also be widely used in the production of steelmaking and papermaking, while magnesium carbonate can be used in Flooring, fire protection, fire-fighting products, cosmetics, powders and toothpastes, can also be applied to filler materials, or to produce smoke suppression in plastic products, or to add neoprene rubber as a desiccant, or intestinal laxative Relaxing agents and food color retention agents. The following experimental design is intended to be illustrative, and is not intended to limit the scope of the invention, and it is obvious that such modifications may be made without departing from the scope of the invention. Example 1 (1) Preparation of sodium hydroxide (NaOH) As shown in the first figure, a saturated brine or brine (Brine) was continuously introduced to keep the electrolysis reaction continuously, and sodium hydroxide (NaOH) was continuously obtained. a solution in which a stable current of 40 amps (A) is applied to an electrolytic cell 1 , 11 201016301 and the potential is controlled to be greater than 15 volts (V), and an ion exchange membrane is disposed in the center of the electrolytic cell 1〇 The brine is introduced at the inlet 12, and the 13⁄4 water flows through the electrolytic tank. The reaction at the anode of the electrolytic cell is: ": ^ + with -, the electrolytic chlorine is released from the anode; and the reaction at the cathode 18 of the electrolytic cell For: 2H2〇+ 2e-_>20ir + H2' electrolysis produces hydrogen from the cathode, and the sodium ion (Na+) in the solution combines with hydroxide ions (OH-) to form a sodium hydroxide solution (NaOH (aq)). The outlet 14 is discharged, and after 24 hours of continuous operation, the result is an average of 5 S grams of ruthenium oxide per hour (2) preparation of magnesium hydroxide and calcium hydroxide and capture of carbon dioxide as shown in the second figure. In the reaction tank 20, there is a seawater inlet 22 for guiding The seawater, a sodium hydroxide inlet 24, is used to introduce the hydrogenation solution obtained in the previous step, and a carbon dioxide inlet 26' for introducing carbon dioxide, and the reactants: seawater, sodium hydroxide and carbon dioxide in the reaction tank 20 The reaction is carried out; the reaction is formed. The magnesium carbonate/calcium carbonate precipitate 29 is precipitated at the bottom of the reaction tank 20, and the seawater after the reaction flows out through the reaction liquid outlet 28, and the reaction formula is as follows:

MgCl2 + 2 NaOH Mg(〇H) 2 + 2 NaCl Mg(OH) 2 + C02 -> MgC03 + H2〇CaCl2 + 2 NaOH — Ca(〇H) 2 + 2 NaCl Ca(OH) 2 + C02 a CaC 〇3 + H20 wherein 'magnesium chloride reacts with sodium hydroxide to form magnesium hydroxide, the 12 201016301 magnesium hydroxide reacts with the carbon dioxide which is passed to form a carbonated town and precipitates at the bottom of the reaction tank 20; calcium chloride and sodium hydroxide The reaction produces a gas oxidized word which is then reacted with the passed carbon dioxide to form a carbolic acid dance which is also deposited at the bottom of the reaction tank 20. In the above equipment, adding 9 grams of hydroxide steel to one kilogram of seawater and adding a sufficient amount of aerated carbon dioxide can obtain an average of 445.9 grams of magnesium carbonate and 92.3 grams of calcium carbonate. After conversion, an average of one kilogram of seawater is added to 90. Sodium hydroxide can capture 277 grams of carbon dioxide. (3) Evaluating the cost of carbon dioxide capture technology After the above conversion, adding 9 grams of sodium hydroxide per kilogram of seawater can capture 277 grams of 'one gasification end _, and evaluate one ton. The cost of carbon dioxide capture is as shown in Table 2 below. Show: Table 2, the estimated cost of processing a metric ton of carbon dioxide into the cost of the project is about 31.511 US dollars equipment _ _ about 5.351 US dollars operation about 1.338 dollars material about 23.438 dollars other about 1.000 dollars total ..... US dollars

After the estimated cost, it costs about 62.638 US dollars per metric ton of CO2 capture. Compared with the current cost of geological storage technology, it costs 50~1 〇〇 per cent per cubic centimeter of CO2, but the method of dioxin capture of this (4) has: A 201016301 = ==Chemical reaction and physical reaction is no need to physically seal the future monitoring cost two: == small -, then lower: cost; F, the final product has many: ^ value will be used under the The preferred embodiment discloses that the embodiment of the present technology H is only used for the gift of the day and month, and should not be solved: the change: the fence. It should be noted that all of the embodiments and the like should be considered to be within the scope of the present invention. Therefore, the scope of protection of the following is defined by the scope of the patent application below. [Simplified illustration of the drawing] The figure is a schematic diagram of electrolysis of electrolytically saturated brine (from water) in the present invention. The second figure is a schematic view of the reaction of preparing magnesium hydroxide and calcium hydroxide in the present invention and capturing the oxidation. [Main component symbol description] 10 Electrolyzer 12 Inlet 14 Outlet 16 Ion exchange membrane 17 Anode 18 Cathode 20 Reaction tank 14 201016301 ❿

22 Seawater inlet 24 Sodium hydroxide inlet 26 Carbon dioxide inlet 28 Reaction waste effluent outlet 29 Magnesium carbonate/calcium carbonate precipitate 15

Claims (1)

201016301 X. Patent application scope: 1. A method for capturing carbon dioxide, the steps thereof include: (1) Electrolyzing saturated brine to obtain sodium bismuth oxide, the reaction formula is: 2 NaCl + 2 H2〇2 NaOH + Cl2 + π2; (2) Adding sodium hydroxide to seawater to convert magnesium gasification and calcium chloride in seawater into magnesium hydroxide and calcium strontium oxide. The reaction formula is: . MgCl2 + 2 NaOH Mg(OH)2 + 2 NaCl · CaCl2 + 2 NaOH ten ca(OH)2 + 2 NaCl; ❹ (3) Introduce carbon dioxide into water containing magnesium hydroxide and calcium hydroxide, and convert it into carbonated and carbonated mom. The reaction formula is: Mg ( OH)2 + C02 MgC03 + H20 Ca(OH)2 + C02 -» CaC03 + H20 ° I, the carbon dioxide capture method according to claim i, wherein the saturated brine in the step (1) is high salt 4 water in concentration. For example, in the carbon dioxide capture method of claim 2, the brine system is a waste product after seawater desalination. , = the carbon dioxide capture method of claim 1 of the patent scope, wherein the hydroxide (4) in the step (1) can produce chlorine as a by-product of the electrolyzed brine.