Method and system for recycling carbon dioxide
A technology of carbon dioxide and carbonation, applied in the direction of silicon dioxide, chemical instruments and methods, silicon oxide, etc., can solve the problem of high energy consumption and achieve the effect of reducing energy consumption and material consumption
Pending Publication Date: 2018-02-23
YUANCHU TECH (BEIJING) CO LTD
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Problems solved by technology
The main technical defect of this technical route is: in order to realize the recovery and recycling of magnesium chloride, this technology needs to heat magnesium chloride to a high temperature (450°C or above) to generate magnesium oxide or basic magnesium chloride, which makes the energy consumption of the whole process relatively high
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[0039] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the various figures, identical elements are indicated with similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown in the drawings.
[0040] In the following, many specific details of the present invention, such as structures, materials, dimensions, processes and techniques of components, are described for a clearer understanding of the present invention. However, the invention may be practiced without these specific details, as will be understood by those skilled in the art.
[0041] The present invention provides a kind of recycling carbon dioxide (CO 2 ) method and system, using huge and cheap calcium silicate and / or magnesium silicate to absorb carbon dioxide, and finally generate solid state calcium carbonate (CaCO3 ), magnesium carbonate (MgCO 3 ...
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Abstract
The invention discloses a method and a system for recycling carbon dioxide. The method for recycling carbon dioxide comprises the following steps: chloridizing calcium-containing silicate and / or magnesium-containing silicate to obtain calcium chloride and / or magnesium chloride; mixing the calcium chloride and / or magnesium chloride with ammonium hydroxide and carbon dioxide, carrying out carbonation reaction to recover and convert the carbon dioxide into the calcium carbonate and / or magnesium carbonate, and meanwhile, generating an ammonium chloride solution; recovering the ammonium chloride solution generated in a carbonation step, and after hydrogen chloride is generated through decomposition reaction or concentration is carried out, directly being applied for chloridizing the calcium-containing silicate and / or magnesium-containing silicate. According to the method, the ammonium chloride is taken as a catalyst for whole carbon dioxide mineralization reaction, and a final product, i.e.calcium carbonate and / or magnesium carbonate, has high purity and low energy consumption. According to the technology, the recycling of the ammonium chloride is realized. Compared with the prior art,the method is characterized in that material consumption is reduced.
Description
technical field [0001] The invention relates to the fields of chemical industry and environmental protection, and more particularly relates to a method and system for recycling carbon dioxide. Background technique [0002] Collecting and recycling carbon dioxide to reduce greenhouse gas emissions is an important technical issue in the field of climate change, environment and ecology. At present, the collection and disposal of carbon dioxide mainly include geological storage, ocean storage, mineralization storage and biological carbon sequestration. Mineral carbonation and fixation of carbon dioxide refers to the reaction of carbon dioxide with ores containing alkaline or alkaline earth metal oxides (mainly calcium-magnesium silicate ores or industrial and building material wastes) to form carbonates and be sequestered. process. Mineralization storage is the absorption method of carbon dioxide in nature. The generated carbonate is a thermodynamically stable form of carbon a...
Claims
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IPC IPC(8): C01F11/18C01F5/24C01B33/12
CPCC01B33/12C01F5/24C01F11/18C01P2006/80C01P2004/51C01P2004/62B01D53/62B01D53/80B01D53/96B01D2251/402B01D2251/404B01D2257/504C01B32/60Y02C20/40Y02P20/151C01F11/181
Inventor 王麒
Owner YUANCHU TECH (BEIJING) CO LTD