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Method for sequestering carbon dioxide

A carbon dioxide and gas technology, applied in the field of sequestering carbon dioxide greenhouse gas, can solve problems such as no method or technology found

Inactive Publication Date: 2011-03-30
钟少军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from these reviews that there are many methods and technologies with good application prospects, but we have not yet found a mature enough effective, applicable, economical and environmentally friendly method or technology

Method used

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  • Method for sequestering carbon dioxide
  • Method for sequestering carbon dioxide
  • Method for sequestering carbon dioxide

Examples

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Embodiment 1

[0107] Embodiment 1. apply the present invention to sequester the carbon dioxide of 500,000 kilowatts coal power plant flue gas:

[0108] According to the International Energy Agency, coal provides 26.5% of the world's energy and 41.5% of its electricity. Burning coal is the most important source of human carbon dioxide emissions. Flue gas from coal power plants not equipped with sulfur and dust removal systems is usually very hot (above 100°C), contains about 12% to 14% carbon dioxide by volume, about 13% moisture, about 3% oxygen, about 70% Up to 72% nitrogen and a small amount of sulfur dioxide, sulfur trioxide, nitrogen oxides, hydrogen chloride gas and dust particles.

[0109] According to a preferred embodiment of the present invention, the hot flue gas is first sprayed with a cold alkaline solution to reduce its temperature to about 60°C or below. Most of its strong acid gas and dust particles are also removed at the same time. The cooled flue gas reacts with alkalin...

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Abstract

The present invention discloses a method for sequestering carbon dioxide (CO2) that includes generating ammonia from an ammonium salt to make a basic ammoniated aqueous solution and using the solution to remove at least a portion of CO2 from a CO2-bearing gas and precipitate the removed CO2 as bicarbonate. The aqueous solution is recycled. Various valuable byproducts, including sodium bicarbonate, sodium carbonate, ammonium bicarbonate, and hydrochloric acid, are produced. Ammonia is generated by reacting an ammonium salt with either acidic or basic materials. Non-limiting examples of suitable ammonium salt include ammonium chloride, ammonium sulfate, ammonium bisulfate, and ammonia nitrate, those of the acidic material include ammonium bisulfate and sulfuric acid, and those of the basic material include calcium oxide, limestone, dolomite, cement kiln dust, calcium-rich fly ash, steel and iron slag, and silicate rocks or mining wastes that are rich in serpentine, olivine or wollastonite.

Description

technical field [0001] The invention relates to a method for sequestering carbon dioxide greenhouse gas. Specifically, the method of the present invention comprises using ammonium salts to prepare ammonia gas, dissolving the ammonia gas in a circulating aqueous solution to prepare an alkaline ammoniated solution, and finally using the alkaline ammoniated solution to absorb at least part of the carbon dioxide in the gas and convert it Precipitation for bicarbonate, while regenerating a recyclable aqueous solution. Background technique [0002] Human activities, such as burning fossil fuels for energy, pump large amounts of carbon dioxide (and other acidic gases such as sulfur dioxide and hydrogen chloride) into the atmosphere. For example, humans emitted approximately 29.22 billion tons of carbon dioxide into the atmosphere in 2006. About half of the carbon dioxide emitted by humans to the atmosphere remains in the atmosphere, causing the concentration of atmospheric carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/62C01C1/26C01D7/00
CPCC01F11/18C01B7/055B01D2251/206B01D53/62Y02C10/04C01F11/24C01C1/26Y02P20/151Y02C20/40
Inventor 钟少军
Owner 钟少军
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