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Preparation method and application of fly ash CO2 trapping agent

A fly ash and capture agent technology, applied in applications, other household appliances, chemical instruments and methods, etc., can solve problems such as unsatisfactory, high processing costs, leakage, etc.

Active Publication Date: 2021-04-27
BEIJING FAIRVIEW NEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, GCS technology is not once and for all, due to the CO stored underground 2 Changes in the original geological structure accompanied by earthquakes, volcanic eruptions, human activities, and accumulation of supercritical pressure, or CO 2 - The long-term action of water-rock causes the rock formation to corrode and correspondingly changes the porosity and permeability coefficient of the reservoir and caprock, so leakage is likely to occur, which will have an impact on the ecological environment and human health, such as groundwater pollution , changes in soil environment and geological structure, occurrence of geological disasters, etc.; in addition, the GCS operation procedures are complicated and the processing cost is relatively high, which is more suitable for newly built thermal power plants, and the transformation cost of this technology for existing thermal power enterprises and industrial enterprises The one-time investment and new construction costs are large, which cannot meet the processing CO requirements of most enterprises. 2 requirements

Method used

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  • Preparation method and application of fly ash CO2 trapping agent
  • Preparation method and application of fly ash CO2 trapping agent
  • Preparation method and application of fly ash CO2 trapping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 1. According to the proportion (mass fraction): 25% of urban sludge, 60% of fly ash, 4% of sawdust, 3% of ammonium bicarbonate, 3% of urea, and 8% of kaolin; the fly ash is ball milled and passed through a 200-mesh sieve For standby, further dry and ball mill the non-urban sludge and pass through a 200-mesh sieve for standby, mix and stir the dry powder according to the proportion and quality, mill in a ball mill for 30 minutes, then add 15% (mass fraction) of water to mix evenly, and granulate. The particle size control diameter is 4mm, the molding pressure is 12.1MPa, and the pressure is maintained for 15S; the wet granules of the sample after compression molding are first dried in an oven at (100±1)°C for 2h, and then put into a muffle furnace. Slowly raise the temperature below ℃, then gradually raise the temperature to 500℃, keep it for 30 minutes, raise the temperature to 600℃, keep it for 10 minutes, raise the temperature to 700℃, keep it for 30 minutes and then c...

Embodiment 2

[0071] 1. According to the proportion (mass fraction): 20% clay, 60% fly ash, 4% starch, 3% sodium lauryl sulfate, 3% sucrose, 10% bentonite; ball mill the fly ash to pass 200 mesh Sieve for standby, further ball mill the clay and pass through a 200-mesh sieve for standby; mix and stir the dry powder according to the proportioning quality, mill in a ball mill for 30 minutes, then add 20% (mass fraction) of water and mix evenly, granulate and shape, and the particle size is controlled to a diameter of 2mm. The molding pressure is 12.1MPa, and the pressure is maintained for 15S; the wet granules of the sample after compression molding are first dried in an oven at (100±1)°C for 2 hours, and then put into a muffle furnace, and the temperature is slowly raised below 300°C. Then gradually increase the temperature and fire to 500°C, hold for 30 minutes, heat up to 600°C, hold for 10 minutes, heat up to 700°C, hold for 10 minutes, heat up to 800°C, hold for 10 minutes, and then cool n...

Embodiment 3

[0078] 1. According to the proportioning ratio (mass fraction): 15% coal gangue, 65% fly ash, 4% stearic acid, 3% borax, 3% sorbitol, 13% attapulgite; the fly ash is ball milled to pass 200 mesh Sieve for standby, further ball mill the coal gangue and pass it through a 200-mesh sieve for standby; mix and stir the dry powder according to the proportioning quality, mill in a ball mill for 30 minutes, then add 20% (mass fraction) of water and mix evenly, granulate and shape, and the particle size is controlled to a diameter of 3mm , the molding pressure is 12.1MPa, and the pressure is maintained for 15S; the wet granules of the sample after compression molding are first dried in an oven at (100±1)°C for 2h, and then put into a muffle furnace, and the temperature is slowly raised below 300°C , and then gradually increase the temperature and fire to 500°C, hold for 30 minutes, heat up to 600°C, hold for 10 minutes, heat up to 700°C, hold for 10 minutes, heat up to 800°C, hold for 10...

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Abstract

The invention relates to a preparation method of a fly ash CO2 capturing agent and application of the fly ash CO2 capturing agent in flue gas treatment, saline-alkali soil storage and absorption and saline-alkali soil improvement, and the preparation method of the CO2 capturing agent comprises the following steps: (1) preparation of composite micro ceramic particles; wherein raw materials including fly ash, inorganic waste, a pore forming agent, a carbon forming agent and an additive machine are subjected to dry powder stirring and mixing, ball milling, water adding, mixing, granulating, drying and forming, (2) surface modification, specifically, straight-chain alkane sodium benzenesulfonate and the composite micro ceramic particles obtained in the step (1) are added into an ethanol coupling agent solution, and reaction drying is conducted under preset stability; and (3) modifying, namely the surface-modified composite micro ceramic particles are added into an organic modifier methanol solution, stirring and drying are carried out. The CO2 capturing agent is prepared from the fly ash and the inorganic waste, the waste can be effectively utilized, excellent fly ash CO2 capturing agent performance is obtained through assistance of a specific process, and saline-alkali soil storage and improvement are achieved.

Description

technical field [0001] The present invention relates to a kind of fly ash CO 2 Catching agent preparation method, and fly ash CO 2 The application of the capture agent in the treatment of flue gas and in the sequestration and absorption of saline-alkali land and the improvement of saline-alkali land belongs to the field of carbon neutral treatment agents and applications. Background technique [0002] On September 22, 2020, during the 75th session of the United Nations General Assembly, China proposed the CO 2 Emissions strive to peak before 2030, and strive to achieve carbon neutrality before 2060. Carbon neutrality means that enterprises, groups or individuals measure the total amount of greenhouse gas emissions directly or indirectly produced within a certain period of time, and offset the CO produced by themselves through afforestation, energy conservation and emission reduction, etc. 2 emissions, achieving CO 2 "zero emission". To achieve carbon neutrality, there a...

Claims

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Application Information

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IPC IPC(8): C04B38/06C04B38/02C04B33/135C04B33/132C04B33/13C04B33/04C01B32/50
CPCC04B33/04C04B33/13C04B33/1321C04B33/1352C04B38/009C04B38/02C04B38/0645C04B38/0675C04B2235/6567C04B2235/661C04B2235/77C01B32/50C04B38/0074C04B38/0067C04B38/0054C04B33/132Y02P40/60
Inventor 苏斌苏文锦苏文雯
Owner BEIJING FAIRVIEW NEW TECH CO LTD
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