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High-hygroscopicity light porous particulate warm cloud fog catalyst

A porous particle, high hygroscopic technology, applied in molecular sieve catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problem of unsatisfactory effect of reducing warm cloud and fog, unable to inhibit the secondary evaporation of water molecules, and the catalytic effect of warm cloud and fog. It can quickly eliminate warm clouds and fog, improve the operation effect, and enhance the efficiency of collision and merger.

Active Publication Date: 2020-03-27
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the bottom of the convective cloud, the aircraft directly carries the ignitable hygroscopic propellant, or burns the hygroscopic propellant on the ground, or throws burning smoke sticks from the plane into the cloud at high altitude to achieve spreading, but the operation effect of reducing the warm cloud is not enough. not ideal
[0006] At present, warm cloud catalysts have emerged, which are based on hygroscopic materials such as diatomaceous earth and superabsorbent resins. Molecular absorption capacity is still weak, the catalytic effect on warm clouds is not obvious, and there is also a certain degree of pollution to the environment
[0007] According to the latest literature reports, a new type of warm cloud catalyst is better than cement, salt, diatomite, urea and other materials used in the past in terms of moisture absorption capacity and water absorption speed. The new type of warm cloud catalyst is a crystalline aluminosilicate compound. Belonging to type A molecular sieve, this type of molecular sieve has a unique pore structure and a large specific surface area, and has a strong adsorption capacity, but its adsorption of water molecules is essentially physical adsorption, which cannot inhibit the secondary evaporation of water molecules
[0008] In summary, a hygroscopic catalyst with a single composition and structure cannot meet the needs of warm cloud catalysis operations. Therefore, the present invention combines a variety of materials to develop a highly hygroscopic light porous particle warm cloud catalyst. The adsorption rate Fast, high moisture absorption rate, obvious effect of eliminating warm clouds, good anti-environmental interference ability, good thermal stability, non-toxic, non-volatile, non-flammable and explosive, low corrosion, good environmental safety, good biological safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] This implementation case is a highly hygroscopic light porous particle warm cloud catalyst, the proportion of its components is: 40% adsorption material, of which, 25% silica airgel, 15% oxidized starch; 55% Water-absorbing materials, including 40% inorganic salts (35% calcium chloride, 3% sodium chloride, 2% lithium chloride), 15% organic salts (10% potassium formate, 3% sodium formate, 2% calcium acetate); 3 % Moisture Evaporation Inhibitor, of which, 2% Long Chain Fatty Alcohol C 18 -OH, 1% short chain alcohol C 3 -OH; 2% surfactant, among them, 1% fatty alcohol polyoxyethylene ether (AEO-3), 1% fatty acid glyceride.

[0048] Its preparation process comprises the following steps:

[0049] The first step is to weigh C in proportion 18 -OH and C 3 -OH, add absolute ethanol, stir to dissolve, and prepare solution 1;

[0050] In the second step, weigh fatty alcohol polyoxyethylene ether (AEO-3) and fatty acid glyceride in proportion, add ethanol aqueous solution, an...

Embodiment 2

[0055] This implementation case is a highly hygroscopic light porous particle warm cloud catalyst, the proportion of its components is: 50% adsorption material, of which 20% silica airgel, 20% oxidized starch, 5% Type A molecular sieve, 5% bentonite; 45% water-absorbing material, of which, 30% inorganic salt (20% calcium chloride, 5% potassium chloride, 3% magnesium chloride, 2% sodium silicate), 15% organic salt (10% Potassium formate, 3% calcium acetate, 2% magnesium acetate); water evaporation inhibitor 2%, of which, 1.5% long chain fatty alcohol C 16 -OH, 0.5% short chain alcohol C 4 -OH; 3% surfactant, among them, 1.5% fatty alcohol polyoxyethylene ether (AEO-9), 1.5% alkyl glycoside.

[0056] Its preparation process comprises the following steps:

[0057] The first step is to weigh C in proportion 16 -OH and C 4 -OH, add absolute ethanol, stir to dissolve, and prepare solution 1;

[0058] In the first step, weigh fatty alcohol polyoxyethylene ether (AEO-9) and alkyl...

Embodiment 3

[0063] This implementation case is a highly hygroscopic light porous particle warm cloud catalyst, the proportion of its components is: 23% adsorption material, of which, 10% silica airgel, 8% oxidized starch, 5% Type A molecular sieve; 75% water-absorbing material, of which, 50% inorganic salt (40% calcium chloride, 5% lithium chloride, 5% potassium chloride), 25% organic salt (20% potassium formate, 3% sodium formate, 2 % magnesium acetate); 1% moisture evaporation inhibitor, of which, 0.8% long-chain fatty alcohol C 16 -OH, 0.2% short chain alcohol C 4 -OH; 1% surfactant, among them, 0.5% fatty alcohol polyoxyethylene ether (AEO-9), 0.5% alkyl glycoside.

[0064] Its preparation process comprises the following steps:

[0065] The first step is to weigh C in proportion 16 -OH and C 4 -OH, add absolute ethanol, stir to dissolve, and prepare solution 1;

[0066] In the first step, weigh fatty alcohol polyoxyethylene ether (AEO-9) and alkyl glycoside in proportion, add eth...

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Abstract

The invention discloses a high-hygroscopicity light porous particulate warm cloud fog catalyst, which is prepared from the following components in percentage by mass: 10% to 60% of an adsorption material, 30% to 80% of a water absorption material, 0.1% to 5% of a moisture evaporation inhibitor and 0.1% to 5% of a surfactant. By adopting a porous material adsorption technology, a water molecule absorption technology and a molecular resistance evaporation combined technology, a novel efficient warm cloud fog catalyst material which is light in weight, porous and high in catalytic activity is developed. The catalyst material can spontaneously and rapidly collect water molecules in air, achieve the effects of water abstraction, water retention and water locking, generate a phase change effectand release a large amount of chemical heat. Under the condition that the air humidity is not less than 10%, the secondary evaporation phenomenon cannot occur. The warm cloud mist catalyst can reducethe interfacial tension of condensed liquid drops, enhance the colliding efficiency of suspended small liquid drops, accelerate the particle size increase and sedimentation rate of the liquid drops, generate a remarkable dragging effect, inhibit and destroy ascending airflow in cloud, and achieve the effect of quickly eliminating warm cloud mist.

Description

technical field [0001] The invention relates to the technical field of weather modification catalysts, in particular to a highly hygroscopic light porous particulate warm cloud catalyst. Background technique [0002] my country has a vast territory and complex topography, and the distribution of foggy days varies greatly in different regions. In some areas, foggy days can reach more than 100 days a year. According to statistics in the past 20 years, the generation rate of warm fog in Beijing area of ​​my country is as high as 60%, which is much higher than that of cold fog. [0003] The catalytic mechanism of warm cloud and fog is different from that of cold cloud and fog. The main reason is that the spreading of the catalyst accelerates the process of moisture absorption and collision and improves the precipitation efficiency. Therefore, the warm cloud catalyst mainly consists of hygroscopic substances. [0004] The hygroscopic particles catalyzed by early warm clouds wer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70B01J35/10B01J35/02B01J35/00
CPCB01J29/7003B01J37/0045B01J35/50B01J35/60
Inventor 吴燕庞玲玲于浩
Owner TIANJIN UNIV OF SCI & TECH
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