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A highly hygroscopic lightweight porous particulate warm cloud catalyst

A porous particle and high moisture absorption technology, which is applied in molecular sieve catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the unsatisfactory effect of reducing warm clouds and fog, can not inhibit the secondary evaporation of water molecules, and the catalytic effect of warm clouds and fog Inconspicuous and other problems, to achieve the effect of good evaporation suppression ability, good anti-environmental interference ability, and enhanced collision efficiency

Active Publication Date: 2022-07-19
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 example is a highly hygroscopic lightweight porous particle warm cloud catalyst. The proportion of its components is: 40% adsorption material, of which 25% silica aerogel, 15% oxidized starch; 55% Water-absorbing material, wherein, 40% inorganic salt (35% calcium chloride, 3% sodium chloride, 2% lithium chloride), 15% organic salt (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, wherein, 1% fatty alcohol polyoxyethylene ether (AEO-3), 1% fatty acid glyceride.

[0048] Its preparation process includes the following steps:

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

[0050] In the second step, the fatty alcohol polyoxyethylene ether (AEO-3) and fatty acid glycerides were weighed in proportion, and an aqueous ethanol solution w...

Embodiment 2

[0055] This example is a highly hygroscopic lightweight porous particle warm cloud catalyst, the proportion of each component is: 50% adsorption material, of which 20% silica aerogel, 20% oxidized starch, 5% Type A molecular sieve, 5% bentonite; 45% water-absorbing material, including 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 which, 1.5% fatty alcohol polyoxyethylene ether (AEO-9), 1.5% alkyl glycoside.

[0056] Its preparation process includes the following steps:

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

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

Embodiment 3

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

[0064] Its preparation process includes the following steps:

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

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

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Abstract

The invention discloses a highly hygroscopic lightweight porous particle warm cloud catalyst. The warm cloud catalyst, in terms of mass percentage, is composed of the following components: 10%-60% of adsorption material, 30%-80% of water absorbing material, and water evaporation. Inhibitor 0.1%-5%, surfactant 0.1%-5%. The invention adopts the combined technology of porous material adsorption technology, water molecule absorption technology and molecular resistance evaporation technology to develop a new type of light-weight porous, high catalytic activity new-type high-efficiency warm cloud and fog catalyst material, which can spontaneously and quickly collect water molecules in the air to produce " Water capture"-"water-holding"-"water locking" effect, and a phase change effect occurs, releasing a large amount of chemical heat; when the air humidity is not less than 10%, secondary evaporation will not occur; the warm cloud catalyst can Reduce the interfacial tension of agglomerated droplets, enhance the collision efficiency of suspended small droplets, accelerate the growth of droplet size and sedimentation rate, produce a significant drag effect, inhibit and destroy the updraft in the cloud, and achieve rapid elimination of warm clouds and fog Effect.

Description

technical field [0001] The invention relates to the technical field of artificial weather modification catalysts, in particular to a highly hygroscopic lightweight porous particle warm cloud catalyst. Background technique [0002] my country has a vast territory and complex terrain, and the distribution of foggy days in different regions varies greatly. In some areas, foggy days can reach more than 100 days in a year. According to the statistics of the past 20 years, the generation rate of warm fog in Beijing is as high as 60%, which is much higher than that of cold fog. [0003] The catalytic mechanism of warm cloud fog is different from that of cold fog fog. Therefore, the warm cloud catalyst is mainly composed of hygroscopic substances. [0004] The hygroscopic particles of early warm cloud catalytic sowing were mainly salt, but due to the difficulty in controlling the particle size of the sowing salt powder and the limitation of the aircraft carrying capacity, there wa...

Claims

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Application Information

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Patent Type & Authority Patents(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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