Hydrophobic efficient VOC molecular sieve adsorbent and preparation method thereof

Abstract

The invention relates to the technical field of adsorbents and preparation thereof, in particular to a hydrophobic efficient VOC (volatile organic compound) molecular sieve adsorbent and a preparation method thereof, and provides the following scheme aiming at the problems that an existing adsorbent and a preparation technology thereof still have low regeneration efficiency and the adsorption capacity is obviously reduced after the adsorbent is repeatedly used for multiple times. The preparation method of the hydrophobic high-efficiency VOC molecular sieve adsorbent comprises the following steps: S1, raw material preparation, S2, mixing and stirring, and S3, roasting and desorption, and aims to prepare the hydrophobic high-efficiency VOC molecular sieve adsorbent by taking a ZSM-5 molecular sieve as a base material, adopting a physical mixing mode, adding molecular sieves of other models, regulating the silica-alumina ratio of the molecular sieves and the like. The high-efficiency VOC adsorbent is obtained, the adsorbability to benzene series is improved, the adsorbability to water is reduced, the adsorbent is very suitable for removing industrial organic waste gas, meanwhile, low-temperature desorption is adopted, the regeneration efficiency of the adsorbent is high, and the adsorption is not obviously reduced after the adsorbent is repeatedly used for multiple times.

Description

technical field

[0001] The invention relates to the technical field of adsorbents and their preparation, in particular to a hydrophobic high-efficiency VOC molecular sieve adsorbent and a preparation method. Background technique

[0002] Adsorbents generally have the following characteristics: large specific surface, suitable pore structure and surface structure; strong adsorption capacity for adsorbate; generally do not chemically react with adsorbate and medium; easy to manufacture and easy to regenerate; excellent Adsorptive and mechanical properties. Adsorbents can be classified according to pore size, particle shape, chemical composition, surface polarity, etc., such as coarse-pore and fine-pore adsorbents, powdery, granular, strip-shaped adsorbents, carbonaceous and oxide adsorbents, polar and non-polar polar adsorbents, etc. Commonly used adsorbents include various activated carbon adsorbents based on carbonaceous materials and metal and non-metal oxide adsorbents (...

Examples

Embodiment 1

[0024] refer to figure 1 , the present invention proposes a hydrophobic high-efficiency VOC molecular sieve adsorbent, including the following raw materials in parts by weight: 95 parts of ZSM-5 molecular sieve, 45 parts of Beta molecular sieve, 45 parts of 13X molecular sieve, 50 parts of Y-type molecular sieve, 35 parts of silicon, aluminum 15 copies;

[0025] Its preparation method comprises the following steps:

[0026] S1: Raw material preparation: ZSM-5 molecular sieve with MFI structure is selected as the main material of the adsorption material, and the silicon-aluminum ratio of the molecular sieve with a mass percentage of 50% is selected as 23. In order to improve the hydrophobicity of the adsorbent, the silicon-aluminum ratio ∞ is preferred Pure silicon molecular sieves, and add Beta molecular sieves, 13X molecular sieves and Y-type molecular sieves, wherein the addition volume ratio of the Beta molecular sieves, 13X molecular sieves and Y-type molecular sieves is ...

Embodiment 2

[0031] refer to figure 1 , the present invention proposes a hydrophobic high-efficiency VOC molecular sieve adsorbent, including the following raw materials in parts by weight: 98 parts of ZSM-5 molecular sieve, 48 parts of Beta molecular sieve, 48 parts of 13X molecular sieve, 56 parts of Y-type molecular sieve, 45 parts of silicon, aluminum 15 copies;

[0032] Its preparation method comprises the following steps:

[0033] S1: Raw material preparation: ZSM-5 molecular sieve with MFI structure is selected as the main material of the adsorption material, and the silicon-aluminum ratio of the molecular sieve with a mass percentage of 80% is selected as ∞, and Beta molecular sieve, 13X molecular sieve and Y-type molecular sieve are added. The added volume ratio of Beta molecular sieve, 13X molecular sieve and Y-type molecular sieve is 3:3:2, and the ratio of molecular sieve is controlled by mass percentage, and the mass percentage of added components accounts for 50% of the tota...

Embodiment 3

[0038] refer to figure 1 , the present invention proposes a hydrophobic high-efficiency VOC molecular sieve adsorbent, including the following raw materials in parts by weight: 100 parts of ZSM-5 molecular sieve, 50 parts of Beta molecular sieve, 50 parts of 13X molecular sieve, 60 parts of Y-type molecular sieve, 50 parts of silicon, aluminum 20 copies;

[0039] Its preparation method comprises the following steps:

[0040] S1: Raw material preparation: ZSM-5 molecular sieve with MFI structure is selected as the main material of the adsorption material, and the silicon-alumina ratio of the molecular sieve with a mass percentage of 60% is selected as 55. In order to improve the hydrophobicity of the adsorbent, the silicon-aluminum ratio ∞ is preferred Pure silicon molecular sieves, and add Beta molecular sieves, 13X molecular sieves and Y-type molecular sieves, wherein the addition volume ratio of the Beta molecular sieves, 13X molecular sieves and Y-type molecular sieves is ...

technical field

[0001] The invention relates to the technical field of adsorbents and their preparation, in particular to a hydrophobic high-efficiency VOC molecular sieve adsorbent and a preparation method. Background technique

[0002] Adsorbents generally have the following characteristics: large specific surface, suitable pore structure and surface structure; strong adsorption capacity for adsorbate; generally do not chemically react with adsorbate and medium; easy to manufacture and easy to regenerate; excellent Adsorptive and mechanical properties. Adsorbents can be classified according to pore size, particle shape, chemical composition, surface polarity, etc., such as coarse-pore and fine-pore adsorbents, powdery, granular, strip-shaped adsorbents, carbonaceous and oxide adsorbents, polar and non-polar polar adsorbents, etc. Commonly used adsorbents include various activated carbon adsorbents based on carbonaceous materials and metal and non-metal oxide adsorbents (...

Examples

Embodiment 1

[0024] refer to figure 1 , the present invention proposes a hydrophobic high-efficiency VOC molecular sieve adsorbent, including the following raw materials in parts by weight: 95 parts of ZSM-5 molecular sieve, 45 parts of Beta molecular sieve, 45 parts of 13X molecular sieve, 50 parts of Y-type molecular sieve, 35 parts of silicon, aluminum 15 copies;

[0025] Its preparation method comprises the following steps:

[0026] S1: Raw material preparation: ZSM-5 molecular sieve with MFI structure is selected as the main material of the adsorption material, and the silicon-aluminum ratio of the molecular sieve with a mass percentage of 50% is selected as 23. In order to improve the hydrophobicity of the adsorbent, the silicon-aluminum ratio ∞ is preferred Pure silicon molecular sieves, and add Beta molecular sieves, 13X molecular sieves and Y-type molecular sieves, wherein the addition volume ratio of the Beta molecular sieves, 13X molecular sieves and Y-type molecular sieves is ...

Embodiment 2

[0031] refer to figure 1 , the present invention proposes a hydrophobic high-efficiency VOC molecular sieve adsorbent, including the following raw materials in parts by weight: 98 parts of ZSM-5 molecular sieve, 48 parts of Beta molecular sieve, 48 parts of 13X molecular sieve, 56 parts of Y-type molecular sieve, 45 parts of silicon, aluminum 15 copies;

[0032] Its preparation method comprises the following steps:

[0033] S1: Raw material preparation: ZSM-5 molecular sieve with MFI structure is selected as the main material of the adsorption material, and the silicon-aluminum ratio of the molecular sieve with a mass percentage of 80% is selected as ∞, and Beta molecular sieve, 13X molecular sieve and Y-type molecular sieve are added. The added volume ratio of Beta molecular sieve, 13X molecular sieve and Y-type molecular sieve is 3:3:2, and the ratio of molecular sieve is controlled by mass percentage, and the mass percentage of added components accounts for 50% of the tota...

Embodiment 3

[0038] refer to figure 1 , the present invention proposes a hydrophobic high-efficiency VOC molecular sieve adsorbent, including the following raw materials in parts by weight: 100 parts of ZSM-5 molecular sieve, 50 parts of Beta molecular sieve, 50 parts of 13X molecular sieve, 60 parts of Y-type molecular sieve, 50 parts of silicon, aluminum 20 copies;

[0039] Its preparation method comprises the following steps:

[0040] S1: Raw material preparation: ZSM-5 molecular sieve with MFI structure is selected as the main material of the adsorption material, and the silicon-alumina ratio of the molecular sieve with a mass percentage of 60% is selected as 55. In order to improve the hydrophobicity of the adsorbent, the silicon-aluminum ratio ∞ is preferred Pure silicon molecular sieves, and add Beta molecular sieves, 13X molecular sieves and Y-type molecular sieves, wherein the addition volume ratio of the Beta molecular sieves, 13X molecular sieves and Y-type molecular sieves is ...

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