Efficient benzene VOCs gas adsorption molecular sieve and preparation method thereof

Abstract

The invention discloses anefficient benzene VOCs gas adsorption molecular sieve and a preparation method thereof. Molecular sieve slurry is composed of the following raw materials in parts by weight:2-4 parts of diatomite; 0.5-1.2 parts of attapulgite; 1.3-1.8 parts of kaolin; 1.3-1.8 parts of carbon powder; 0.5-1.2 part of ZSM-5 molecular sieve raw powder; and 4.2-6 parts of silica sol. The preparation method comprises the following steps of: soaking high-temperature-resistant powder with alkali liquor, washing the powder with water, and drying the powder to prepare a honeycomb mesh-shaped matrix; mixing the diatomite, attapulgite, kaolin, carbon powder and ZSM-5 molecular sieve raw powder, grinding the mixture into powder, sieving the powder, and uniformly mixing the powder with the silica sol aqueous solution to obtain slurry; immersing the surface of the honeycomb mesh-shaped matrix with the slurry, and obtaining a honeycomb carrier to which the slurry is attached after immersion;and drying the honeycomb carrier to which the slurry is attached, roasting the honeycomb carrier, and burning carbon powder after roasting, thereby greatly increasing the pores of the molecular sieve, and obtaining the efficient benzene VOCs gas adsorption molecular sieve. The molecular sieve provided by the invention has the characteristics of light specific gravity, small gas resistance, good adsorption effect on benzene VOCs, advanced pore system and recyclability.

Description

technical field [0001] The invention belongs to the technical field of molecular sieves, and in particular relates to a high-efficiency benzene series VOCs gas adsorption molecular sieve and a preparation method thereof. Background technique [0002] The existing molecular sieve synthesis technology has problems such as complex process, high energy consumption, high production cost, single function and poor performance of the prepared molecular sieve; The supply of silicon-containing and aluminum-containing raw materials and alkali is becoming increasingly tense, and the price is constantly rising. The preparation technology of molecular sieves is far from meeting the requirements of its increasingly broad application fields. These problems seriously restrict the development of molecular sieves. [0003] At present, there are many kinds of molecular sieve adsorbents in the industry. These molecular sieve products can be applied to the adsorption of various gas components acc...

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Problems solved by technology

However, these molecular sieve adsorbents are not ideal for the adsorption of benzene-based VOCs, and their internal pores are easily blocked by dust and water vapor, and will soon fail.

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