High-performance mesoporous-micro double hole controllable molecular sieve adsorbent and preparation and application thereof

Abstract

The invention belongs to the technical field of air pollution control and particularly relates to high-performance mesoporous-micro double hole controllable molecular sieve adsorbent and preparation and application thereof. The preparation method includes the following steps that a silicon source, an aluminium source, a microporous structure guide agent, a mesoporous template agent, organosilane and water serve as raw materials for synthesizing mother liquor, the mother liquor assists into a hydrothermal reaction through microwaves, a product obtained through the reaction is subjected to centrifugation, drying and calcinations, and the high-performance mesoporous-micro double hole controllable molecular sieve adsorbent is obtained. According to the high-performance mesoporous-micro double hole controllable molecular sieve adsorbent and preparation and application thereof, an efficient method is utilized for preparing a mesoporous type zeolite molecular sieve which is high in specific surface, high in pore volume and high in adsorptive property, the synthesis time is greatly shortened, and the synthesis process is simplified. The synthesized zeolite type molecular sieve adsorbent is of a hierarchical pore structure, the pore diameter is adjustable, the mass transfer resistance is small, high adsorptive property of VOCs is achieved, high hydrophobic property and hydrothermal stability are achieved, and the high-performance mesoporous-micro double hole controllable molecular sieve adsorbent has high application value in the field of VOCs processing technologies.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and in particular relates to a high-performance mesomicro double-pore controllable molecular sieve adsorbent and its preparation and application. Background technique [0002] Volatile Organic Compounds (Volatile Organic Compounds, VOCs) refer to organic compounds with a saturated vapor pressure greater than 70Pa at normal temperature and a boiling point within 260°C at normal pressure. VOCs are a common air pollutant, mainly from printing, painting, pharmaceutical, furniture manufacturing and petrochemical industries. Most of these organic waste gases are flammable and explosive, and are often accompanied by peculiar smell and stench in the air. At low solubility, they can irritate human eyes, nose, and respiratory system, and even induce human cancer and mutation. [0003] With the enhancement of people's awareness of environmental protection, the emission standards of air pollut...

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Problems solved by technology

Activated carbon is currently the most widely used adsorbent, but its flammability limits the adsorption performance of activated carbon under high temperature conditions; silica gel has a high adsorption capacity for VOCs under dry conditions, but due to its hydrophilic nature, it is difficult Under industrial conditions, the adsorption capacity of VOCs is greatly reduced

Patent 201110006599.6 discloses an organic resin with super adsorption properties for organic matter, but the nature of the organic matter is limited, and this adsorbent can only be used at lower temperatures; patent 01126842.5 utilizes the properties of diatomaceous earth with high porosity and high specific surface area A fly ash-based adsorbent was synthesized. Although it has a certain adsorption capacity for VOCs, the synthesis time is long and the energy consumption is high, which is not conducive to industrial application.

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