Preparation method of SCM-15 molecular sieves and application of molecular sieves to adsorption of volatile organic gas

A volatile organic and gas adsorption technology, which is applied in the field of preparation of SCM-15 molecular sieve, can solve the problems of less research on the application of VOCs adsorption, and achieve the effect of high solid phase yield, good adsorption effect and large specific surface area

Inactive Publication Date: 2019-12-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are reports on the synthesis of SCM-15 molecular sieves, but there are few

Method used

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  • Preparation method of SCM-15 molecular sieves and application of molecular sieves to adsorption of volatile organic gas
  • Preparation method of SCM-15 molecular sieves and application of molecular sieves to adsorption of volatile organic gas
  • Preparation method of SCM-15 molecular sieves and application of molecular sieves to adsorption of volatile organic gas

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Preparation process of SCM-15 molecular sieve: Weigh 4.55g of template agent and 1.05g of germanium dioxide respectively, dissolve them in 4ml of deionized water, stir well until completely dissolved; weigh 7.5g of silica sol and add to the above solution drop by drop, at room temperature Stir for 30 minutes, then add 0.73 g of tetrahydrofuran, and stir thoroughly for 30 minutes to obtain a mixed solution; weigh 1.5 g of hydrofluoric acid and slowly add to the above mixed solution, and stir for 1 hour to obtain a uniform gel mixture. The obtained homogeneous gel mixture was transferred to a stainless steel autoclave with a polytetrafluoroethylene liner, and crystallized at 180 ° C for 6 days under static conditions; naturally cooled to room temperature, the solid phase product was recovered by filtration, and the Washed with deionized water several times, then dried overnight at 100°C, and finally calcined in a muffle furnace at 550°C for 5 hours to finally obtain SCM-15...

Embodiment 2

[0025] The basic steps for the preparation of SCM-15 molecular sieve are the same as in Example 1, except that the molar ratio of tetrahydrofuran to silicon dioxide is changed from 0.2 to 0.5 and 0.9, and finally SCM-15 molecular sieve is obtained.

Embodiment 3

[0027] The basic steps for the preparation of SCM-15 molecular sieve are the same as in Example 1, except that the crystallization condition is changed from crystallization at 180°C for 6 days to crystallization at 160°C for 6 days, and finally SCM-15 molecular sieve is obtained.

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Abstract

The invention discloses a preparation method of SCM-15 molecular sieves and application of the SCM-15 molecular sieves to adsorption of volatile organic gas. The preparation method comprises the stepsof firstly, adding a template agent and a germanium source into deionized water, fully stirring, then adding a silicon source into the solution, stirring for a certain time, then adding tetrahydrofuran, and continuously stirring to form a mixed solution; adding hydrofluoric acid slowly and stirring fully until a homogeneous gel mixture is formed; and transferring the obtained mixture into a high-pressure reaction kettle, crystallizing at a certain temperature for a period of time, cooling at the room temperature after crystallization is finished, washing and drying the solid-phase product bydeionized water, and roasting in air at the temperature of 550 DEG C to obtain the SCM-15 molecular sieves. The prepared SCM-15 molecular sieves are used for carrying out adsorption test on gaseous volatile organic compounds, a certain amount of the SCM-15 molecular sieves are weighed and fed into a reactor, the adsorption performance is tested and evaluated through a dynamic adsorption method, the gas concentration is detected through gas chromatography, and the influence of different adsorption reaction conditions on the adsorption performance is explored.

Description

technical field [0001] The invention belongs to the field of molecular sieve synthesis and adsorption application, and relates to a preparation method of SCM-15 molecular sieve and the application of the molecular sieve to adsorption of volatile organic gases. Background technique [0002] Volatile organic compounds (VOCs) refer to the general term of volatile organic compounds whose melting point is lower than room temperature and boiling point is between 50 and 260°C. They are widely distributed in air, soil, and water. Substituted hydrocarbons, aromatic hydrocarbons, ketones, esters, etc. It mainly comes from industrial sources, mobile sources, and domestic sources. In recent years, the emission of VOCs has been showing an increasing trend. There are complex types of VOCs, which seriously harm the nervous and immune systems of the human body, cause respiratory infections, neurological disorders, etc., and may also cause cancer, teratogenicity, and mutagenesis. In additio...

Claims

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Application Information

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IPC IPC(8): C01B39/48B01J20/18B01D53/02B01J20/30
CPCC01B39/48B01J20/18B01D53/02
Inventor 刘庆岭吕双春李慧莹郭淼史佳琦宋春风
Owner TIANJIN UNIV
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