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Zeolite molecular sieve-heat conducting framework composite adsorbent and preparation method

A zeolite molecular sieve and composite adsorption technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problem of inability to overcome the microscopic heat transfer capacity of zeolite molecular sieves, the ineffective separation of force desorption capabilities, and the inability to effectively adsorb VOCs molecules. and other issues, to achieve the effect of increasing thermal conductivity and mass transfer performance, good crystallinity and purity, and reducing the decline in zeolite performance

Active Publication Date: 2017-05-17
SUZHOU RES INST SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, more zeolite molecular sieve-catalyst composite adsorption materials are mainly focused on reducing the conversion temperature of VOCs and improving the degradation efficiency of VOCs, which is conducive to reducing the use of composite adsorbents, and cannot overcome the microscopic heat transfer of zeolite molecular sieve itself. Poor capacity, incomplete desorption of VOCs and other phenomena, for example, the heat in the desorption process cannot be effectively transferred to the inside of the molecular sieve, and the intermolecular force between the zeolite molecular sieve structure and VOCs cannot be effectively separated due to insufficient desorption capacity, resulting in some VOCs remaining in the zeolite molecular sieve structure , in the process of sequential adsorption again, the subsequent VOCs molecules cannot be effectively adsorbed, reducing the adsorption amount under the same working conditions and reducing the mass transfer efficiency

Method used

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  • Zeolite molecular sieve-heat conducting framework composite adsorbent and preparation method
  • Zeolite molecular sieve-heat conducting framework composite adsorbent and preparation method
  • Zeolite molecular sieve-heat conducting framework composite adsorbent and preparation method

Examples

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Embodiment 1

[0045] First weigh 0.375g of sodium hydroxide and 3.21g of sodium chloride, dissolve them in 20ml of deionized water, then add 1.84g of sodium silicate, and stir them into a uniform colloid with a magnetic stirrer to obtain A solution; then weigh 1.71g Aluminum sulfate, put in a 100ml beaker, add 10ml of deionized water, stir to dissolve, then add 0.5g of expanded graphite, stir until the expanded graphite is completely mixed with the solution to form a cloudy solution of B; add solution A dropwise to the stirring B In the turbid liquid, stir for 10 minutes until it is uniform, then add 1.36ml of ethylenediamine, stir evenly, and test the pH value of the mixed colloid with pH test paper. Put the gelled mixture into a polytetrafluoroethylene kettle jacket, then put it into a stainless steel reaction kettle, tighten the lid of the kettle, put it in an electric thermostat, age at 100°C for 24 hours, crystallize at 160°C for 30 hours, take it out . After cooling to room temperatu...

Embodiment 2

[0048] First weigh 0.375g of sodium hydroxide and 3.21g of sodium chloride, dissolve them in 20ml of deionized water, then add 1.84g of sodium silicate, and stir them into a uniform colloid with a magnetic stirrer to obtain A solution; then weigh 1.71g Aluminum sulfate, put in a 100ml beaker, add 10ml of deionized water, stir to dissolve; add solution A dropwise to solution B which is being stirred, stir for 10min until uniform, then add 1.36ml of ethylenediamine, stir evenly to form a gel solution, add 0.5g copper powder in the process of continuing to stir, stir evenly, and test the pH value of the mixed colloid with PH test paper. Put the gelled mixture into a polytetrafluoroethylene kettle jacket, and then put it in an electric thermostat at 100°C to stir and heat to evaporate the water. After the belt is completely evaporated, put the gel into a vacuum sintering furnace for sintering at 700°C Sinter for 15 minutes, cool to ambient temperature and take out. A zeolite mole...

Embodiment 3

[0051] First weigh 0.375g of sodium hydroxide and 3.21g of sodium chloride, dissolve them in 20ml of deionized water, then add 1.71g of aluminum sulfate, stir with a magnetic stirrer to form a uniform colloid, and prepare A solution; then weigh 1.84g of silicon Sodium acid, take 1.36ml of ethylenediamine, put it in a 100ml beaker, add 10ml of deionized water, stir to dissolve, then add 0.5g of expanded graphite, and stir until the expanded graphite is completely mixed with the solution to form a cloudy solution of B; Add it dropwise to the stirring B turbid solution, stir evenly, and test the pH value of the mixed colloid with pH test paper. Put the gelled mixture into a polytetrafluoroethylene kettle jacket, then put it into a stainless steel reaction kettle, tighten the lid of the kettle, put it in an electric thermostat, age at 100°C for 24 hours, crystallize at 160°C for 30 hours, take it out . After cooling to room temperature with water, the product is washed and filter...

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Abstract

The invention discloses a zeolite molecular sieve-heat conducting framework composite adsorbent and a preparation method. According to the method, raw materials for preparing a zeolite molecular sieve and heat-conducting framework materials are uniformly mixed to generate reaction gel, and the zeolite molecular sieve-heat conducting framework composite adsorbent is prepared by a hydrothermal crystallization method. The porous composite zeolite molecular sieve adsorbent is synthesized by a heat-conducting framework, so that the heat transfer capability of the composite adsorbent is improved, efficient heat transfer is ensured; the problems of high desorption temperature and low mass transfer efficiency of the zeolite molecular sieve are solved, the charge capacity of the zeolite molecular sieve in VOCs (Volatile Organic Compounds) adsorption and / desorption utilization efficiency are increased remarkably; moreover, the preparation method is simple and efficient, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a zeolite molecular sieve-heat-conducting framework composite adsorbent and a preparation method thereof, belonging to the technical fields of material preparation and environmental protection. Background technique [0002] The innovation and development of science and technology in various fields in the world have promoted the rapid development of the world economy, and also caused environmental and natural resource crises. VOCs (volatile organic compounds) pollution has become one of the major environmental problems facing human survival and development. Seriously endanger human health and ecological balance. At present, the methods for purifying VOCs mainly include thermal oxidation catalysis, plasma separation, liquid absorption, photocatalytic oxidation, biomass degradation, and adsorption-desorption catalysis. [0003] In traditional related technologies, the effect of adsorption and purification is better. As an effecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/18B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2257/708B01J20/0203B01J20/0229B01J20/0233B01J20/0237B01J20/18B01J20/20Y02A50/20
Inventor 赖艳华董震魏露露魏坤浩吕明新
Owner SUZHOU RES INST SHANDONG UNIV
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