Core-shell type VOCs adsorbent and preparation method thereof
A technology of adsorbent and core-shell type, applied in the field of core-shell VOCs adsorbent and its preparation, can solve the problems of short service life, easy deactivation and poisoning of adsorbent
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Embodiment 1
[0034] see figure 1 , the present invention provides a technical solution: a core-shell VOCs adsorbent, the core-shell VOCs adsorbent has a core-shell structure and is prepared from the following raw materials:
[0035] Core-shell VOCs adsorbent, which uses Ce-Ti-Mg-Al-Ox composite oxide as the core and Si-Ca-Zn-Ox composite oxide as the shell to obtain a VOCs-removing adsorbent with a core-shell structure;
[0036] The molar ratio of cerium, titanium, magnesium, and aluminum elements is 1:(0.5):(0.5):(0.5); the molar ratio of silicon, calcium, and zinc elements is 1:(0.5):(0.5).
[0037] The present invention also provides a preparation method of a core-shell type VOCs adsorbent, comprising the following steps:
[0038] S1. Preparation of adsorbent "core": Weigh cerium nitrate, titanium sulfate, magnesium oxide and aluminum nitrate into a 500ml beaker, slowly add deionized water into the beaker, stir on a mixer, and carry out after the reaction is completed. Heating and agi...
experiment example 1
[0051] 1. Using cerium nitrate, titanium sulfate, magnesium oxide and aluminum nitrate as raw materials, prepare a 500ml mixed solution with a molar ratio of cerium, titanium, magnesium and aluminum elements of 1:0.1:0.1:0.1. Stir on a mixer at a speed of 140 rpm, the stirring temperature is 30° C., and the stirring time is 30 min. After the stirring was completed, the temperature was raised to 80°C, left to age for 3 hours, the slurry was suction filtered, the obtained solid was washed three times with distilled water, and finally dried in an oven at 50°C for 4 hours, the obtained Ce-Ti-Mg-Al-Ox composite oxidation object core.
[0052] 2. Weigh 15g of Ce-Ti-Mg-Al-Ox composite oxide, put it into a 100ml beaker, and add 35g of deionized water (the mass ratio of deionized water to composite oxide is 7:3). Stir at a speed of 100 rpm and a temperature of 30°C for 20 minutes to obtain a sample A with a certain viscosity.
[0053] 3. Weigh 2.5g of citric acid and 2.5g of sodium h...
experiment example 2
[0070] 1. Using cerium nitrate, titanium sulfate, magnesium oxide and aluminum nitrate as raw materials, prepare a 500ml mixed solution with a molar ratio of cerium, titanium, magnesium and aluminum elements of 1:0.25:0.25:0.25. Stir on a mixer at a speed of 300 rpm, the stirring temperature is 60° C., and the stirring time is 50 min. After the stirring was completed, the temperature was raised to 83°C, left to age for 4 hours, the slurry was suction filtered, the obtained solid was washed three times with distilled water, and finally dried in an oven at 60°C for 5 hours, the obtained Ce-Ti-Mg-Al-Ox composite oxidation object core.
[0071] 2. Weigh 15g of Ce-Ti-Mg-Al-Ox composite oxide, put it into a 100ml beaker, and add 33g of deionized water (the mass ratio of deionized water to composite oxide is 7:3.2). Stir at a speed of 125 rpm and a temperature of 40°C for 30 minutes to obtain a sample A with a certain viscosity.
[0072] 3. Weigh 2.88g of simethicone oil and 2.88g ...
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