Application of Hierarchically Porous Carbon Blocks as Adsorption/Recovery Materials for Oily Organics
A technology of bulk materials and recycled materials, applied in the direction of alkali metal oxides/hydroxides, inorganic chemistry, alkali metal compounds, etc., can solve the problem of expensive reagents, expensive equipment, complex synthesis processes, and unsatisfactory ideal adsorbents and other problems, to achieve the effect of low cost and simple process
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Embodiment 1
[0046] Weigh a certain amount of P123 into a beaker, add appropriate amount of hydrochloric acid and water to make the molar concentration of hydrochloric acid 1.49M, put the beaker into a 37°C water bath and stir to dissolve the P123; Add a certain amount of tetraethyl orthosilicate under stirring, so that the molar ratio of the substances in the solution is: SiO 2 :P123:HCl:H 2 O=1.00:0.016:5.00:180, continue to stir for 5 minutes, immediately transfer the sol into a hydrothermal kettle and place it in a constant temperature oven at 120°C for 24 hours, and wash the obtained block with distilled water and keep it at a constant temperature of 100°C Dry in an oven overnight, and then calcinate in a muffle furnace at 550°C for 6 hours to remove the surfactant P123, and obtain the matrix-mesoporous / macroporous hierarchically porous silica block SBA-15-m. The obtained parent silicon oxide blocks were immersed in furfuryl alcohol / ethanol solution containing oxalic acid overnight, ...
Embodiment 2
[0055] Place the blocks C-5%-m, C-7.5%-m, C-10%-m, C-20%-m and C-30%-m prepared in Example 1 in gasoline for about 20 seconds After taking it out, absorb the gasoline on the surface of the block with weighing paper, weigh the mass of the block before and after adsorption, and use the formula Q e (%)=(W e –W 0 )×100 / W 0 (Q e is the adsorption capacity of the material for gasoline at equilibrium, W 0 and W e are the mass of the block before and after adsorption) to calculate the adsorption capacity of the material for gasoline. As a comparison, mesoporous material CMK-3 and activated carbon AC were also used as gasoline adsorbents. The adsorption capacity of each material to gasoline is shown in Figure 7 , and the volume of gasoline absorbed is in good agreement with the pore volume of the material's macropores, among which block C-5%-m has the highest adsorption capacity (33 times its own mass).
Embodiment 3
[0057] Place the block C-5%-m prepared in Example 1 in other reagents such as soybean oil, biodiesel, pump oil, toluene and carbon tetrachloride for 20 seconds, then take it out, and suck off the surface of the block with weighing paper Adsorbed reagent, weigh the mass of the block before and after adsorption, and use the formula Q e (%)=(W e –W 0 )×100 / W 0 (Q e For the adsorption capacity of the block C-5%-m to each reagent when reaching equilibrium, W 0 and W e are the mass of the block before and after adsorption respectively) to calculate the adsorption capacity of block C-5%-m for these reagents, the results are shown in Figure 8 , it was found that the adsorption capacity of block C-5%-m for these reagents was 23-48 times its own mass).
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