A kind of preparation method of highly adsorptive coal-based briquette activated carbon
A high-adsorption, activated carbon technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve problems such as poor adsorption performance, and achieve the effects of improving adsorption performance, increasing yield, and reducing costs
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example 1
[0032] Mix and pulverize the blended coal consisting of 80wt% A coal, 10wt% B coal and 10wt% C coal in a mill, and pass the obtained coal powder through a 180-mesh sieve, and then send it into a briquette with a working pressure of 26MP The briquette is formed in the machine, screened after primary crushing and secondary crushing, and the qualified pellets are subjected to oxidation treatment, carbonization treatment and activation treatment in sequence. Oxidize the pellets at 230-250°C for 3 hours; the carbonization treatment conditions are: carbonize the material at 500-550°C for 2.5 hours in an electric heating external heating converter, and control the oxygen concentration in the atmosphere in the furnace The activation treatment conditions are as follows: use water vapor as the activation medium, activate the carbonized particles in the converter at 880-930°C for 5 hours, and the amount of water vapor used is 3.5 times the mass of the carbonized material to obtain activat...
Embodiment 2
[0037] The difference from Example 1 is that the raw coal contains 70 wt% of coal A, 15 wt% of coal B and 15 wt% of coal C. All the other are with embodiment 1. The indicators of the activated carbon produced are as follows:
[0038] Iodine value: 1152mg / g
[0039] Methylene blue: 230mg / g
[0040] Yield: 27%.
Embodiment 3
[0042] The difference from Example 1 is that the raw coal contains 60 wt% of coal A, 20 wt% of coal B and 20 wt% of coal C. All the other are with embodiment 1. The indicators of the activated carbon produced are as follows:
[0043] Iodine value: 1178mg / g
[0044] Methylene blue: 248mg / g
[0045] Yield: 23%.
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