Carbon molecular sieve for recovering nitrogen in flue gas as well as preparation method and application of carbon molecular sieve
A carbon molecular sieve and flue gas technology, used in separation methods, carbon preparation/purification, nitrogen purification/separation, etc., can solve the problems of single product performance and adsorbent description, and achieve strong anti-toxic ability and no performance degradation. , the effect of high diffusion coefficient
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[0032] A kind of carbon molecular sieve used for reclaiming nitrogen in flue gas provided by the invention, its preparation method comprises the following steps:
[0033] Step 1, crushing, drying and finely grinding the phenolic material to obtain a powdery material;
[0034] Step 2, mixing the powdery material with a binder and water in proportion, and extruding to obtain strips;
[0035] Step 3, under an inert gas atmosphere, carbonize the strip to obtain carbonized material;
[0036] Step 4, adding a pore-adjusting agent to the carbonized material, and repeatedly adjusting the pore, so that the pore diameters of the micropores are respectively 0.26-0.4nm (such as 0.26nm, 0.30nm, 0.32nm, 0.34nm, 0.37nm or 0.4nm) and 0.44nm. - Carbon molecular sieves with a normal distribution at 0.49nm (such as 0.44nm, 0.45nm, 0.46nm, 0.47nm, 0.48nm or 0.49nm).
[0037] It should be noted that the diameter of oxygen molecules in the exhaust gas of carbon dioxide is 0.346nm, the diameter of...
Embodiment 1
[0053] Crush and dry the scraps of flower mud until the water content is within 3%, and then finely grind them with a ball mill to obtain powdery materials with a particle size of 4-10 μm. Take 60 parts of powdery materials, 20 parts of coal tar and 20 parts of water according to the mass parts Mix and extrude to obtain cylindrical strips with a diameter of 1.5mm and a length of 4mm. Place the cylindrical strips in a heating furnace, raise the temperature to 310°C at a heating rate of 5°C / min, keep the temperature constant for 30min, and then pass it into Nitrogen, heat up to 830°C at a heating rate of 8°C / min, keep the temperature for 90 minutes, then use nitrogen to pass the pore-adjusting agent water into the furnace, and after 60 minutes of hole expansion, then pass the pore-adjusting agent benzene into the furnace to deposit and adjust the pores After 90 minutes, the pore size distribution test was carried out, and the pore size was adjusted repeatedly to adapt to the diam...
Embodiment 2
[0056] Crush and dry the flower mud leftovers until the water content is within 5%, and then finely grind them with a ball mill to obtain powdery materials with a particle size of 10-20 μm. Take 50 parts of powdery materials, 10 parts of liquid phenolic resin, and 10 parts by mass Mix coal tar, 10 parts of industrial starch and 20 parts of water, and extrude to obtain cylindrical strips with a diameter of 1.5mm and a length of 4mm. to 310°C, keep the temperature constant for 30 minutes, then feed nitrogen, raise the temperature to 830°C at a rate of 8°C / min, keep the temperature constant for 60 minutes, then pass the pore-regulating agent water into the furnace with nitrogen, and after 30 minutes of hole expansion, then add the pore-regulating agent benzene Pass it into the furnace, after depositing and adjusting the pores for 60 minutes, test the pore size distribution, adjust the pores repeatedly to make the pore diameters adapt to the diameters of oxygen molecules and carbon...
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