Preparation method and application of novel modified hemp stalk biomass charcoal material
A biomass material and biochar technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve problems such as weak adsorption capacity and poor phosphate adsorption capacity, so as to improve adsorption performance and improve adsorption capacity. effect, the effect of increasing the amount of crystal facets
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Embodiment 1
[0033] The preparation and application of a novel modified hemp stalk biomass carbon material are as follows:
[0034] (1) Expose the harvested hemp stalks in the sun to remove the moisture in the hemp stalks, then wash them several times with deionized water, dry them in an oven at 80°C for 8 hours, and finally crush them into 20-mesh hemp with a crusher. Rod shavings.
[0035] (2) step (1) 1g hemp stalk crumbs is added in the 150mL Erlenmeyer flask, then adding 8.3mL concentration is 1mol / L magnesium chloride and 16.6mL concentration is 1mol / L sodium hydroxide solution, in the constant temperature shaking box 25 The reaction was shaken at ℃ for 24 hours, and after the reaction was completed, the biomass material with Mg(OH)2 surface modification was obtained by filtering, washing and drying.
[0036] (3) The dried Mg(OH)2 surface-modified biomass materials in step (2) were placed in a muffle furnace to raise the temperature to 450°C at a rate of 5°C / min, and the oxygen volu...
Embodiment 2
[0044] Example 2 (OH - :Mg 2+ Contrast when the molar ratio changes)
[0045] The preparation and application of a novel modified hemp stalk biomass carbon material are as follows:
[0046] (1) Expose the harvested hemp stalks in the sun to remove the moisture in the hemp stalks, then wash them several times with deionized water and then place them in an oven at 80°C to dry them, and finally crush them into 25-mesh hemp stalk chips with a crusher.
[0047] (2) step (1) 1g hemp stalk scraps are added in the 150mL Erlenmeyer flask, then adding concentration is the magnesium chloride of 1mol / L and 1mol / L sodium hydroxide solution, obtains by controlling the addition control of magnesium chloride and sodium hydroxide Different OH - :Mg 2+ The molar ratio of the reaction solution was shaken and reacted in a constant temperature shaking box at 25°C for 24h. After the reaction was completed, it was filtered, washed and dried to obtain Mg(OH) 2 Surface-modified biomass materials....
Embodiment 3
[0057] Embodiment 3 (different calcination temperature contrasts)
[0058] (1) Expose the harvested hemp stalks in the sun to remove moisture in the hemp stalks, dry them at low temperature after washing several times, and crush them into 30 mesh hemp stalk chips with a crusher.
[0059] (2) Add 1g of hemp stalk chips in step (1) to a 150mL conical flask, then add 1mol / L, 8.3mL of magnesium chloride and 1mol / L, 16.6mL of sodium hydroxide solution (OH-: Mg 2+ =2:1) Shake in a constant temperature shaking box at 25°C for 24h, filter, wash and dry to obtain Mg(OH) 2 Surface-modified biomass materials.
[0060] (3) Mg(OH) after step (2) is dried 2 The surface-modified biomass materials were placed in a muffle furnace and raised to 450°C-600°C at a heating rate of 5°C / min, and then aerobic carbonized and calcined for 3 hours at an oxygen volume concentration of 6% or placed in a tubular furnace. Nitrogen gas is introduced into the furnace (the speed of nitrogen gas introductio...
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