Preparation method of porous carbonized sawdust accumulation bed material based on alkali activation and application of porous carbonized sawdust accumulation bed material in solar desalination of seawater

A stacked bed and alkali activation technology, applied in chemical instruments and methods, carbon compounds, seawater treatment, etc., can solve the problems of high cost, complex manufacturing process, high price, etc., achieve strong hydrophilicity, reduce production costs, and high efficiency The effect of solar energy absorption capacity

Active Publication Date: 2021-02-19
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these materials are expensive, require complex manufacturing processes, and the cost required for large-scale applications is relatively high

Method used

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  • Preparation method of porous carbonized sawdust accumulation bed material based on alkali activation and application of porous carbonized sawdust accumulation bed material in solar desalination of seawater
  • Preparation method of porous carbonized sawdust accumulation bed material based on alkali activation and application of porous carbonized sawdust accumulation bed material in solar desalination of seawater
  • Preparation method of porous carbonized sawdust accumulation bed material based on alkali activation and application of porous carbonized sawdust accumulation bed material in solar desalination of seawater

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Experimental program
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Effect test

Embodiment 1

[0035] A preparation method based on alkali-activated porous carbonized sawdust packed bed material, comprising the following steps:

[0036] (1) Collect wood chips produced by processing wood, and obtain wood chips with a particle size of about 100 μm after screening;

[0037] (2) Weigh about 4g of sawdust, put the sawdust into the cold-pressing mold; press the sawdust to shape with a pressure of 40MPa, and hold the pressure for 150s;

[0038] (3) Place the stacked bed of sawdust obtained in step (2) in a tube furnace, sinter in a vacuum environment at a temperature of 180°C for 25 minutes, and the temperature rise rate of the tube furnace is 8°C / min to obtain a bonded piled wood chips bed;

[0039] (4) Soak the bonded sawdust stacked bed obtained in step (3) in 0.04g / mL KOH ethanol solution for 12 minutes, filter, then wash excess KOH with ethanol and deionized water respectively, and place in a vacuum-dried box dry;

[0040] (5) Vacuum carbonize the sample obtained in st...

Embodiment 2

[0042] A preparation method based on alkali-activated porous carbonized sawdust packed bed material, comprising the following steps:

[0043] (1) Collect wood chips produced by processing wood, and obtain wood chips with a particle size of about 100 μm after screening;

[0044] (2) Weigh about 4g of sawdust, put the sawdust into the cold pressing mold; press the sawdust to shape by 40MPa pressure, and hold the pressure for 100s;

[0045] (3) Place the stacked bed of sawdust obtained in step (2) in a tube furnace, and sinter for 15 minutes in a vacuum environment at a temperature of 250°C. The temperature rise rate of the tube furnace is 5°C / min to obtain a bonded piled wood chips bed;

[0046] (4) Place the bonded sawdust stacked bed obtained in step (3) in 0.1g / ml KOH ethanol solution and soak for 6 minutes, filter, then wash the excess KOH with ethanol and deionized water respectively, and place in a vacuum-dried box dry;

[0047] (5) Vacuum carbonize the sample obtained ...

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Abstract

The invention discloses a preparation method of a porous carbonized sawdust accumulation bed material based on alkali activation and an application of the porous carbonized sawdust accumulation bed material in solar desalination of seawater, wherein the method comprises the steps: collecting sawdust, screening, weighing a certain mass of sawdust, putting the sawdust into a mold, and carrying out cold press molding to obtain a porous sawdust accumulation bed; and then putting the porous sawdust accumulation bed into a quartz tube furnace for vacuum sintering, putting the sintered sawdust accumulation bed into a potassium hydroxide ethanol solution, soaking for 5-15 minutes, washing, drying, and then putting into the tube furnace, carrying out vacuum carbonization, and thus obtaining the product. Sawdust waste generated by wood processing is utilized, a photothermal conversion material is prepared on the basis of sawdust, the advantages of being low in cost, simple in manufacturing process, capable of achieving large-scale production and the like are achieved, and after alkali activation treatment, the porous sawdust accumulation bed has extremely high hydrophilic capacity and can rapidly convey water to the evaporation surface, and ensures efficient solar seawater desalination.

Description

technical field [0001] The invention relates to the fields of solar photothermal conversion and seawater desalination, in particular to a preparation method based on alkali-activated porous carbonized sawdust accumulation bed material and its application in solar desalination of seawater. Background technique [0002] Freshwater scarcity is considered one of the greatest global challenges of our time. At present, various measures have been taken to meet the increasing demand for water resources, among which desalination of seawater is an important measure to alleviate the shortage of fresh water resources. The comprehensive utilization of seawater resources by utilizing solar energy for seawater desalination has important economic and social benefits, and has a broad market prospect, which is of great significance to the sustainable development of human society. [0003] Conventional solar desalination methods usually use volumetric absorbers such as nanoparticles to direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/348C02F1/14C02F103/08
CPCC01B32/324C01B32/348C02F1/14C02F2103/08Y02A20/212Y02A20/124Y02A20/142
Inventor 黄丛亮吴东旭
Owner CHINA UNIV OF MINING & TECH
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