Preparation method of novel enteromorpha-based carbon material

A technology of carbon materials and carbon-based materials, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve problems such as Enteromorpha pollution and achieve the effect of increasing HHV value

Inactive Publication Date: 2014-12-24
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to avoid the deficiencies of the prior art and provide a solution to the pollution problem of Enteromorpha and CO 2 Emission issues, and use Enteromorpha as raw material to prepare Hydrochar and CO 2 Carbon-based adsorbent method, simple and effective

Method used

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  • Preparation method of novel enteromorpha-based carbon material
  • Preparation method of novel enteromorpha-based carbon material
  • Preparation method of novel enteromorpha-based carbon material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Mix 5g of Enteromorpha with 75mL of water, stir evenly, then transfer to a 150mL polytetrafluoroethylene reactor, heat treatment at 180°C for 24h, and finally filter the obtained solution, wash with water and ethanol, and then in 100°C C under drying for 12h. The obtained sample was designated as EP-1. Through element content analysis, C is 48.60%, H is 4.95%, N is 3.35%, and S is 2.27%. The ash content is 18.7%.

[0025] According to HHV (MJ / Kg)=0.3383*C+1.422*(H-O / 8)=19.54MJ / Kg. Compared with the original 14.1MJ / Kg of Enteromorpha, it has been greatly improved. Therefore, the obtained Hydrochar can be used as a concentrated fuel, and at the same time, because the carbon is fixed, it can be used as a soil fertilizer. SEM image of EP-1 as figure 1 As shown, the surface layer of EP-1 is composed of many nanorod structures.

Embodiment 2

[0027] Mix enteromorpha, citric acid and water in a mass ratio of 5:1.25:75, stir evenly, then transfer to a 150mL polytetrafluoroethylene reactor, conduct hydrothermal treatment at 180°C for 24h, and finally filter the obtained solution , washed with water and ethanol, and then dried at 100° C. for 12 h. The obtained sample was designated as EP-2. Such as figure 2 As shown, the EP-2 sample has a large number of network structures.

Embodiment 3

[0029] Mix the EP-2 sample, KOH, and water at a mass ratio of 1:1:20, stir evenly, and then place it at 60°C for 1.5h. Continue to transfer to an oven to dry the water, and finally place the obtained Hydrochar / KOH composite sample in a tube furnace for carbonization and activation, using a temperature program of 2°C / min, and a fixed temperature at 600°C for 4h. The finally obtained sample was dissolved in 10% HF solution for 4 hours, filtered, washed and dried to obtain EP-3. Through elemental analysis, the C content of the EP-3 sample is 56.35%, the H content is 2.78%, and the N content is 2.58%. The EP-3 sample not only has a microporous structure, a mesoporous structure, but also a macroporous structure, and different pores are connected to each other to form a network structure. Such as image 3 shown. The specific surface area of ​​EP-3 sample is 418m 2 / g,

[0030] Among them, the micropore specific surface area is 358m 2 / g, the total pore volume is 0.37cm 3 / g, th...

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Abstract

For solving the environmental pollution problem of current enteromorpha, the invention discloses a method for preparing enteromorpha-based Hydrochar by taking enteromorpha as a basic raw material. The method comprises the steps of uniformly mixing enteromorpha, citric acid and water in a ratio of 5: (0-1.25):75 so as to form slurry; and then, carrying out hydrothermal carbonization on the slurry for 24 h at temperature of 160-200 DEG C. Compared with an enteromorpha raw material, the enteromorpha-based Hydrochar has a high HHV value, and as a stable fixed carbon source, the Hydrochar can inhibit the emission of CO2 and can be used as a soil fertilizer; and by taking the enteromorpha-based Hydrochar as a precursor, a CO2 carbon-based adsorbent is successfully prepared by using a KOH activation method, and the CO2 carbon-based adsorbent is simple in preparation method and low in cost, and has good regeneration and cycle use performances. Due to the development of the enteromorpha-based Hydrochar and the CO2 carbon-based adsorbent, the environmental pollution problem of enteromorpha is successfully solved, and CO2 in air is reduced.

Description

Field of invention: [0001] The invention relates to a preparation method of a new type of enteromorpha-based carbon material. The method belongs to the field of secondary utilization of waste, and mainly comprises the preparation of enteromorpha-based Hydrochar under mild conditions by using enteromorpha as a basic raw material and secondary chemical activation. CO with graded pore distribution 2 carbon-based adsorbent. technical background: [0002] With the excessive exploitation of fossil energy, the demand for energy is increasing, and the resulting CO 2 The greenhouse effect caused by the gas is becoming more and more serious. CO 2 Excessive emissions have caused a series of problems such as rising global average temperature, melting glaciers, and ocean acidification. According to the IPCC Fourth Assessment report, global CO 2 The average concentration has increased from 280ppmv pre-industrial to 379ppmv in 2005 and 390ppmv currently, while CO 2 Emissions have inc...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C01B31/08B01D53/02
CPCY02P20/151
Inventor 阎子峰张占全邢伟乔柯刘欣梅王有和张志华张忠东高雄厚
Owner PETROCHINA CO LTD
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