Noninflammable active carbon composite material as well as preparation method and purpose thereof

A composite material and activated carbon technology, which is applied in chemical instruments and methods, other chemical processes, gas treatment, etc., can solve the problem of loss of activated carbon adsorption performance, achieve uniform temperature of the bulk phase, improve stability, and be easy to extrude. Effect

Inactive Publication Date: 2018-06-08
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the stability of the activated carbon bed and reduce the possibility of fire, CN104743555A discloses a technical scheme for increasing the ignition point of granular activated carbon by adding inorganic binders such as phosphate, silicate, borate, sulfate, Due to the addition of these flame-retardant and flame-inhibiting components, the ignition point of activated carbon particles is improved, which is conducive to reducing the probability of fire occurrence during high-temperature regeneration. CN106744948A discloses mixing clean wood chips with activators and high ignition point modifiers, Impregnation, then accelerated forming on rolls, and drying and hardening, wherein the active agent is phosphoric acid or zinc chloride, and the high ignition point modifier includes one or any mixture of calcium, magnesium, silicon oxide or sodium silicate. However, due to solubility The addition of salts, such as sodium silicate, will block some of the pores of activated carbon, resulting in the loss of activated carbon adsorption performance. In addition, when the heat in the bed accumulates a lot and reaches the ignition point of the new activated carbon material, fire accidents will also occur

Method used

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  • Noninflammable active carbon composite material as well as preparation method and purpose thereof
  • Noninflammable active carbon composite material as well as preparation method and purpose thereof
  • Noninflammable active carbon composite material as well as preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] An activated carbon honeycomb that is not easy to catch fire, including integrated activated carbon and 1000 mesh SiC particles.

[0041] It is prepared by the following method:

[0042] Weigh the specific surface 800m 2 100g (particle size: 200 mesh) of woody activated carbon per gram, add carboxymethylcellulose (CMC) 5g, water 50g, emulsified phenolic resin 5g, 1000 mesh SiC powder 18.5g, mix and extrude under 20MPa pressure to become activated carbon honeycomb, Dry at 60°C for 48h, then in N 2 The heating rate is raised to 400°C at a temperature of 3°C / min for carbonization forming, and an activated carbon honeycomb with good flame resistance is obtained, in which the SiC content is about 15%.

[0043] This non-flammable activated carbon honeycomb does not ignite continuously under 200°C air for 24 hours, and does not ignite under 200°C steam for 48 hours.

Embodiment 2

[0045] A rod-shaped activated carbon particle that is not easy to catch fire, including integrated activated carbon and 1000-mesh BN particles.

[0046] It is prepared by the following method:

[0047] Weigh 1000g of long-flame coal powder (particle size 200 mesh), add CMC 50g, water 520g, emulsified phenolic resin 20g, activated clay 10g, 1000 mesh BN powder 89.5g, after mixing evenly, extrude under 15MPa pressure to form a diameter of 2mm and a length of 8mm. ~10mm rod shape, dried at 60℃ for 48h, and then in N 2 Under 3°C / min, the heating rate rises to 550°C for carbonization, and then switches to CO 2 Continue to heat up to 880°C for activation for 2 hours in the atmosphere to obtain rod-shaped activated carbon particles with good flame resistance, with a specific surface area of ​​550m 2 / g, the BN content is around 8%.

[0048] The rod-shaped activated carbon particles do not ignite continuously for 24 hours under 200°C air, and do not ignite under 200°C steam for 48 ...

Embodiment 3

[0050] A rod-shaped activated carbon particle that is not easy to catch fire, including integrated activated carbon, 400-mesh BN particles and 100-mesh SiC particles.

[0051] It is prepared by the following method:

[0052] Weigh 2000g of coal-based activated carbon (particle size 100 mesh, specific surface 700m 2 / g), add 100g of emulsified coal tar, 450g of water, 20g of activated clay, 32g of 100-mesh SiC powder, 8g of 400-mesh BN powder, mix well and extrude under 17MPa pressure to form a rod with a diameter of 2mm and a length of 8-10mm, at 60°C Dry for 48 hours under N 2 The heating rate is increased to 500°C at a temperature of 3°C / min for carbonization, and rod-shaped activated carbon particles with good flame resistance are obtained, with a specific surface area of ​​610m 2 / g, the total content of SiC and BN is about 2%.

[0053] The rod-shaped activated carbon particles do not ignite continuously for 24 hours under 200°C air, and do not ignite under 200°C steam ...

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Abstract

The invention relates to a noninflammable active carbon composite material as well as a preparation method and a purpose thereof. The active carbon composite material is prepared from active carbon and inorganic heat conducting particles, wherein the inorganic heat conducting particles comprise SiC particles and/or BN particles. The SiC particles and/or BN particles are added into the active carbon, so that the bulk phase temperature of the whole material is obviously homogenized; the inside heat conduction and diffusion efficiency of the material is improved, so that the flame-retardant stability of the active carbon composite material is greatly improved. Compared with the prior art, the active carbon composite material has the advantages that the pore passage blockage of active carbon cannot be caused; the active carbon adsorption performance stability is greatly improved.

Description

technical field [0001] The invention relates to the technical field of preparation of environmentally friendly materials, in particular to an activated carbon composite material that is not easy to catch fire, its preparation method and application. Background technique [0002] With the rapid development of my country's economy, the problem of industrial exhaust VOCs emissions has become increasingly prominent. With the deepening of current research on atmospheric environmental protection, industrial VOCs treatment has shown a strong market demand. Activated carbon materials are widely used in industrial VOCs treatment. Its huge specific surface area and rich pores are often used to adsorb VOCs in industrial tail gas. At the same time, activated carbon materials are often used to complete the adsorption-increasing Concentrated so that the post-system can use the regenerative combustion / regenerative catalytic combustion (RTO / RCO) method for VOCs digestion. [0003] In all t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2257/302B01D2257/708B01J20/20
Inventor 陈运法刘海弟岳仁亮
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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