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Low-impedance activated carbon for automobile carbon tank as well as preparation method and application thereof

A technology of activated carbon and low impedance, applied in the field of activated carbon, can solve the problems of poor adsorption performance and low ventilation impedance

Pending Publication Date: 2021-03-30
FUJIAN XINSEN CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the special-shaped activated carbon prepared by the existing technology cannot solve the problems of high adsorption and low impedance at the same time. Activated carbon with high adsorption performance generally has a high ventilation impedance. For example, when the adsorption performance of butane working capacity (BWC) is >40g / L, its Ventilation impedance at 70L / min flow rate is usually >1.8.0mbar; or activated carbon with low ventilation impedance has poor adsorption performance, for example: activated carbon with ventilation impedance <1.8mbar at 70L / min flow rate usually has BWC adsorption performance <30g / L

Method used

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  • Low-impedance activated carbon for automobile carbon tank as well as preparation method and application thereof
  • Low-impedance activated carbon for automobile carbon tank as well as preparation method and application thereof
  • Low-impedance activated carbon for automobile carbon tank as well as preparation method and application thereof

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preparation example Construction

[0034] The present invention also provides a method for preparing activated carbon for low-impedance automobile canisters described in the above technical solution, comprising the following steps:

[0035] Kneading activated carbon for wooden vehicles, forming agent, dispersant, forming aid and water to obtain slurry;

[0036] placing the slurry in a mold and extruding to obtain a green body;

[0037] The green body is sintered to obtain activated carbon for low-resistance automobile canisters;

[0038] The activated carbon for the low-resistance automobile canister is a cylinder with through holes.

[0039] In the invention, activated carbon for wooden vehicles, forming agent, dispersant, forming auxiliary agent and water are kneaded to obtain slurry. In the present invention, the kneading is preferably carried out in a mud mixer, the kneading temperature is preferably 20-40°C, and the kneading time is preferably 30°C. The invention fully mixes the activated carbon for woo...

Embodiment 1

[0047] Put 1000g activated carbon for wooden vehicles (particle size is 75 μm), 300g forming agent attapulgite, 20g dispersing agent polyvinyl alcohol, 50g forming auxiliary carboxymethyl cellulose and 1500g water in the mud mixer, at 30 ℃ Carry out kneading 2h under, obtain slurry;

[0048] The slurry is placed in a porous stainless steel mold, and extruded in a high-pressure vacuum screw extruder at an extrusion speed of 30 cm / min to obtain a green body;

[0049] The green body is pre-dried in a tunnel hot air furnace, then cut into activated carbon of required size, and sintered at 700°C for 2 hours to obtain the following: figure 1 Activated carbon for low impedance automotive canisters with through holes shown;

[0050] The activated carbon used for the low-impedance automobile carbon canister is a cylinder, with a diameter of 35mm and a height of 50mm; the cross-section of the through hole is circular, and the diameter of the through hole is 1mm; the number of channels ...

Embodiment 2

[0053] Put 1000g activated carbon for wooden vehicles (particle size is 75 μm), 250g forming agent attapulgite, 10g dispersing agent polyvinyl alcohol, 50g forming auxiliary carboxymethyl cellulose and 1500g water in the mud refining machine, under the condition of 30 ℃ Carry out kneading under 2 hours, obtain slurry;

[0054] The slurry is placed in a porous stainless steel mold, and extruded in a high-pressure vacuum screw extruder at an extrusion speed of 30 cm / min to obtain a green body;

[0055] The green body is pre-dried under the condition of a tunnel hot air furnace, then cut into activated carbon of required size, and sintered for 2 hours under a nitrogen protective atmosphere at 700°C to obtain a low-impedance activated carbon for automobile canisters with through holes;

[0056] The activated carbon for the low-impedance automobile carbon canister is a cylinder, with a diameter of 35mm and a height of 100mm; the cross-section of the through hole is circular, and th...

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Abstract

The invention relates to the technical field of activated carbon, in particular to activated carbon for a low-impedance automobile carbon tank as well as a preparation method and application thereof.The low-impedance activated carbon for the automobile carbon tank, provided by the invention, comprises the following preparation raw materials in parts by weight: 1000 parts of activated carbon for awooden automobile; 250 to 350 parts of a forming agent; 10 to 30 parts of a dispersant; 30 to 100 parts of a forming auxiliary agent; and 1200 to 2200 parts of water; wherein the activated carbon forthe low-impedance automobile carbon tank is a cylinder with a through hole. Based on the cooperation of the preparation raw materials, the adsorption performance of the activated carbon can be improved; meanwhile, the activated carbon provided by the invention is a cylinder with through holes, so that the ventilation resistance can be reduced, and the technical effect of low impedance is achieved. Results of the embodiment show that the butane working capacity (BWC) of the low-impedance activated carbon for the automobile carbon tank provided by the invention is greater than 40 g / L, and the ventilation impedance at the flow rate of 70L / min is less than 1.8 mbar.

Description

technical field [0001] The invention relates to the technical field of activated carbon, in particular to an activated carbon for a low-impedance automobile canister, a preparation method and application thereof. Background technique [0002] With the increasingly stringent requirements of China's automobile emission regulations, in order to meet the emission requirements, the fuel evaporative emission control device, that is, the carbon canister for vehicles, has higher adsorption performance, which leads to the larger and larger volume of the canister, such as the national five canister The volume of the carbon tank is usually 600-800mL, while the volume of the National VI carbon tank is 2000-3000mL; the increase in the volume of the carbon tank will lead to an increase in the ventilation resistance of the carbon tank, which will eventually affect the refueling performance of the vehicle, and the excessive ventilation resistance will lead to Occurrence of refueling jump gu...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01J20/20B01D53/02B01D2253/102
Inventor 林鹏林锴刘飞峰陈家棋官忠明
Owner FUJIAN XINSEN CARBON
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