Activated carbon fiber sheet for automobile adsorption tank

A technology of activated carbon fiber and adsorption tank, which is applied in the field of activated carbon fiber sheet and its manufacturing, can solve the problem of difficult desorption of gasoline, and achieve the effects of high adsorption and desorption performance, excellent adsorption and desorption performance, and easy disposal.

Pending Publication Date: 2022-04-01
NIPPON PAPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the popularization of idling stop and the like, the air intake capacity of automobiles tends to be suppressed, so it tends to be difficult to desorb gasoline adsorbed on the adsorbent in the canister.

Method used

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  • Activated carbon fiber sheet for automobile adsorption tank
  • Activated carbon fiber sheet for automobile adsorption tank
  • Activated carbon fiber sheet for automobile adsorption tank

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0261] The weight per square meter formed by rayon fibers (17.0dtex, fiber length 76mm) is 300g / m 2 The needle-punched nonwoven fabric is impregnated with 6-10% diammonium hydrogen phosphate aqueous solution, wrung out the liquid, and then dried to allow 8-10% by weight to adhere. The obtained pretreated nonwoven fabric was heated up to 900° C. in a nitrogen atmosphere over 50 minutes, and kept at this temperature for 4 minutes. Next, at this temperature, activation treatment was performed for 18 minutes in a nitrogen stream containing water vapor having a dew point of 71°C.

Embodiment 2

[0263] Use rayon fibers (7.8dtex, fiber length 51mm) with a weight per square meter of 300g / m 2 The activated carbon fiber sheet of Example 2 was produced by the same method as in Example 1 except that.

Embodiment 3

[0265] The weight per square meter formed by rayon fibers (17.0dtex, fiber length 76mm) is 300g / m 2 The needle-punched nonwoven fabric is impregnated with 4 to 8% methanesulfonic acid aqueous solution, wrung out the liquid, and then dried so that 6 to 8% by weight is attached. The obtained pretreated nonwoven fabric was heated up to 900° C. in a nitrogen atmosphere over 40 minutes, and kept at this temperature for 3 minutes. Next, at this temperature, an activation treatment was performed for 16 minutes in a nitrogen stream containing water vapor having a dew point of 71°C.

[0266]

[0267] The weight per square meter formed by rayon fibers (3.3dtex, fiber length 76mm) is 300g / m 2 The needle-punched nonwoven fabric is impregnated with 6-10% diammonium hydrogen phosphate aqueous solution, wrung out the liquid, and then dried so that 8-10% by weight is attached. The obtained pretreated nonwoven fabric was heated up to 900° C. over 50 minutes in a nitrogen atmosphere. Next,...

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Abstract

The present invention addresses the problem of providing an adsorbent using activated carbon fibers, which is suitable for use in an automotive canister and is capable of suppressing pressure loss. Provided is an activated carbon fiber sheet for an automobile canister, which satisfies the following requirements (1)-(4). (1) The specific surface area of the sheet is 1100-2300 m < 2 > / g. (2) the density of the sheet material is 0.010 to 0.200 g / cm < 3 > or less; and (3) the thickness of the sheet material is 0.10 to 100.00 mm. And (4) the fiber diameter of the sheet is 13.0 [mu] m or more.

Description

technical field [0001] The present invention relates to an activated carbon fiber sheet. Specifically, it relates to an activated carbon fiber sheet suitable for a canister of an automobile, a method for producing the same, and the like. Background technique [0002] In gasoline vehicles, the pressure inside the fuel tank fluctuates along with changes in the outside air temperature, and the evaporative fuel gas filled in the fuel tank is released from the fuel tank. The released evaporative fuel gas is one of the causes of PM2.5 and photochemical smog, and in order to prevent it from being released into the atmosphere, an adsorption tank equipped with adsorbent materials such as activated carbon is installed. (Hereinafter, in this specification, a canister mounted on an automobile may be simply referred to as an "automotive canister" or just a "canister".) [0003] In recent years, with the increasing awareness of environmental protection, gas emission restrictions tend to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/08
CPCB01J20/20D01F9/16D06C7/04F02M25/08B01J20/28073B01J20/28071B01J20/28066F02M25/0854B01J20/28076B01J20/28011B01J20/28035B01D53/02B01D2253/102B01D2253/306B01D2257/702B01D2257/7022B01D2259/4516B01D2259/4566B01J20/28033B01D53/04C01B32/312B01J20/3078C01B32/30B01D53/0415B01D2253/25B01D2253/304B01D2253/308B01D2253/311B01J2220/42B01J2220/66D10B2401/10D10B2505/12F02M2200/9046
Inventor 今井大介渡边佳英高田由生小泽骏介芳田千惠
Owner NIPPON PAPER IND CO LTD
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