Use of a filter element for the adsorption of hydrocarbons

Patent metadata

Field	Value
Publication number	US-9855825-B2
Application number	US-201514715651-A
Country	US
Kind code	B2
Filing date	May 19, 2015
Priority date	May 19, 2014
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

The use of a filter element with a body which has material which is suitable for adsorption of gases and vapors, the body being in the form of a honeycomb body, is, with regard to the object of supplying a substantially closed chamber with filtered inlet air in trouble-free fashion, the inlet air being virtually completely freed from pollutants which are present in the form of aerosols, gases, liquid droplets or solid particles, and a filter element of simple construction being used, wherein the filter element is used for supplying filtered inlet air to an at least partially closed-off chamber, the inlet air being freed from pollutants which are present in the form of aerosols, gases, liquid droplets or solid particles.

First claim

The invention claimed is:

1. A method of supplying filtered inlet air to an at least partially closed-off chamber, the method comprising:
contacting inlet air with a filter element, thereby freeing the inlet air from a pollutant comprising an aerosol, gas, liquid droplet, solid particle, or mixture thereof, to obtain a filtered air;
supplying the filtered air to an at least partially closed-off chamber,
wherein the filter element comprises a honeycomb body, the honeycomb body comprising activated carbon wherein an activated carbon fraction in the honeycomb body amounts to between 50 and 80 wt %, and
wherein a wall thickness of duct walls is in a range of from 285 and 400 μm,
wherein the honeycomb body comprises ducts in a range of from greater than 62 to 100 per square centimeter,
wherein the honeycomb body has a wall thickness of at least 285 μm,
wherein the honeycomb body exhibits adsorption dynamics such that, at an outflow side of the filter element, a test gas concentration of less than 10 μg/g according to a cyclohexane method in accordance with EN 12941, from 1998, is attained in a test duration of 70 minutes measured in accordance with EN 15695-2, from 2009.

2. The method of claim 1 , wherein the honeycomb body comprises a duct formed in the honeycomb body, or
wherein the honeycomb body comprises a fully open duct extending through the honeycomb body, or
both.

3. The method of claim 1 , wherein the honeycomb body comprises 93 ducts per square centimeter,
wherein the honeycomb body has a wall thickness of 285 μm, and
wherein the honeycomb body comprises an activated carbon fraction of 65 wt %.

4. The method of claim 1 , wherein the chamber is implemented in an installation in the chemical industry, oil industry or gas industry.

5. The method of claim 1 , wherein the chamber is in the form of a cabin of a vehicle.

6. The method of claim 5 , wherein the vehicle is an agricultural or forestry vehicle.

7. The method of claim 5 , wherein the vehicle is used in construction.

8. The method of claim 5 , wherein the vehicle is a passenger motor vehicle or utility motor vehicle.

9. The method of claim 1 , wherein the filter element is in the form of a combination filter,
wherein the combination filter comprises a particle-filtering filter stage.

10. The method of claim 1 , wherein the filter element is in the form of a combination filter,
wherein the combination filter comprises a dust-filtering filter stage and an aerosol-filtering filter stage.

11. The method of claim 1 , wherein the honeycomb body comprises 93 to 100 ducts per square centimeter.

12. The method of claim 1 , wherein the honeycomb body has a wall thickness of 285 μm.

13. The method of claim 1 , wherein the honeycomb body comprises an activated carbon fraction of 65 wt %.

14. The method of claim 1 , wherein the filter element exhibits a pressure loss of less than 50 Pascal at an inflow speed of the inlet air of 0.2 m/s.

15. The method of claim 1 , wherein the honeycomb body comprises an activated carbon fraction of at least 65 wt %.

16. The method of claim 1 , wherein the honeycomb body comprises more than 62 up to 100 ducts per square centimeter.

17. The method of claim 1 , wherein the honeycomb body has a wall thickness of at least 285 μm, and
wherein the honeycomb body comprises an activated carbon fraction of at least 65 wt %.

Assignees

• Freudenberg Carl Kg

Inventors

• Felber Uwe
• Stoesser Thomas
• Stahl Ulrich
• Wolff Thomas

Classifications

• B01D2258/06

  Polluted air · CPC title

• B01D2259/4508

  for cleaning air in buildings · CPC title

• B01J20/28045

  Honeycomb or cellular structures; Solid foams or sponges · CPC title

• B01D2253/102

  Carbon · CPC title

• B60H2003/0691

  Adsorption filters, e.g. activated carbon · CPC title