WO2022182308A1 - Antimicrobial air filtration device - Google Patents

Antimicrobial air filtration device Download PDF

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Publication number
WO2022182308A1
WO2022182308A1 PCT/TR2021/051469 TR2021051469W WO2022182308A1 WO 2022182308 A1 WO2022182308 A1 WO 2022182308A1 TR 2021051469 W TR2021051469 W TR 2021051469W WO 2022182308 A1 WO2022182308 A1 WO 2022182308A1
Authority
WO
WIPO (PCT)
Prior art keywords
filtration device
filter
nanoparticles
air
housing
Prior art date
Application number
PCT/TR2021/051469
Other languages
French (fr)
Inventor
Ali Kemal OKYAY
Original Assignee
Okyay Ali Kemal
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Okyay Ali Kemal filed Critical Okyay Ali Kemal
Publication of WO2022182308A1 publication Critical patent/WO2022182308A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultra-violet radiation
    • A61L9/205—Ultra-violet radiation using a photocatalyst or photosensitiser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B01D39/083—Filter cloth, i.e. woven, knitted or interlaced material of organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B01D53/885—Devices in general for catalytic purification of waste gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/14—Filtering means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/02—Types of fibres, filaments or particles, self-supporting or supported materials
    • B01D2239/0258—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanoparticles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0442—Antimicrobial, antibacterial, antifungal additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B01D2239/0492—Surface coating material on fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0609—Knitted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
    • B01D2239/0604—Arrangement of the fibres in the filtering material
    • B01D2239/0613—Woven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1216—Pore size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20792—Zinc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/92—Dimensions
    • B01D2255/9202—Linear dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light

Abstract

The present invention relates to an air filtration device having antimicrobial efficiency. Accordingly, a filtration device has been developed that includes a photocatalytic filter having photocatalytic effect and a suitable radiation source. Operation of this filtration device in such a way as to prevent the release of harmful substances into the environment is also described.

Description

ANTIMICROBIAL AIR FILTRATION DEVICE
Technical Field
The present invention relates to an air filtration device having antimicrobial activity and a method to operate this device.
Background of the Invention
The usage of ultraviolet radiation for the cleaning of environments with microbial contamination, including bacterial and fungal microorganisms, is extensively known. However, it is necessary to operate for long periods or with very high intensity radiation to obtain reliable results.
In the case of exposing the photocatalytic materials to radiation, the cleaning process can be performed more quickly and reliably.
Various photocatalytic antimicrobial coatings have been disclosed in "Photocatalytic antimicrobial coatings" (Ramsden, Jeremy. (2015). Photocatalytic antimicrobial coatings. Nanotechnology Perceptions. 11. 146-168. 10.4024/N12RA15A.ntp.011.03.).
Bacteria cleaning of the gaseous medium, which is passed through a tube with an inner surface coated by titanium dioxide under ultraviolet radiation has been disclosed in "Biological Agent Inactivation in a Flowing Air Stream by Photocatalysis" (Keller, Valerie & Keller, Nicolas & Ledoux, Marc & Lett, Marie-Claire. (2005). Biological Agent Inactivation in a Flowing Air Stream by Photocatalysis. Chemical communications (Cambridge, England). 23. 2918-20. 10.1039/b503638k.).
Formation of zinc oxide and titanium dioxide nanoparticles on a porous polyvinylidene difluoride membrane by chemical vapor deposition method to take advantage of their photocatalytic effects has been disclosed in "Chemical Vapor Deposition of Photocatalyst Nanoparticles on PVDF Membranes for Advanced Oxidation Processes" (Filpo, Giovanni & Pantuso, Elvira & Armentano, Katia & Formoso, Patrizia & Di Profio, Gianluca & Poerio, Teresa & Fontananova, Enrica & Meringolo, Carmen & Mashin, Aleksandr & Nicoletta, Fiore. (2018). Chemical Vapor Deposition of Photocatalyst Nanoparticles on PVDF Membranes for Advanced Oxidation Processes. Membranes. 8. 35. 10.3390/membranes8030035.).
Brief Description of the Invention
The object of the present invention is to develop an air filtration device having antimicrobial activity. Accordingly, a filtration device has been developed that includes a suitable radiation source with a filter capable to photocatalytic effect. Operation of this filtering device in such a way as to prevent the release of harmful substances into the environment is also described.
Description of Drawings
The drawings and related explanations used to better demonstrate the filtration device developed with the invention are given below.
Figure-1 is the perspective view of a filtration device according to invention.
Figure-2 is the perspective view of a filtration device according to invention.
Figure-3 is the schematic cross-sectional view of the filtration device in Figure-2.
Figure-4 is the schematic view of a filter which can be used in the filtration device according to the present invention.
Figure-5 is the schematic view of a monatomic molecules coated filter which can be used in the filtration device according to the present invention.
Figure-6 is the schematic view of the molecular structure included in a filter which can be used in the filtration device according to the present invention. Figure-7 the schematic view of a T1O2 molecules coated filter which can be used in the filtration device according to the present invention.
Figure-8 the schematic view a ZnO molecules coated filter which can be used in the filtration device according to the present invention.
Figure-9 the schematic view a SnO molecules coated filter which can be used in the filtration device according to the present invention. Figure-10 the schematic view of a Ag02 molecules coated filter which can be used in the filtration device according to the present invention.
Figure-11 the schematic view of a Cu02 molecules coated filter which can be used in the filtration device according to the present invention. Figure-12 the schematic view of a Cu03 molecules coated filter which can be used in the filtration device according to the present invention.
Figure-13 the schematic view of a CuC>4 molecules coated filter which can be used in the filtration device according to the present invention.
Figure-14 is A-A cross-sectional view of the rope composing the web of a filter which can be used in the filtration device according to the present invention.
Figure-15 is the schematic view of chaotic web structure of a filter which can be used in the filtration device according to the present invention.
The parts in the drawings are numbered and the corresponding numbers are given below.
1. Filtration device
2. Housing
3. Radiation source
4. Fan
5. Auxiliary filter
6. Inlet
7. Outlet
8. Filter
9. Web
10. Nanoparticle
11. Ti0 12. ZnO
IB. SnO
14. Ag02
15. Cu02
16. Cu03
17. Cu04
Detailed Description of the Invention
According to the invention, the filtration device (1), basically includes at least one inlet (6) and outlet (7) providing the air exchange between outside and inside, a housing (2) composed of a closed chamber, at least one fan (4) placed in housing (2) and drawing back the filtered air by outlet (7) while drawing air from outside by inlet (6), at least one radiation source (3) placed in housing (2) and positioned to radiate through at least filter (8) inside the housing (2) with at least one filter (8) including nanoparticles (10) having photocatalytic effects on its surface.
The filter (8) consists of a permeable structure and nanoparticles (10) on this permeable structure. The nanoparticles (10) are preferably composed of titanium dioxide (Ti02) or zinc oxide (ZnO).
Ti02 or ZnO nanoparticles (10) form electron-hole pairs under ultraviolet radiation. Because of the nanoparticles (10) size in the order of nanometers, these electron-hole pairs can also interact with the environment surrounding the nanoparticle (10) before they coalesce. During this interaction, radicals are released that cause the degradation of organic molecules. Thus, nanoparticles (10) under ultraviolet radiation can be used against microbes such as bacteria, fungi and mold in the air.
In order to show high efficiency for Ti02 or ZnO nanoparticles (10), a radiation source (3) that produces ultraviolet radiation, preferably a radiation source (3) that produces radiation in the wavelength range of 100 to 280 nm, referred to as UV-C, is facilitated. The filter (8) may also contain compounded (doped) Ti02 or ZnO nanoparticles (10). It is also possible that the doped nanoparticles (10) may show activity in a wider range compare to UV-C band or outside the UV-C band. On the other hand, a radiation source (3) that produces radiation in the UV-C band is preferred in order that the radiation source (3) is to have an antimicrobial effect directly, not together with the filter (8).
The permeable structure can be a web (9) (mesh) or an open-cell sponge. To allow the full utilization of the nanoparticles (10) by adequately penetrating the radiation into the filter (8), the permeable structure is preferably in a form with a small thickness relative to the surface area, for example in a planar form or in the form of the surface of a three-dimensional structure.
The web (9) may be selected from any of the nonwoven or woven fabric manufacturing techniques known in the art. The web (9) may be in the form of woven, knitted or three- dimensionally woven derived from fibers, fibers, or wires with a diameter of 50 to 1500 pm. These fibers, fibers or strands can have a frequency of 100 to 10,000 units per square millimeter.
Web (9) preferably has a mesh size of 20 to 200 pm. Thus, the web (9) can be effective against a wide variety of microorganisms. Nevertheless, web (9) may also have a larger mesh to act selectively against certain microorganisms. For example, for use against microorganisms over a certain size, mesh sizes which are large enough to be less likely to interact with smaller microorganisms, may be selected.
The sponge preferably has an average cell diameter of 50 to 1500 pm. Thus, the sponge can be effective against a wide variety of microorganisms. However, the sponge may also have a larger cell diameter to act selectively against certain microorganisms. For example, for use against microorganisms over a certain size, mesh sizes which are large enough to be less likely to interact with smaller microorganisms, may be selected.
The diameters of the nanoparticles (10) are preferably range between 10 and 100 nm.
The web (9) forming the filters (8) can be coated with molecules having different compounds due to its structure. Ti0 (11), ZnO (12), SnO (13), Ag02 (14), Cu02 (15), Cu03 (16), Cu04 (17) and any and/or more than one mixture of metal oxide components can be applied onto web (9) according to the region to be applied and the activity status. The web (9) can have a square structure in certain dimensions, but it can also have a structure consisting of chaotic layers such as a fiber web. Different methods such as electro spraying or nanoweb can be used to create this structure. The efficiency of filters (8) can be rearranged by creating webs (9) having different dispersed structures according to the method used.
The filtration device (1) according to the present invention may also include auxiliary filters (5) together with the filter (8). Auxiliary filters (5) can be structures that provide mechanical filtering of large particles in the air or structures loaded with silver ions and/or activated carbon.
The filtration device (1) can be of different sizes according to the amount of air that is desired to be filtered in a certain period. The hosing (2) can be in the form of an elongated structure according to its cross-sectional area to accommodate more than one filter (8), auxiliary filter (5), fan (4) and/or radiation source (3). The housing (2) may also be in a form with a large opening facing the radiation source (3) to ensure that the air is exposed to radiation for a long time as long as possible.
The free radicals, which are released by the exposure of the photocata lytic nanoparticles (10) to the radiation emitted by the radiation source (3), should not accumulate at levels to be released into the external environment. Therefore, in a preferred embodiment of the invention, the radiation source (3) is operated intermittently. The time that the radiation source (3) is operated and not operated can be determined depending on variables such as the surface area of the filter (8), the amount of nanoparticles (10) on the filter (8) and the air flow over the filter (8).
The antimicrobial air filtration device (1) according to the present invention, can also be used for cleaning the gases containing organic matter in general, apart from the air having bacterial and fungal contamination effect.
During the industrial application of the invention, there are filter (8) frame slots on the housing (2), which allow the carrier frames carrying the filters (8) on them to be reversed frequently.

Claims

1. A filtration device (1) for filtering air with antimicrobial efficiency, which includes, a housing (2) that forms a closed chamber as well as at least an inlet (6) and an outlet (7) that provides air exchange with the outside environment, at least one fan (4) placed in housing (2) and drawing back the filtered air by outlet (7) while drawing air from outside by inlet (6), at least one radiation source (3) placed in housing (2) and positioned to radiate through at least filter (8); characterized in that at least one filter (8) includes nanoparticles (10) having photocata lytic effect on its surface.
2. A filtration device (1) according to Claim 1, characterized in that a filter (8) includes nanoparticles (10) composed of this permeable structure and titanium dioxide (T1O2) or zinc oxide (ZnO) on this permeable structure.
3. A filtration device (1) according to Claim 2, characterized in that a filter (8) includes T1O2 or ZnO nanoparticles (10) which releases radicals causing degradation of organic molecules by forming electron-hole pairs under ultraviolet radiation.
4. A filtration device (1) according to Claims 1-3, characterized in that a radiation source (3) produces radiation in the wavelength range of 100 to 280 nm, referred to as UV-C to allow T1O2 or ZnO nanoparticles (10) to show high efficiency.
5. A filtration device (1) according to Claims 1-4, characterized in that the filter (8) contain compounded (doped) T1O2 or ZnO nanoparticles (10).
6. A filtration device (1) according to Claims 1-5, characterized in that the filter (8) includes a web (9) in the form of woven, knitted orthree-dimensionally woven derived from fibers, fibers, or wires with a diameter of 50 to 1500 pm.
7. A filtration device (1) according to Claims 1-6, characterized in that the filter (8) includes a web (9) having 20 to 200 pm mesh size to be effective against wide variety of microorganisms.
8. A filtration device (1) according to Claims 1-7, characterized in that the filter (8) includes a sponge having 50 to 1500 pm mesh size to be effective against wide variety of microorganisms.
PCT/TR2021/051469 2021-02-25 2021-12-23 Antimicrobial air filtration device WO2022182308A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR2021/003211A TR202103211A2 (en) 2021-02-25 2021-02-25 ANTIMICROBIAL AIR FILTERING DEVICE
TR2021/003211 2021-02-25

Publications (1)

Publication Number Publication Date
WO2022182308A1 true WO2022182308A1 (en) 2022-09-01

Family

ID=76373608

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2021/051469 WO2022182308A1 (en) 2021-02-25 2021-12-23 Antimicrobial air filtration device

Country Status (2)

Country Link
TR (1) TR202103211A2 (en)
WO (1) WO2022182308A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011049140A1 (en) * 2009-10-20 2011-04-28 株式会社フジコー Fibrous filter and air purification device
US20130034470A1 (en) * 2011-08-03 2013-02-07 Honeywell International Inc. Led activated photocatalyst air filter
US20190113246A1 (en) * 2017-10-17 2019-04-18 Molekule Inc. System and method for photoelectrochemical air purification
US20200030731A1 (en) * 2018-07-26 2020-01-30 Molekule Inc. Fluid filtration system and method of use

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011049140A1 (en) * 2009-10-20 2011-04-28 株式会社フジコー Fibrous filter and air purification device
US20130034470A1 (en) * 2011-08-03 2013-02-07 Honeywell International Inc. Led activated photocatalyst air filter
US20190113246A1 (en) * 2017-10-17 2019-04-18 Molekule Inc. System and method for photoelectrochemical air purification
US20200030731A1 (en) * 2018-07-26 2020-01-30 Molekule Inc. Fluid filtration system and method of use

Also Published As

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