WO2020039125A1 - Processus de sorption basé sur l'interaction de l'eau ayant lieu au niveau d'interfaces solide-liquide de structures cellulosiques hygroscopiques - Google Patents

Processus de sorption basé sur l'interaction de l'eau ayant lieu au niveau d'interfaces solide-liquide de structures cellulosiques hygroscopiques Download PDF

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Publication number
WO2020039125A1
WO2020039125A1 PCT/FI2019/050595 FI2019050595W WO2020039125A1 WO 2020039125 A1 WO2020039125 A1 WO 2020039125A1 FI 2019050595 W FI2019050595 W FI 2019050595W WO 2020039125 A1 WO2020039125 A1 WO 2020039125A1
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WO
WIPO (PCT)
Prior art keywords
water
assembly
biomaterial
hygroscopic
cellulose
Prior art date
Application number
PCT/FI2019/050595
Other languages
English (en)
Inventor
Minna HAKALAHTI
Tekla Tammelin
Ville RISSANEN
Original Assignee
Teknologian Tutkimuskeskus Vtt Oy
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 Teknologian Tutkimuskeskus Vtt Oy filed Critical Teknologian Tutkimuskeskus Vtt Oy
Publication of WO2020039125A1 publication Critical patent/WO2020039125A1/fr

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Classifications

    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/02—Loose filtering material, e.g. loose fibres
    • B01D39/04—Organic material, e.g. cellulose, cotton
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • 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
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/08—Polysaccharides
    • B01D71/10—Cellulose; Modified cellulose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • 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
    • B01D2239/025—Types of fibres, filaments or particles, self-supporting or supported materials comprising nanofibres
    • 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
    • B01D2239/0414—Surface modifiers, e.g. comprising ion exchange groups
    • B01D2239/0428—Rendering the filter material hydrophobic
    • 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
    • B01D2239/1233—Fibre diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/20—Organic adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/80—Water

Definitions

  • the present invention concerns a process for the water-induced sorption of small particulate matter from a process feed consisting of air into a hygroscopic assembly.
  • the hygroscopic assembly is prepared from a cellulosic biomaterial.
  • Forest derived materials are gaining an increasingly important role as functional materials due to their ability to positively address global challenges such as resource sufficiency, climate change and urbanization.
  • These forest derived materials can be utilized, e.g. by exploiting the inherent hydrophilicity and hygroscopicity of wood-derived cellulosic building blocks, which are highly advantageous features supporting the requirements of many such functional materials and applications.
  • Using such forest derived materials as e.g. membranes and filters it is possible to relieve global environmental problems, such as scarcity of clean air and water, as well as agricultural resource sufficiency and urbanization.
  • Pollutants in air and water include many types of small particles, some of which are even inhalable and cause health adversities.
  • Such inhalable particle pollution typically contain particles having diameters of less than lOpm, including among others dust and pollen, as well as fine particles even smaller than 2.5pm, including among others combustion particles, organic compounds and metals.
  • KR101551850B describes the formation of a porous filter structure for dust removal, by performing solvent exchange, on microfibrillated cellulose, from water to non-polar solvent, followed by freeze-drying.
  • US2012039756A1 and WO2015187412A1 describe the use of microfibrillated cellulose in manufacturing filters for use in purifying e.g. air or other gases.
  • the described structures are not suitable for capturing pollutants through water interactions.
  • CN105498550 describes the preparation of a non-woven fabric composite nanofiltration membrane and its application in water treatment.
  • said membrane is used as a typical water filter, instead of using it at a gaseous water-air interface.
  • a process for the water-induced sorption of small particulate matter from a gaseous process feed into a hygroscopic assembly is provided.
  • the small particulate matter includes particles carried by air or water, especially particles incorporated with water in air (i.e. with the moisture in air).
  • the utilized assembly is made of a hygroscopic cellulosic biomaterial. The hygroscopic assembly provides a route to capture particles, which have been incorporated with water in air, through adsorption at solid-gas interface.
  • the concept is based on foams and porous structures that capture moisture and particles, where the capture takes place via a water-induced procedure, i.e. typically by utilizing the hygroscopic properties of the biomaterial.
  • the fibrillar network of the assemblies will provide high surface area, strength, stability and controllable density/porosity balance for optimal capturing capacity and gas/liquid permeability.
  • FIGURE 1 Scanning electron microscopy image of hygroscopic cellulose based structure (a) with particulate matter absorbed into the structure (b) and a schematic illustration of the sorption process (c).
  • nanoscale cellulose is intended to encompass cellulose nanofibers (CNF), microfibrillated cellulose (MFC), nanocrystalline cellulose (NCC) or bacterial nanocellulose.
  • CNF cellulose nanofibers
  • MFC microfibrillated cellulose
  • NCC nanocrystalline cellulose
  • the size of the fibers in these materials is typically 2-500 nm in width, preferably 2-50 nm.
  • small particulate matter in turn, is intended to encompass molecules and other small dust-forming particles, typically having a particle size of ⁇ 10pm, preferably ⁇ 100 nm.
  • RH means the relative humidity, and is surprisingly not an essential feature of the invention.
  • the invention, and causing the induction of the sorption of the particulate matter of the process feed into the assembly of the invention functions at all levels of humidity.
  • the RH level is, however, 50% or more, most suitably at least 75%.
  • the term "porous” is intended to cover all materials having a pore size of 2- lOOOnm, particularly 2-100nm.
  • the present invention relates to a process for water-induced sorption of small particulate matter from a process feed selected from air or water, particularly by providing an assembly prepared from a hygroscopic biomaterial based on nanoscale cellulose, allowing it to absorb vaporous or liquid water to a level of at least 50 %RH, to cause a water-induced structural reconfiguration, and finally placing the assembly in contact with air or water containing particulate matter, while maintaining said %RH level in the structure throughout the contacting.
  • the biomaterial utilized in the invention is typically a cellulosic biomaterial that is capable of forming a 2D or 3D porous network. An example of such a material is cellulose nanofibrils.
  • the biomaterial is obtained from any fibrous plant-based source which can be processed to fibrous structures, preferably from a wood-based source, more preferably from a pulped wood- based source.
  • the assembly prepared from a hygroscopic biomaterial is preferably a porous 2D or 3D assembly.
  • the pore size of such an assembly is typically 2-100nm, while a preferred porosity is >95%, most suitably >99%.
  • Such a porosity allows the controlled passage for assisting gaseous components with sufficient contact points for capturing molecules, or the particulate matter mentioned above.
  • Said high porosity is typically linked with a low density, which for the biomaterial of the present invention preferably is at a level of l-50g/l.
  • the assembly is shaped into one or more layers to form the desired structure for the assembly.
  • hygroscopic materials is cellulose nanofibrils. Upon isolation of these cellulose nanofibrils (CNFs) from their native surroundings, their inherently high hydroxyl group density and the consequential hydrophilic and hygroscopic nature is preserved.
  • CNFs cellulose nanofibrils
  • Water acts as a carrier for the emissions, such as the small particulate matter. Therefore, this procedure relies on both hydrophilicity and hygroscopicity.
  • the capturing typically results in a pressure drop, since the number of particles at the inlet of the assembly is larger than the number of particles at the outlet of the assembly.
  • the pressure drop is, however, preferably at a low level, such as a level of lOOPa or less, more preferably 50Pa or less.
  • the assemblies of the invention can be prepared using any existing technologies for film manufacturing, 3D-printing and foam forming, e.g. 2D structuring via film casting, web forming, or 3D structuring via 3D-printing, foam forming or web forming.
  • the assemblies used in the invention are typically nanoporous structures with high moisture capturing ability.
  • these structures are shaped as macroscaled 3D structures with tunable porosity, prepared by using highly hydrophilic nanocellulosic building.
  • these structures are shaped as films or 2D or 3D macro-scaled structures.
  • the hygroscopicity of the used cellulosic materials coupled with the above- mentioned porosity will provide a high capturing capacity.
  • DF Decontamination factor
  • the present process can be used to prepare filters and other similar 2D and 3D structures that can be used for capturing and optionally valorizing pollutants from air.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

La présente invention concerne un processus de sorption induite par l'eau de petites particules à partir d'une charge de traitement choisie parmi l'air ou l'eau, en particulier en fournissant un ensemble préparé à partir d'un biomatériau hygroscopique à base de cellulose à l'échelle nanométrique, lui permettant d'absorber de l'eau sous forme de vapeur ou de liquide à un niveau d'au moins 50 %RH, pour provoquer une reconfiguration structurale induite par l'eau, et enfin à placer l'ensemble en contact avec de l'air ou de l'eau contenant de la matière particulaire, tout en maintenant ledit niveau %RH dans la structure tout au long de la mise en contact.
PCT/FI2019/050595 2018-08-22 2019-08-22 Processus de sorption basé sur l'interaction de l'eau ayant lieu au niveau d'interfaces solide-liquide de structures cellulosiques hygroscopiques WO2020039125A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20185694 2018-08-22
FI20185694A FI20185694A1 (en) 2018-08-22 2018-08-22 Process for sorption based on water interaction occurring at hygroscopic cellulosic structures between solid and liquid

Publications (1)

Publication Number Publication Date
WO2020039125A1 true WO2020039125A1 (fr) 2020-02-27

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PCT/FI2019/050595 WO2020039125A1 (fr) 2018-08-22 2019-08-22 Processus de sorption basé sur l'interaction de l'eau ayant lieu au niveau d'interfaces solide-liquide de structures cellulosiques hygroscopiques

Country Status (2)

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FI (1) FI20185694A1 (fr)
WO (1) WO2020039125A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120039756A1 (en) 2010-08-12 2012-02-16 Beauharnois Mark Exhaust Gas Treatment Device
KR101551850B1 (ko) 2014-12-18 2015-09-09 한국건설기술연구원 다공성 종이필터의 제조 방법 및 이에 의해 제조된 다공성 종이필터
WO2015187412A1 (fr) 2014-06-04 2015-12-10 The Research Foundation For The State University Of New York Matériaux à réseau fibreux hautement poreux pour filtration de gaz
CN105498550A (zh) 2015-12-10 2016-04-20 华南理工大学 一种无纺布复合纳滤膜及其制备方法与应用
WO2017214419A1 (fr) * 2016-06-09 2017-12-14 Hollingsworth & Vose Company Milieu filtrant comprenant de fines fibres discontinues

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120039756A1 (en) 2010-08-12 2012-02-16 Beauharnois Mark Exhaust Gas Treatment Device
WO2015187412A1 (fr) 2014-06-04 2015-12-10 The Research Foundation For The State University Of New York Matériaux à réseau fibreux hautement poreux pour filtration de gaz
KR101551850B1 (ko) 2014-12-18 2015-09-09 한국건설기술연구원 다공성 종이필터의 제조 방법 및 이에 의해 제조된 다공성 종이필터
CN105498550A (zh) 2015-12-10 2016-04-20 华南理工大学 一种无纺布复合纳滤膜及其制备方法与应用
WO2017214419A1 (fr) * 2016-06-09 2017-12-14 Hollingsworth & Vose Company Milieu filtrant comprenant de fines fibres discontinues

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SU ZHIPING ET AL: "Functionalization of cellulose fiber by in situ growth of zeolitic imidazolate framework-8 (ZIF-8) nanocrystals for preparing a cellulose-based air filter with gas adsorption ability", CELLULOSE, SPRINGER NETHERLANDS, NETHERLANDS, vol. 25, no. 3, 5 February 2018 (2018-02-05), pages 1997 - 2008, XP036454893, ISSN: 0969-0239, [retrieved on 20180205], DOI: 10.1007/S10570-018-1696-4 *

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