Textile waste for chemical and textile industries feedstock (presentation of EU project)

Transcription

1 IOP Conference Series: Materials Science Engineering PAPER OPEN ACCESS Textile waste for chemical textile industries feedstock (presentation EU project) To cite this article: B Voncina et al 2018 IOP Conf. Ser.: Mater. Sci. Eng View the article online for updates enhancements. This content was downloaded from IP address on 14/12/2018 at 12:12

2 Aegean International Textile Advanced Engineering Conference (AITAE 2018) IOP Conf. Series: Materials Science Engineering 459 (2019) doi: / x/459/1/ Textile waste for chemical textile industries feedstock (presentation EU project) B Voncina 1, J Valh Volmajer 1, S Vajnhl 1, A Majcen Le Marechal 1, A P Aneja 1 A Lobnik 1,2 1 University Maribor, Institute Engineering Materials Design, Laboratory for Chemistry Environmental Protection, 2 Institute for Environmental Protection Sensors, Maribor, Slovenia bojana.voncina@um.si Abstract The RESYNTEX project aims at designing, developing demonstrating a new industrial symbiosis between textile waste the chemical industry. The new original symbiosis is based on the chemical/enzymatic transformation textile waste in a form that facilitates the easy take up as feedstock by the chemical industry in order to produce high added value chemicals. The parallel production various high added value ensures competitive production costs for the chemical market. As a result, economic advantages can be provided besides prevention industrial environmental problems. The project will consider demonstrate the whole value chain starting from the citizen behaviour change the textile collection unwearable textiles, improving automatizing the industrial sorting, demonstrating the production the transformed textile components the symbiosis with the obtained chemical finally analysing the best economic models policy actions for a successful introduction in EU markets. Keywords: textile waste,, chemical depolymerisation, enzymatic transformation, circular economy. 1. Introduction According to the statistic [1] we can estimate that textile waste annual volumes will reach 17 Mt in Targeting a significant increase in collection rate (50 % in 2020) considering that 23 % textile waste is constituted re-wearable clothes remaining waste could be recycled at a rate 95 %, we can estimate a potential 6.2 Mt fibers per year that could be converted into new feedstock. In the long term (post 2020), reaching 100 % collection would give access to more than 12.4 Mt fibers. As a consequence, there is a strong need to develop a new industrial symbiosis based on this textile waste stream associated with adapted processes in order to achieve an efficient especially for non-wearable textile waste move away from lfilling energy. The textile process could therefore be considered as one the effective methods in reducing the production virgin materials minimising the environmental impact, i.e. use water, energy chemicals in the textile production chain, as well as in reducing the amount textile waste. In general, the post-consumer textile waste can be recycled by 4 main methods: - Defibrilation/shredding/pulling/carding into fibres - Energetic - Thermo-mechanical - Chemical Content from this work may be used under the terms the Creative Commons Attribution 3.0 licence. Any further distribution this work must maintain attribution to the author(s) the title the work, journal citation DOI. Published under licence by Ltd 1

3 Aegean International Textile Advanced Engineering Conference (AITAE 2018) IOP Conf. Series: Materials Science Engineering 459 (2019) doi: / x/459/1/ Experiments The main objective WP4, wheree Univ versity Maribor is currently mostl ly invo olved, is optimisation a physicochemical /transformation processs via depolymerisation textile waste e. Scope goal: Total chemical depo olymerisationn PET or PA mater rial after sequentiall protein cellulose removal. This eco- -friendly process comprisess : - poly yamide with the prod duction PAss oligomers - poly yester the production PET mon nomers Defibrillation/carding is carried out by breakdown fabric to fiber through cutting, shredding,, carding, other mechanical processes. The fibe r is then re-engineered into value-added. These value-added include stuffing,, automotive com mponents, carpet underlays, building materials such as insulation roing felt, low-end blankets. The majority thiss category consists unusable garments - garmg ments that are stained, torn n, or otherwise unusable. Several methodss are availablee for energyy from was ste such as gasification, pyrolysis, carbonisation etc. [3]. Thermo-mechanical is re-melting the sorted waste thermoplastic. This method is mainly used for bottle to fiber technologies, where sorted cleaned PET bottles are re-extruded the t more value from plastic wastess than ncineration. By more restrictively definition, the chemc mical may be defined as into for non-food application, to textile fibers. Chemical (also called feedstock or tertiary ) allows 'the production chemical value from waste polymeric mat terials by economically feasible processes'. This definition, which requires the value, excl ludes from chemical both biodegradation combustion, limits chemical too those processes that are also economically feasible [4]. The chemical are easily reintroduced into the prod ductionn cycle,, without any problems market saturation; anoth her benefitt is thatt thee crude resulting from chemical breakdown can be used with hout furtherr purification RESYNTEX Consortium RESYNTEX has 20 project partners from across 10 diffe erent EU member states (Figure 1). Partners inclu ude industrial associations, businesses, SMEs research institutes. Worki ing together, thee group creates an effective model for the whole value chain. Figure 1. RESYNTEX Consortium 2

4 Aegean International Textile Advanced Engineering Conference (AITAE 2018) IOP Conf. Series: Materials Science Engineering 459 (2019) doi: / x/459/1/ Figure 2. Laboratory scale high pres ssure, high h temperature reac ctor. Relevant issues: - influ uence impurities on PAs PET depolymerisation, yield, effice ciency purity; impact other orga anic inorganic waste on chemical transformation. - opti imization production adde ed value feedstock for chemical industry in a pilot plant. - Figure 3. Pilot high pressuree highh temperature plan nt. 3. Resultss discussion 3.1 Polyamide with the production f PAs oligomers Chemical depolymerisation PA6 was performed prom mising resultss were obtained (liquid fractions which precipitate after few hours were obtained) by highh temperature high pressure hydr rolysis with highh h excesss water. By 1 H NMR it was proved that t mainly PA6 dimers were produced.. With lesss harshh conditions, seve eral water non-soluble oligomers were produced. 3

5 Aegean International Textile Advanced Engineering Conference (AITAE 2018) IOP Conf. Series: Materials Science Engineering 459 (2019) doi: / x/459/1/ Polyester production PET monomers Testing PET depolymerisation efficiency according to experimental conditions P, T t PET type (high low viscosity type), with without the present catalyst was carried out. The degreee chemical depolymerisation virgin PET polymers was preliminary determined gravimetrically, by carboxylic group number, FTI IR spectroscopy DSC. After depolymerisation PET textile materials 95 % monomerr (terephthalic acid) wass obtained (proved by 1 H NMR) ). Acknowledge RESYNTEX project received fund ding from the European Union s Horizon research programme unde er grant agreement innovation References [1] JCR Scie entific Technical Report, [2] Gr Agreemnet Number Resynex [3]] Nunes,L..J.R., et al.. J. Clean. Production 171 (2018), [4] Wang g, Y., Recycling in Textiles - 1st Edition. Woodheadd Publishing. 4