Comparative LCA analysis of recycling methods for photovoltaic modules made of CdTe - preliminary research - Project - Bridge of Knowledge

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Comparative LCA analysis of recycling methods for photovoltaic modules made of CdTe - preliminary research

The project aims to conduct a life cycle analysis (LCA) of the delamination processes of modules made of cadmium telluride (CdTe). As part of the project, an assessment of the environmental impact of various delamination processes (thermal and chemical methods) of modules made in thin-film technology from CdTe will be carried out. In order to collect the data needed for the LCA, experiments will be carried out to determine emissions and potential harmful waste generated in the delamination process. Delamination is a key step in the recycling of photovoltaic modules. Delamination methods are divided into three groups: thermal, chemical and mechanical, of which mechanical is usually an introduction to the other two. The research plan includes: 1. Characteristics of samples before and after thermal and chemical delamination. Techniques used: XRF, DSC, TGA and FT-IR. Due to the impact of cross-linking on the parameters of delamination processes, the first samples to be tested will be pieces of EVA foil from various manufacturers. The next series of samples will be fragments of PV modules made in thin-film technology with CdTe in order to determine changes in parameters when the foil is removed from the interior of the module fragments. 2. Thermal delamination and testing of flue gases generated during delamination at different temperatures (400°C-700°C), and measuring the energy used during the process. The samples will be analyzed for cross-linking and composition prior to the decomposition process. The thermal decomposition process will be carried out in an air atmosphere. The waste gases will be collected from the outlet of the tube furnace. 3. Chemical delamination using organic solvents such as toluene (most often used as a reference point in other studies), white spirit, hexane and d-limonene (preliminary studies have confirmed that these solvents can be an effective alternative to toluene). A study will also be conducted to determine the usefulness of individual solvents for repeated use for chemical delamination, by using the same solution multiple times and assessing the process efficiency after a certain number of cycles. 4. The final stage of the project will be the LCA analysis in the SimaPro 7.3.3 program using the EcoIndicator99 and Impact2002+ methods, due to the greatest popularity and the ability to compare the obtained results with those available in the literature.

Details

Project's acronym:
MINIATURA 7
Financial Program Name:
MINIATURA
Organization:
Narodowe Centrum Nauki (NCN) (National Science Centre)
Realisation period:
unknown - unknown
Project manager:
dr inż. Anna Kuczyńska-Łażewska
Realised in:
Department of Energy Conversion and Storage
Request type:
National Research Programmes
Domestic:
Domestic project
Verified by:
Gdańsk University of Technology

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