High Temperature Chlorination Solar Panel Recylcing

Another is hydrochloric acid which is recycled back into the process.

High temperature chlorination solar panel recylcing.

Trichlorosilane is then heated to a much higher temperature 1150 degrees c 2102 degrees f at which point it decomposes. High temperature chlorination and solvent extraction was also tested for separation of copper indium and gallium. Recycling of copper indium gallium diselenide cigs solar cell materials is important to ensure future supply of indium and gallium. During the sustainable materials management smm webinar shining the light on solar panel recycling.

This comes to a total of 8 15 per panel. Disposal of solar panels. In the proposed chlorination process the residue obtained after the separation of selenium is introduced into a furnace at the required reaction temperatures which are 260 and 340 c for gallium and indium respectively. The lifespan of solar panels may thus be much longer than officially stated.

Our previous work includes recycling of selenium from cigs materials and a scoping study on high temperature chlorination for the separation of the remaining elements using different chlorination agents. Solar photovoltaic panels whose operating life is 20 to 30 years lose productivity over time. The solar panel testing parameters are defined as follows. The international renewable energy agency estimated that there were about 250 000 metric tons of solar panel waste in the world at the end of 2016 and that the figure could reach 78 million metric tons by 2050.

The lifespan of high quality pv panels may even reach 30 to 40 years and be still functional afterwards though with decreasing efficacy. As stated above there are presently three different types of recycling process applied to solar pv panels which are physical thermal and chemical as illustrated in fig. Recycling solar cells cigs pyrometallurgy hydrometallurgy. The high temperature chlorination is a separation method relying on the treatment of a material rich in metals with a chlorination agent at high temperatures to form volatile metal chlorides.

One of the products of its decomposition is very pure silicon. As no one is offering to pay for old solar panels or even take them off people s hands for free we can be pretty sure no one has worked out how to do this. By 2050 the united states is expected to have the second largest amount of end of life solar panels after china. Irradiance of 500w m 15 c module temperature zero wind speed and air mass am of 1 5.

Download high res image 352kb. Most efforts related to solar panel recycling concentrate on si panels and aim to recover and recycle the most important parts. Industry experts who have been following developments of end of life solar panel management recently provided an update on solar panel recycling in the u s. 5 so to be financially worthwhile the total cost of recycling a stripped solar panel would have to be less than roughly 8.

From a regulatory aspect pv panel waste still falls under the general waste classification.