Supplementary information to the publication “Approaches to recycling of engine air filters”

This supplementary information contains 7 excel files. The content of the files is explained below:
“1 – Composition of C 26 106” contains the data behind Figure 1.
“2 – True density of filter components” contains the data of the density measurements.
“3 – Degree of liberation” contains the data behind Figure 3e.
“4 – Air classification of process A stage I” contains the data behind Figure 4.
“5 – Air classification of cutting mill products” contains the data behind Figure 5.
“6 – Sink-float separation” contains the data behind Figure 6.
“7 – Recovery rates” contains the data behind Figure 7.

This supplementary information contains 3 folders with photos. The content of the folders is explained below.
“1 – Disassembly of C 26 106” contains photos of the disassembled air filter as additional information to Figure 1. The photos show the connections between the different materials.
 “2 – Zig-zag air classification” contains photos of products of the air classification products for the different processes as additional information to Figures 4 and 5. Exemplarily the settling velocity ranges 1.5-2 m/s, 3-3.5 m/s and 4-4.5 m/s were chosen. The photos show the products before and after manually sorting.
“3 – Sink-float separation” contains photos of the feed and the float and sink products of the sink-float separation experiments of the different processes as additional information to Figure 6.