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Here, we focused on the pyrolysis of printed circuit boards (PCBs) from used computers using various combined procedures of thermal and catalytic pyrolysis and dehalogenation (absorption) aiming to obtain pyrolysis oils with low amounts of heteroatoms (Br, Cl, N, and O) that might be suitable for use as fuel or feedstock. The composition of degradation oils was established by suitable methods, such as gas chromatography (GC−MSD and GC−AED), 1H nuclear magnetic resonance (NMR), and Fourier transform infrared spectroscopy (FTIR), and common methods for the analysis of petrochemical products. It has been found that catalytic cracking and dehalogenation procedures are simple and effective methods to convert PCBs into some useful products.

The multitude of chemically reactive species that are involved in plasma polymerization process make difficult to anticipate how the polymer will look like. In order to prepare polymerized films with imposed properties a good control over the plasma polymerization reaction should be done. In this paper, we investigate plasma polymerization reactions of aromatic compounds using a cold atmospheric pressure glow discharge working in helium. The structure of polymerized films was determined using infrared spectroscopy, X‐ray photoelectron spectroscopy, and nuclear magnetic resonance spectroscopy. Furthermore, the results of spectroscopic analyses allowed us to develop a polymerization mechanism from a chemical point of view related to formation of plasma‐polymerized films. magnified image