No abstract

Hydrogen of a high purity can be produced from the advanced gasification of nonrecyclable mixed plastic wastes (MPW). Due to the fossil nature of MPW, carbon capture and storage (CCS) capabilities need to be employed for the process to be considered a low-carbon hydrogen production route. This study analyzes the environmental performance of a semicommercial process that (a) provides an end-of-life (EoL) for MPW, (b) produces hydrogen as the main product (for sustainable manufacturing, heating, and transport applications), and (c) captures carbon dioxide emissions which are injected into geological sites for permanent sequestration. The climate change impact result is −371 kg CO2 per 1 tonne of MPW treated. The process was competitive against a similarly modeled Waste-to-Energy (WtE) plant coupled with CCSan alternative future end-of-life scenario. WtE with CCS produced a corresponding impact of 17 kg CO2 per 1 tonne of MPW. The two technologies were also compared alongside a decarbonizing electricity grid mix.

The facile light‐driven insertion reaction of oxygen into metal carbon bonds of the BPI (1,3‐bis(2‐pyridylimino)isoindole) complexes [Pt(BPI)Me] and [Pd(BPI)Me] has been investigated by LED‐NMR in CDCl3. The initial insertion reaction leads to peroxo complexes [Pt(BPI)OOMe] and [Pd(BPI)OOMe], which undergo further reactions over time. Spectra were recorded at 1 minute time intervals, which enabled the tracking of the methyl substituent, which eventually generates formaldehyde (and methanediol) and methanol in almost equal proportions. Degradation of the solvent CDCl3 to phosgene and DCl in the presence of oxygen and light leads to several side reactions. DCl reacts with [M(BPI)Me] and [M(BPI)OOMe] to form [M(BPI)Cl], whereas phosgene reacts with in situ generated methanol to chloro methylformate and dimethyl carbonate.