Themed collection International Symposium on Green Chemistry 2025

The energy transition faces challenges towards a global resilient energy sector based on renewable energies. We discuss the requirements for the implementation of H₂−/CCUS-based large scale energy storage systems coupled with renewable energies.

The industrial potential of pilot-scale reductive depolymerization approaches is critically assessed from a technical, techno-economic, and application point of view.

Hydroxyapatite was synthesized from eggshell, after dissolution in ascorbic acid, a green, non-toxic reagent. Avoiding thermal treatment permits enhancement of energy efficiency.

Bio-based hyperbranched polymers were used as precursors for the design of self-healing and recyclable pressure sensitive adhesive materials.

A global and sustainable strategy for biobased ethyl formate and methyl formate production from Pelargonium graveolens EO.

Dry reforming of methane (DRM) provides a promising strategy for combating global warming by concurrently converting two greenhouse gases, CH₄ and CO₂, to value-added syngas. The Ni/HTASAO5 catalyst exhibited high activity and stability at 900–1000 °C.

Homogeneously manganese catalyzed methanol synthesis from synthesis gas is achieved under continuous operation with product separation and catalyst recycling via distillation. Molecular deactivation routes are uncovered and effectively counteracted.

Our study addresses a critical challenge in the development of thermally stable, selective, and efficient catalysts for lean methane (CH₄) combustion.

A sustainable and scalable strategy for the glycolytic depolymerization of polyurethane foam (PUF) waste, based on the ionic liquid technology under mild conditions, provides a suitable starting material for re-synthesis of new flexible PUF.

This study identifies low-cobalt blue pigments as sustainable alternatives to traditional CoAl₂O₄, combining a good colouring performance with significantly reduced environmental impacts through Life Cycle Assessment (LCA).

Selective hydrogenation of 2-methyl-3-butyn-2-ol to 2-methyl-3-butene-2-ol in water at room temperature with titania-supported Ni catalysts.

Pseudoionone, obtained from citral, is transformed into 1-methyl-1,3-cyclohexadiene in 31% yield by ring closing metathesis, while 63% yield is achieved using a stereoisomer prepared from neral.

Harmless chemical recycling of polyurethane foams: depolymerization with diethyl carbonate allows deep recovery of both constituting monomers, i.e. polyols and diisocyanates, without requiring phosgene as toxic and wasteful reagent.

Cavitation bubbles, formed by the ultrasonic irradiation of water at a high frequency, induce the catalyst-free N-dealkylation of aniline derivatives, opening an alternative pathway to transition metals and hazardous solvents or oxidants.