Hydrochar and synthetic natural gas co-production for a full circular economy implementation via hydrothermal carbonization and methanation: An economic approach.

Herein we study the economic performance of hydrochar and synthetic natural gas co-production from olive tree pruning. The process entails a combination of hydrothermal carbonization and methanation. In a previous work, we evidenced that standalone hydrochar production via HTC results unprofitable.

Biomass gasification, catalytic technologies and energy integration for production of circular methanol: New horizons for industry decarbonisation.

The Intergovernmental Panel on Climate Change (IPCC) recognises the pivotal role of renewable energies in the future energy system and the achievement of the zero-emission target. The implementation of renewables should provide major opportunities and enable a more secure and decentralised energy supply system. Renewable fuels provide long-term solutions for the transport sector, particularly for applications where fuels with high energy density are required.

Reforming of biomass-derived producer gas using toluene as model tar: Deactivation and regeneration studies in Ni and K-Ni catalysts.

Within the syngas production from biomass gasification, tar removal constitutes a chief issue to overcome for advanced catalytic systems. This work investigates the performance of Ni and Ni-K catalysts for reforming of derived-biomass producer gas using toluene as model tar. At 750 °C and 60Lgh, the stability test (70 h) revealed stable performances (CO, CH and CH conversions of 60, 95 and 100%, correspondingly) uniquely for the Ni-K catalyst.

Catalytic Upgrading of Biomass-Gasification Mixtures Using Ni-Fe/MgAlO as a Bifunctional Catalyst.

Biomass gasification streams typically contain a mixture of CO, H, CH, and CO as the majority components and frequently require conditioning for downstream processes. Herein, we investigate the catalytic upgrading of surrogate biomass gasifiers through the generation of syngas. Seeking a bifunctional system capable of converting CO and CH to CO, a reverse water gas shift (RWGS) catalyst based on Fe/MgAlO was decorated with an increasing content of Ni metal and evaluated for producing syngas using different feedstock compositions.

Au and Pt Remain Unoxidized on a CeO-Based Catalyst during the Water-Gas Shift Reaction.

The active forms of Au and Pt in CeO-based catalysts for the water-gas shift (WGS) reaction are an issue that remains unclear, although it has been widely studied. On one hand, ionic species might be responsible for weakening the Ce-O bonds, thus increasing the oxygen mobility and WGS activity. On the other hand, the close contact of Au or Pt atoms with CeO oxygen vacancies at the metal-CeO interface might provide the active sites for an efficient reaction.