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The European bioeconomy strategy revision:An opportunity to go against the tide and secure a sustainable future
No full textIn today's tense geopolitical landscape, marked by strained relations among major powers and deep-rooted dependence on fossil-based economies, the emerging modern bioeconomy can provide resource independence and resilience, in tandem with economic, social, and environmental benefits, and thus has the potential to underpin a sustainable future. The bioeconomy is a vital cross-cutting meta-sector, but it is not inherently circular or sustainable; without intentional design, it risks becoming a linear, unsustainable replacement of the fossil-based economy. Realising its full promise requires purposeful engineering to address climate change, biodiversity loss, strengthen resource independence, support food security and resilience, create jobs, promote social inclusion, boost competitiveness and autonomy, and improve human, animal, and environmental health. The potential is enormous, but so are the challenges society faces in realising the vision for a biobased, nature-positive future.</p
Unsupported CoMoS catalysts for isoeugenol hydrodeoxygenation:optimisation of synthesis parameters for catalyst performance
No full textHydrodeoxygenation of isoeugenol as a model compound for lignocellulosic biomass-derived oils has been studied in this work. A series of unsupported cobalt-doped molybdenum oxide and sulfide catalysts were prepared via hydrothermal precipitation to systematically study the effect of catalyst preparation conditions on catalyst properties and catalytic performance. The effects of the preparation temperature, excess sulfur, and pH and their combinations were studied using a design of experiments approach. The catalysts were characterized with ICP-OES, N2 physisorption, XRD, XPS and SEM-EDS and screened for bio-oil model compound isoeugenol hydrodeoxygenation under relevant process conditions of 300 °C and 30 bar in a batch reactor. Co was observed as a sulfide, while molybdenum exhibited mixtures of the oxide and sulfide, with the former favored under preparation conditions with less sulfur. The catalyst performance testing revealed a higher activity and increased deoxygenation selectivity of the sulfide catalysts compared to those of the oxide catalysts. In addition to the chemical nature, the catalyst activity in the model reaction was increased by the high pore volume and surface area, which were promoted by a low pH at the start of the synthesis. The observed tendencies provide a basis for catalyst tailoring in hydrotreatment processes for biofuel and biochemical production from lignocellulosic biomass.</p