Syngas production from the partial oxidation of (bio)ethanol (POE) was demonstrated. For this purpose, Pt or Ni with different metal loading supported on CeSiO_x were used as catalysts. The catalytic performance was studied in the 600–800 °C temperature range and with oxygen-to-ethanol molar ratios of 0.5 and 0.75. The highest ethanol conversion and H₂ and CO selectivities were achieved at 800 °C. As byproducts, small amounts of CH₄, C₂H₄O, and C₂H₄ were found, and their selectivity decreased with increasing the reaction temperature. Carbon formation during POE at 800 °C on these catalysts followed the order: 1Pt/CeSiO_x < 5Ni/CeSiO_x < 1Pt5Ni/CeSiO_x < 10Ni/CeSiO_x < 1Pt10Ni/CeSiO_x. Therefore, 1Pt5Ni/CeSiO_x presented the best performance for the POE reaction at 800 °C, with low byproduct formation and carbon deposition, thus evidencing the cooperative effect of the support and the synergic effect between the Pt and Ni particles.

Within the Waste2Fuel project, innovative, high-performance, and cost-effective fuel production methods from municipal solid wastes (MSWs) are sought for application as energy carriers or direct drop-in fuels/chemicals in the near-future low-carbon power generation systems and internal combustion engines. Among the studied energy vectors, C₁-C₂ alcohols and ethers are mainly addressed. This study presents a potential bio-derived ethanol oxidative coupling in the gas phase in multicomponent systems derived from hydrotalcite-containing precursors. The reaction of alcohol coupling to ethers has great importance due to their uses in different fields. The samples have been synthesized by the co-precipitation method via layered double hydroxide (LDH) material synthesis, with a controlled pH, where the M(II)/M(III) ≈ 0.35. The chemical composition and topology of the sample surface play essential roles in catalyst activity and product distribution. The multiple redox couples Ni²⁺/Ni³⁺, Cr²⁺/Cr³⁺, Mn²⁺/Mn³⁺, and the oxygen-vacant sites were considered as the main active sites. The introduction of Cr (Cr³⁺/Cr⁴⁺) and Mn (Mn³⁺/Mn⁴⁺) into the crystal lattice could enhance the number of oxygen vacancies and affect the acid/base properties of derived mixed oxides, which are considered as crucial parameters for process selectivity towards bio-DEE and bio-butanol, preventing long CH chain formation and coke deposition at the same time.

Binary Al–Ti, Al–Zr and Al–Zn oxides, prepared by the sol–gel method were used as supports of catalytic systems. The catalysts were prepared by impregnation of these supports with the low cost Co or Ni nitrate salts and subsequent calcination at 700 °C. Catalysts have been characterized by S_BET, XRD and TPR techniques. The catalysts were tested in ethanol partial oxidation using a fixed-bed quartz reactor at atmospheric pressure and temperature at 600 °C. In test reactions a constant feed composition was used with O₂/EtOH molar ratio of 0.75 in nitrogen balance. The catalytic performance of the systems depends on type of support and type of promoter. Hydrogen and CO are the predominant products beside some by-products in different quantities (CO₂, methane, ethylene, acetaldehyde, acetone, acetic acid). The Co and Ni catalysts supported on AlZn binary oxide showed the highest selectivity to hydrogen and to carbon monoxide with full ethanol conversion. Selectivity of hydrogen follows the order of Co(Ni)AlZn > Co(Ni)AlTi > Co(Ni)AlZr. The best performance was obtained by NiAlZn catalyst with 89 % hydrogen selectivity.

The catalytic hydrogenation of carbon dioxide (CO₂) to light olefins provides a sustainable route for producing key chemical intermediates and reducing dependence on fossil-based feedstocks. In this study, FeK, FeCoK, and FeCuK catalysts supported on ZrO₂ were synthesized by a simple wet impregnation method and evaluated for CO₂ hydrogenation. The goal of the study was to understand how secondary metal promoters (Co or Cu) influence the structural and electronic properties of K-promoted Fe/ZrO₂ catalysts and how these modifications affect CO₂ conversion and product selectivity. Among the catalysts tested, FeCoK/ZrO₂ showed the highest performance, achieving around 40% CO₂ conversion and 30% light-olefin selectivity, compared with 40% conversion and 22% selectivity for FeCuK/ZrO₂ under identical conditions (400 °C, 3 MPa, H₂/CO₂ = 3). The FeCuK catalyst exhibited higher CO yield, suggesting enhanced reverse water–gas shift (RWGS) activity, while Co promotion facilitated the formation and stabilization of iron carbides, improving chain growth and olefin selectivity. These findings demonstrate that the addition of Co or Cu effectively tunes the competition among RWGS, methanation, and hydrocarbon chain-growth pathways. Furthermore, the simple impregnation method yielded catalytic behavior comparable to more complex synthesis approaches, highlighting its potential scalability for CO₂-to-olefin conversion.