Bio-DEE Synthesis and Dehydrogenation Coupling of Bio-Ethanol to Bio-Butanol over Multicomponent Mixed Metal Oxide Catalysts

• Published in: Catalysts 2021-06, Vol.11 (6), p.660
• Main Authors: Pieta, Izabela S., Michalik, Alicja, Kraleva, Elka, Mrdenovic, Dusan, Sek, Alicja, Wahaczyk, Ewa, Lewalska-Graczyk, Agnieszka, Krysa, Mikolaj, Sroka-Bartnicka, Anna, Pieta, Piotr, Nowakowski, Robert, Lew, Agata, Serwicka, Ewa M.
• Format: Article
• Language: English
• Subjects: Alternative energy sources; Aluminum; Biodiesel fuels; Biofuels; Biogas; Biomass; Butanol; Catalysts; Chemical composition; Chemical reactions; Chemicals; Climate change; Coupling; Crystal lattices; Dehydrogenation; Energy resources; Ethanol; Ethers; Fuel production; Hydroxides; Internal combustion engines; Lattice vacancies; Manganese; Metal oxides; Mixed oxides; Municipal waste management; Process parameters; Production methods; Raw materials; Selectivity; Solid waste management; Solid wastes; Synthesis; Topology; Vapor phases
• ISSN: 2073-4344; 2073-4344
• DOI: 10.3390/catal11060660

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.