Boosted activity of Cu/SiO2 catalyst for furfural hydrogenation by freeze drying

Advancements in the Heterogeneous Catalytic Hydrogenation of Furfural to Downstream Products

“…Their study demonstrated that catalysts synthesized through freeze-drying outperformed those prepared using conventional drying methods and even commercial catalysts, which was mainly due to the fact that freeze-drying could promote the expansion of the pores and improve the dispersion of the Cu particles. [63] While Babu et al utilized γ-radiation to synthesis CuÀ CrÀ Zn mixed oxide catalysts, the dispersion of Cu metal could be significantly improved after γ-radiation compared to the catalysts prepared by conventional methods. [64] This is due to the emergence of hydrotalcitelike structure of the catalyst after γ-ray radiation, which significantly increases the specific surface area of the catalyst.…”

“…took a different approach and enhanced the conventional ammonia evaporation method by incorporating freeze‐drying (FD) techniques in the synthesis of Cu/SiO 2 ‐FD catalyst. Their study demonstrated that catalysts synthesized through freeze‐drying outperformed those prepared using conventional drying methods and even commercial catalysts, which was mainly due to the fact that freeze‐drying could promote the expansion of the pores and improve the dispersion of the Cu particles [63] . While Babu et al utilized γ‐radiation to synthesis Cu−Cr−Zn mixed oxide catalysts, the dispersion of Cu metal could be significantly improved after γ‐radiation compared to the catalysts prepared by conventional methods [64] .…”

Screening of Ni based catalysts supported on metal oxides for liquid-phase hydrogenation of furfural to furfuryl alcohol

“…Due to the high toxicity of traditional copper-chromite catalysts caused by the presence of chromium oxides, 16 the development of new Cr-free catalysts has attracted significant attention for industrial conversion of FAL to FOL. 17 To date, a diverse range of noble metal catalysts (including Pd, Pt, Rh and Ru) [18][19][20][21][22] as well as non-noble metal catalyst (such as Cu, Ni, Co and Fe) [23][24][25][26] have been prepared and investigated for hydrogenation of FAL to FOL in a liquid or vapor phase. Noble metal catalysts often show high activity for FAL conversion, but they are also active to further hydrogenation of FOL resulting in a decrease in the selectivity of FOL.…”