Highly active Ce, Y, La-modified Cu/SiO₂ catalysts for hydrogenation of methyl acetate to ethanol

Abstract

Highly active and stable La-modified Cu/SiO2 catalysts were fabricated for the vapor-phase hydrogenation of methyl acetate to ethanol.

Boron Modified Bifunctional Cu/SiO2 Catalysts with Enhanced Metal Dispersion and Surface Acid Sites for Selective Hydrogenation of Dimethyl Oxalate to Ethylene Glycol and Ethanol

“…Zhu et al discovered that the introduction of B 2 O 3 to Cu/SiO 2 could greatly promote the dispersion of Cu species by inhibiting the growth of Cu particles, which could enhance catalytic stability [21]. He et al reported that B-Cu/SiO 2 catalysts exhibit excellent catalytic stability, which was mainly resulting from the strong interaction between B 2 O 3 and surface Cu element, which maintained the suitable Cu 0 /Cu + distribution and restrained the growth of Cu particles [24]. As shown in Table S3, the change in the D Cu of 2B-Cu/SiO 2 catalyst was basically negligible and only dropped from 21.6% to 20.4%.…”

“…Ren et al have introduced La promoter into Cu/SiO 2 catalysts by hydrolysis precipitation method, which showed the outstanding catalytic performance with the Sel. EtOH of 95.8% at 250 • C [24]. However, there are still huge challenges need to be overcome, especially in terms of their poor low-temperature catalytic activity and stability.…”

Recent advances in the routes and catalysts for ethanol synthesis from syngas

“…Rare earth elements, such as Ce, Y or La, were used by Ren et al , to promote Cu/SiO 2 catalysts for MA hydrogenation. 296 They also prepared a La-modified copper phyllosilicate nanotube (Cu-PSNT) catalyst. 297 As a result, they found that the La addition can significantly influence the Cu dispersion and the ratio of Cu + /(Cu + + Cu 0 ), and increase the activity and stability of MA hydrogenation.…”

Efficient Synthesis of Cyclohexanol and Ethanol via the Hydrogenation of Acetic Acid‐Derived Cyclohexyl Acetate with the CuxAl1Mn2−x Catalysts

“…[18][19][20] Secondly, according to the literature, the catalyst life of the Cu-based catalysts for the hydrogenation of acetates in fixed-bed reactors was also very limited. [17,22,23] Most important of all, the hydrogenation of CHA to produce CHOL is a relatively new reaction route and would be very meaningful. Thence, Cu-based catalysts with enhanced catalytic performance including high CHA conversion, high CHOL selectivity and long lifespan were explored based on our previous researches.…”

“…Firstly, the intrinsic ability of the catalysts needs to be further improved because in some cases the conversion or selectivity was below 90 % [18–20] . Secondly, according to the literature, the catalyst life of the Cu‐based catalysts for the hydrogenation of acetates in fixed‐bed reactors was also very limited [17,22,23] . Most important of all, the hydrogenation of CHA to produce CHOL is a relatively new reaction route and would be very meaningful.…”