The promotion effects of Pd on Fe–Cu–Co based catalyst for higher alcohols synthesis

Fast and Reproducible Testing of Cu–Co-Based Catalysts Applied in the Conversion of Synthesis Gas to Ethanol and Higher Alcohols

“…In accordance to the recent literature on Cu-Co-based HAS catalysts the degree of CO conversion was quite low [12,13]. However, Cu-Co-based catalysts with very high degrees of CO conversion (X CO [ 80 %) and alcohol selectivities of 59 % achieved under similar conditions can be found in literature [14]. According to our experience such high values seem to be unrealistic.…”

Effects of Cu/Fe ratio on structure and performance of attapulgite supported CuFeCo-based catalyst for mixed alcohols synthesis from syngas

“…Compared with the reduction of CuO phase in the SiO 2 supported catalysts reported by other studies [4,20,21,35], the CuO phase in attapulgite supported catalyst shows much higher reduction temperature due to higher interaction between Cu species and attapulgite support. However, other catalysts present the main peak with one shoulder peak appeared at 225-425 • C, and the shoulder peak is corresponding to the reduction of CuFe 2 O 4 to Cu and Fe 2 O 3 [36]. With the gradual decrease of Cu/Fe ratio the reduction peak intensity of CuO decreases significantly due to the decrease of copper content ( Table 1).…”

Highly active and selective CoCu/ZnO catalysts prepared by mild oxalic acid co-precipitation method in dimethyl oxalate hydrogenation

“…Additionally, broad desorption peaks in the high temperature (HT) range from 300 to 700°C originate from strongly chemisorbed hydrogen H(a) [27]. These results show that the Cu dopant can reduce the H 2 activation ability of Co, and the calcination temperature has a significant effect on the amount of co-active Co-Cu sites exposed, determining the H 2 activation capability [25].…”

“…As the calcination temperature increased to 450°C, the LT peaks shifted to higher desorption temperatures and exhibited two new overlapped desorption peaks at 157°C and 190°C with the strongest intensity, implying the maximum new active sites exposed [22]. The new active sites with reduced H 2 activation ability can be considered as co-active Co-Cu sites, originating from the reduced Cu-Co binary oxide [25,26]. Whereas, further elevating the calcination temperature resulted in the intensity of the LT peaks weakening, meaning less co-active Co-Cu sites exposed.…”