K-promoted NiMo catalysts supported on activated carbon for the hydrogenation reaction of CO to higher alcohols: Effect of support and active metal

Tuning of higher alcohol selectivity and productivity in CO hydrogenation reactions over K/MoS2 domains supported on mesoporous activated carbon and mixed MgAl oxide

“…The enhanced C 2+ OH productivity over the MoKC catalyst may be associated with the acidic nature of the carbon support, as suggested from NH 3 TPD (Fig. S5a), supported by the work of Liakakou et al correlating increased CO conversion with increased acidity of a similar catalyst (K-NiMo supported on acid pretreated activated carbon) [32]. The C 3+ OH selectivity trend for the MoKC-MMO catalyst was between that of the MoKMMO and MoKC parent catalysts (Fig.…”

“…It is important to note that the MoKMMO-C catalyst had a slightly higher total hydrocarbon selectivity, resulting in slightly lower C 2+ OH selectivity when compared to the MoKMMO catalyst. The addition of the acidic carbon support to MoKMMO to create MoKMMO-C resulted in increased hydrocarbon formation by promoting dehydration/hydrogenation reactions [32,57].…”

“…Furthermore, Morrill et al noted that carbon supports yielded high methanol and ethanol selectivities [37]. Previous work on mesoporous carbon, prepared at Oak Ridge National Laboratory (ORNL), yielded catalysts with greater alcohol productivity than similar catalysts supported on a commercial activated carbon [32,44,45]. In this work, we seek to evaluate the hypotheses that molybdenum supported on a mixed support comprised of MMO and mesoporous activated carbon may allow for elevated higher alcohol productivity (due to MoS 2 domains on the carbon support) and good higher alcohol selectivity (due to MoS 2 domains on the MMO support), with an emphasis on understanding the MoS 2 structure-reactivity relationships over the carbon/MMO composite supported catalysts.…”

“…Further studies were performed with activated carbon [26][27][28][29][30][31][32] and multi-walled carbon nanotubes (MWCNT) http://dx.doi.org/10.1016/j.jcat.2015.01.015 0021-9517/Ó 2015 Elsevier Inc. All rights reserved. [17][18][19][33][34][35][36] as supports that enhanced productivity due to higher dispersion of MoS 2 domains.…”

Remarkably efficient CoGa catalyst with uniformly dispersed and trapped structure for ethanol and higher alcohol synthesis from syngas

“…However, the high cost and limited availability of Rh restrict its large-scale application in syngas conversion. As an alternative, modified Fischer-Tropsch catalysts based on Co and Fe [22][23][24], as well as Mo-based [25][26][27] catalysts, have been proposed for C 2+ alcohol production from syngas. Because Co has prominent chain growth ability [28] and lower activity toward the water-gas shift (WGS) [29,30], Co-based catalysts have been attracting renewed scientific interest.…”