Hydrodeoxygenation of Guaiacol over Al-MCM-41 Supported Metal Catalysts: A Comparative Study of Co and Ni

Effect of the Support Functionalization of Mono- and Bimetallic Ni/Co Supported on Graphene in Hydrodeoxygenation of Guaiacol

“…It can be observed that Ni is less active than Co when supported over both nitrogen-doped and undoped GOr in agreement with previous results over other carbon supports 53 and over Al-MCM-41 or zirconium phosphate (ZrP) or zeolites. 29,33,73 However, better hydrogenation activity of Ni compared to Co has also been reported for SBA-15 based catalysts in the gasphase HDO of anisole 74 and over CeO 2 for in situ hydrogenation using alcohols as hydrogen donors. 75 Moreover, the doped samples display better activity than their undoped counterparts.…”

“…24 Non-noble metals, such as Ni, Cu, and Co-based catalysts, 25−35 also show good performance, are advantageous due to their lower costs, and appear to be highly active for the obtention of cyclohexanol, especially nickel and Co-based catalysts, where Co catalysts were generally more active than Ni 29,33 but more selective toward phenol. 33 However, besides their high activity, Ni catalysts suffer from deactivation 36−39 which was mainly due to coke deposition or metal sintering. 40,41 Typically, to prevent the metal sintering, two strategies can be explored: the use of bimetallic systems 42 or the modification of the support.…”

“…Nevertheless, these types of catalysts are expensive and selective to hydrogenated products that lead to high hydrogen consumption and costs . Non-noble metals, such as Ni, Cu, and Co-based catalysts, − also show good performance, are advantageous due to their lower costs, and appear to be highly active for the obtention of cyclohexanol, especially nickel and Co-based catalysts, where Co catalysts were generally more active than Ni , but more selective toward phenol . However, besides their high activity, Ni catalysts suffer from deactivation − which was mainly due to coke deposition or metal sintering. , Typically, to prevent the metal sintering, two strategies can be explored: the use of bimetallic systems or the modification of the support.…”

Advances in porous and nanoscale catalysts for viable biomass conversion

“…A continuous-flow strategy was developed for the vapor phase HDO of guaiacol over M/Al-MCM-41 (M = Co and Ni) catalysts (entry 6, Table 2). 229 The acidic Al-MCM-41 support stimulates the methyl transfer reaction to obtain methylated products. The Co/Al-MCM-41 catalyst is particularly selective towards C-O hydrogenolysis of guaiacol to obtain phenol.…”

Glycerol Acetylation with Propionic Acid Using Iron and Cobalt Oxides in Al-MCM-41 Catalysts

“…All catalysts sample presented spherical small crystallites alternating between welldefined structures to greater particle nonuniform clusters. This morphology characteristics is typical for Al-MCM-41 and the more aluminum is inserted into the MCM-41 matrix structure itself, the greater the tendency to observe a more dispersed material containing a less defined morphology [52,[62][63][64].…”