A Novel Catalyst for the Selective Hydrogenation of Furfural to Furfuryl Alcohol.

Abstract

Furfuryl Alcohol.-MCM-41 supported Cu/La-catalyst with high metal loading level and dispersion degree is prepared via a novel preparative method. The catalyst exhibits high activity and selectivity in the hydrogenation of furfural (I) to furfuryl alcohol (II). -(HAO, X.

Continuous Flow Upgrading of Selected C2–C6Platform Chemicals Derived from Biomass

“…A similar strategy was considered by Liu and coworkers, who doped a Cu/MCM-41 catalyst with La. 622 As a result, excellent conversion (98%) and selectivity (>99%) were obtained after 1 h of operation, probably because of the high electron-donating ability of La, which increased basicity and favored CO hydrogenation (Table 23, entry 19). However, after 8 h TOS, the catalyst lost 32% of its activity.…”

“…Furfuryl alcohol is readily produced at the industrial level from the gas-phase reduction of furfural with hydrogen over Cu-based catalysts . Nevertheless, numerous recent reports in the primary literature were still devoted to the development of new catalysts for the gas-phase reduction of furfural into furfuryl alcohol in the presence of hydrogen. − The main challenge of this reaction is related to the activity of the catalyst, which has to be finely tuned to reduce the aldehyde moiety of furfural only. Catalytic sites endowed with an overly high reducing ability are also prone to further reduce furfuryl alcohol ( 99 ) into 2-methylfuran ( 101 ), tetrahydro­furfuryl alcohol ( 102 ), and 2-methyltetra­hydrofuran ( 103 ) (Scheme ) as well as many other undesired compounds resulting from ring-opening.…”

“…Mild metal catalysts based on supported copper − ,,,,,,,,− or cobalt are typically reported in the literature, while highly reactive hydro­genation catalysts such as supported Ni, ,, Pd, ,, Pt, ,, and Ru are generally avoided. Several authors demon­strated that the perfor­mance of copper catalysts is generally enhanced if they are characterized by both (1) a strong interaction between metallic copper and the support , and (2) the presence of small copper particles (resulting in a high metal dispersion and thus a high metal surface area). ,− ,,,, It was reported that both Cu + and Cu 0 are the active sites in such catalysts, but others refuted this hypothesis and described metallic copper as the only active phase .…”

“…Several authors demon­strated that the perfor­mance of copper catalysts is generally enhanced if they are characterized by both (1) a strong interaction between metallic copper and the support , and (2) the presence of small copper particles (resulting in a high metal dispersion and thus a high metal surface area). ,− ,,,, It was reported that both Cu + and Cu 0 are the active sites in such catalysts, but others refuted this hypothesis and described metallic copper as the only active phase . Copper catalysts suffered from accumulation of organic matter on the active sites/coking as the main deactivation mechanism, ,,,,,− ,,, but Cu sintering ,,, and oxidation ,, were also reported to a lesser extent.…”

Design and control of a process to produce furfuryl alcohol

“…Several authors have studied the hydrogenation of furfural and reported kinetic data and/or kinetic models for the reaction [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. A variety of different types of catalysts have been investigated for the reaction, including copper chromite, copper/sodium silicate and platinum catalysts.…”