Selective hydrogenation of furfural to tetrahydrofurfuryl alcohol over Ni/CNTs and bimetallic Cu Ni/CNTs catalysts

Metal Catalysts for the Efficient Transformation of Biomass‐derived HMF and Furfural to Value Added Chemicals

“…Similarly,b imetallic Cu-Ni catalystw as also reported for the efficient total hydrogenation of furfural to THFAL. [71] Study demonstrated thatb imetallic Cu-Ni/CNT catalyst displayed higher activity towards furfural hydrogenation compared to the monometallic Ni/CNT at 30 bar H 2 and 100 8C in 10 h, while the selectivity for THFALw as higherf or Ni/CNT (90.5 %) compared to the bimetallic Cu-Ni/CNT (85.3 %). Results also inferred that with the increasei nN il oading, catalytic ac-tivity of the resultingc atalysta lso increased because of the increment in active catalytic sites, whileafurther higher amount of Ni led to the aggregation of active Ni particles andh ence adversely affected the catalystp erformance.…”

“…Unlike Cu‐based catalysts, Ni catalysts exhibited over hydrogenation and ring opening of furan derivatives . Nakagawa et al.…”

“…Study inferred that the metallic Ni is the active site for the hydrogenation reaction, whereas surface basic sites near metallic Ni interacted with the π* acceptor orbital of C=O bond and facilitated feasible adsorption of furfural on the catalyst surface. Similarly, bimetallic Cu‐Ni catalyst was also reported for the efficient total hydrogenation of furfural to THFAL . Study demonstrated that bimetallic Cu‐Ni/CNT catalyst displayed higher activity towards furfural hydrogenation compared to the monometallic Ni/CNT at 30 bar H 2 and 100 °C in 10 h, while the selectivity for THFAL was higher for Ni/CNT (90.5 %) compared to the bimetallic Cu‐Ni/CNT (85.3 %).…”

“…Unlike Cu-based catalysts, Ni catalysts exhibited over hydrogenationa nd ring opening of furan derivatives. [47,[66][67][68][69][70][71][72][73][74] Nakagawa et al attained highery ield (94 %) of the completely hydrogenatedp roduct, tetrahydrofurfuryl alcohol (THFAL), from the gas phase hydrogenation of furfural over Ni/SiO 2 at 413 K. [66] Study also revealed that the hydrogenation of furfural to furfuryl alcohol was preferred over furfuryl alcohol to THFALc onversion, because of the strong adsorption of furfural over catalyst surfacecompared to furfuryl alcohol ( Figure 3).…”

Microwave‐Assisted Selective Hydrogenation of Furfural to Furfuryl Alcohol Employing a Green and Noble Metal‐Free Copper Catalyst

“…[8] FOL is currently produced on industrial scale by liquid-o rv apor-phase hydrogenation of FALe mploying ac opper chromite catalyst, with an annualp roduction of 400 000 t. [9] The main drawbacks of the current process are: the toxicityo ft he catalystu sed;r elativelyh igh pressures of H 2 , in case of liquid-phase hydrogenation;a nd high temperatures, meaningh igh energyc onsumption for the vapor-phase hydrogenation. [9] The majority of the scientific papers addressing the production of FOL either use harsh conditions; [10][11][12][13][14][15][16][17] highp ressures of H 2 ; [14,18] or noble metals, [19][20][21] which are becoming scarce, more expensive, and raise many sustainability concerns.K yriakou and co-workers. [7] recently tested Pt nanoparticles supported on g-Al 2 O 3 ,S iO 2 ,C eO 2 ,a nd ZnO, obtaining 80 %c onversion of FALa nd 99 %s electivity to FOL after 7hat 50 8Cu sing methanol as solventa nd Pt/g-Al 2 O 3 as catalyst.…”