Catalysts For Hydrogenation Of Furfural Research Articles

The Support and Bimetallic Synergy Effects in Cu‐Ni/SiO2 Catalysts for Hydrogenation of Furfural

AbstractHerein, a series of Cu, Ni catalysts were synthesized using mesoporous SiO2 (MCM‐41) and fumed SiO2 as supports for the catalytic hydrogenation of furfural (FF). The MCM‐41 support facilitated the high dispersion of Cu, Ni nanoparticles (NPs), and the hydrogenation products are primarily in the form of alcohols. For fumed SiO2, the proper amounts of acid sites contributed to the better selectivity of 2‐methyltetrahydrofuran(2‐MTHF). Hydrogenation results showed that the 10Cu10Ni/MCM‐41 catalyst afforded a 93.6 % yield of tetrahydrofurfuryl alcohol (THFA), while the 10Cu10Ni/SiO2 catalyst afforded a 61.73 % yield of 2‐MTHF and a 31.63 % yield of THFA. Meanwhile, it is also found that impregnating nickel salt before copper salt is more likely to promote the formation of deep hydrogenation products. Cyclic experiments indicate that developing a one‐step hydrogenation process with selective production of fully hydrogenated products is still a daunting and challenging task.

Organodiphosphonate Metal‐Organic Frameworks Derived Ni‐P@C Catalyst for Hydrogenation of Furfural

Tetraethyl p-xylenediphosphate is used as the organic ligand to prepare the Ni−P-MOFs material belonging to the category of organic phosphoric acids, through pyrolysis and in-situ reduction reaction of Ni−P-MOFs material during the high-temperature carbonization process, Ni−P@C catalyst with graphitized carbon-covering Ni2P particles is prepared. Compared with Ni−P catalyst prepared through coprecipitation method, Ni−P@C catalyst prepared with Ni−P-MOFs material can obviously decrease the formation temperature of Ni2P active phase and retain the schistose morphology of the Ni−P-MOFs material, which is of high specific area, and meanwhile effectively suppresses the agglomeration of Ni2P particles. It is indicated by research on furfural hydrogenation performance that, Ni−P@C catalyst presents a high activity and stability in furfural hydrogenation. Products of furfural hydrogenation catalyzed by Ni−P@C catalyst mainly contain furfuryl alcohol, 2-methylfuran and 2-methyltetra hydrofuran, and the reaction temperature and reaction time have great influence on the distribution of products. The carbon-covering structure of Ni−P@C catalyst can effectively protect the active components of Ni2P, thus presenting a high stability and good reusability.