Abstract
The present research studies the influence of metal ratio on the construction of γ-Al2O3 supported CuxPdy (x + y = 10 wt%) bimetallic catalysts for the hydrogenation of succinic acid (SA) to tetrahydrofuran (THF). Synergistic effects between Cu and Pd due to alloying formation are responsible for the enhanced activity of the bimetallic catalysts compared to the monometallic ones. The Cu-rich CuPd catalysts, particularly Cu8Pd2/γ-Al2O3 and Cu6Pd4/γ-Al2O3, have emerged as the best catalysts for the production of THF with yields of 85–90%. The key factor that distinguishes them from the rest is the presence of isolated Cu components which holds the potential for further reduction of the intermediate γ-butyrolactone while restraining the hydrogenolysis of SA to butyric acid over the Pd sites.
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