Isobutane dehydrogenation over high-performanced sulfide V-K/γ-Al2O3 catalyst: Modulation of vanadium species and intrinsic effect of potassium

Compared with industrial used Pt- and Cr-based catalyst in dehydrogenation (DH) of light alkanes, the sulfide V-K/γ-Al2O3 reported this study shows lower cost toxicity, significant DH performance. The yield to isobutene reached as high 52.9%, which is among highest date. We attribute such precise modulation polymerization degree for vanadium species via doping potassium indicating that synergy between acid sites critical enhance Our previous work showed sulfidation promoted increase performance vanadium-based catalyst, we go further explore correlation increased range added potassium. different loaded leads variation degree, affecting properties consequently. was distributed uniformly on surface predominantly bonded rather than γ-Al2O3 support. With increasing amount from 0 3 wt%, kept decreasing, some specific strong appeared once adequate sulfur introduced catalyst. characterization DFT results both revealed doped contributes regulating oligomeric state. regulated by simultaneously, thus enhanced. This provides promising strategy preparation environment-friendly model