Design and optimization of Ni–Fe–La based catalytic system for CO2 utilization for sustainable syngas production via dry reforming of methane

Abstract

The present work aims to design a robust Ni–Fe–La catalyst for methane reforming with CO2. A series of catalysts with mesoporous pore structures were prepared using a modified constant pH co-precipitation approach. Taguchi's L16 design and multi-parameter response optimization approach provide a detailed interpretation and optimization of the catalyst composition. The control parameters for the optimization study include nickel as primary active (6–24 wt %), Fe as second metal (0–9 wt%), La2O2 as a promoter to the catalyst (0–24 wt%), and rest γ-alumina as catalyst support (52–94 wt%). Various analytical and chemical methods were used to characterize optimized catalyst recipes thoroughly. According to Study findings, the reforming catalyst quality, measured by reactant conversions, deactivation percentage, and H2/CO ratio, has dramatically increased since the basic testing. The dry reforming catalyst's sustainable activity was primarily driven by the Fe metal content (wt.%), followed by the Ni metal content and La2O3. In 100 h of time on stream study, the catalyst showed excellent stability with ∼90% CH4 conversion, and it was free of any coke deposition as well as severe metal sintering. The improved synthesis method resulted in a catalyst with good physicochemical features, promoting high activity and stability in dry reforming operations.