(521dg) Dry Methane Reforming for Sustainable Syngas Production By Optimizing Ni-Fe-La Based Catalytic System

The objective of the work is to design a Ni-Fe-La catalyst for dry reforming of methane utilizing CO₂. A modified constant pH co-precipitation technique was used to prepare catalyst with mesoporous pore structure. The optimization of the catalyst composition is provided by Taguchi’s L16 design and multi-parameter response optimization approach. The control parameters for an optimization investigation comprise Ni 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.%). The optimized catalyst was thoroughly characterized by different chemical and analytical methods. It is found that the reforming catalyst quality, measured by reaction conversion, H₂/CO ratio, and deactivation percentage has significantly increased since the basic testing. The dry reforming catalyst's sustainable activity was mainly determined by the Fe content (wt.%), followed by the Ni metal content and La₂O₃. The catalyst exhibited excellent stability with nearly 90% CH₄ conversion, and it was free of any coke deposition in 100 h of time on stream study. The improved synthesis technique yields a catalyst with enhanced physicochemical properties, supporting high activity and stability in dry reforming operations.