Details

Autor(en) / Beteiligte

• Mallikarjun, G.
• Kumari, Rashmi
• Chandrashekar, P.
• Yedukondalu, N.
• Soujanya, Y.
• Sumana, C.
• Lingaiah, N.

Titel

CO 2 ‐Steam Bi‐Reforming of Methane Over La 1−x Sr x Ni 0.8 Zr 0.2 O 3 Perovskite Catalysts to Generate Hydrogen Rich Syngas

Ist Teil von

• ChemistrySelect (Weinheim), 2024-05, Vol.9 (18)

Erscheinungsjahr

2024

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Abstract The present study proposes La and Sr‐containing La 1−x Sr x Ni 0.8 Zr 0.2 O 3 (x=0.1, 0.2, 0.4, 0.6, 0.8) perovskites as potential catalysts for bi‐reforming of methane (BRM) with CO 2 and steam to produce hydrogen rich syngas. The catalysts were prepared by sol‐gel method and characterized using various techniques such as XRD, H 2 ‐TPR, BET, CO 2 ‐TPD and CHNS analysis. The characterization studies revealed that metal‐support interaction increased with the increase in the composition of Sr and the reduction behavior of Ni found to vary with the addition of Sr. The total energy calculations reveal that the addition of Sr to the LNZ system shirnks the volume due to low atomic and high ionic radii of Sr over La, which increases the total energy of system driving towards instability with increasing doping concentration of Sr. CO 2 ‐TPD results suggest that a small amount of Sr can change the basicity of the support. The BRM activity results revealed that La 0.8 Sr 0.2 Ni 0.8 Zr 0.2 O 3 perovskite is the most promising and active catalyst. The proposed catalysts are found to be advantageous w.r.t less carbon deposition due to the increased dispersion, small crystalline size, and required basicity of the support. The disclosed catalyst has shown excellent stability for a studied period of 100 h.