文献类型：期刊文献

英文题名：Promotional Role of Pd Over Ni Catalyst Dispersed Over Sc-ZrO? for Methane Partial Oxidation: Crystallinity and Reducibility Effects

作者：Alwadai, Norah[1]; Acharya, Kenit[2]; Ibrahim, Ahmed A.[3]; Alreshaidan, Salwa Bader[4]; Bayazed, Mohammed O.[3]; Osman, Ahmed I.[5]; Alotaibi, Nawaf N.[6]; Qahtan, Talal F.[7]; Cao, Gui-Ping[8]; Kumar, Rawesh[9]; Al-Fatesh, Ahmed S.[3]

机构：[1] Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, 11671, Saudi Arabia; [2] Department of Chemistry, Indus University, Gujarat, Ahmedabad, India; [3] Chemical Engineering Department, College of Engineering, King Saud University [KSU], Riyadh, 11421, Saudi Arabia; [4] Department of Chemistry, Faculty of Science, King Saud University, Riyadh, 11451, Saudi Arabia; [5] School of Engineering, Technology, and Design, Canterbury Christ Church University, Canterbury, United Kingdom; [6] Institute of Refining and Petrochemicals Technologies, King Abdulaziz City for Science and Technology [KACST], Riyadh, Saudi Arabia; [7] Physics Department, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia; [8] UNILAB, State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, China; [9] Department of Chemistry, Patna Science College, Patna University, Bihar, India

年份：2025

卷号：13

期号：8

起止页码：3935

外文期刊名：Energy Science and Engineering

收录：EI(收录号：20252218500115)

语种：英文

摘要：Natural emissions of the highly potent greenhouse gas methane cannot be completely prevented, but in the presence of O2, methane can be catalytically converted to hydrogen-rich syngas. This reaction is specified as partial oxidation of methane (POM). Herein, Ni dispersed over "scandia-stabilized-zirconia" (5Ni/DSZ) and the promotional effect of Pd (0.01 to 0.1 wt%) are investigated for POM and characterized with surface area and porosity measurements, X-ray diffraction, Raman spectroscopy, temperature-programmed studies, and thermogravimetry. During the POM, the initial population of active Ni sites decreases in non-promoted catalysts due to oxidation under oxygen, upon loading of 0.02 wt.% Pd over 5Ni/DSZ, the active site population is preserved against oxygen during the POM due to improved metal support interaction between Ni and long-range order crystallites of support (like cubic ZrO2 and orthorhombic Sc2Zr5O13). 5Ni0.02 Pd/DSZ catalyst acquired more than 80% catalytic activity (CH4 conversion and H2 yield) with 2.5 H2/CO ratio at 600°C during 240 min on stream. The 5Ni0.02 Pd/DSZ catalyst also maintained more than 70% H2 yield with H2/CO ratio ~2 during 30 h time on stream. The thermostable 5Ni0.02 Pd/DSZ catalyst may be recommended for hydrogen-rich syngas production with high H2-yield through POM. ? 2025 The Author(s). Energy Science & Engineering published by Society of Chemical Industry and John Wiley & Sons Ltd.