Comparative Studies of Non-noble Metal Modified Mesoporous M-Ni-CaO-ZrO₂ (M = Fe, Co, Cu) Catalysts for Simulated Biogas Dry Reforming

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• 作者：Changzhen Wang ; Yin Zhang ; Yongzhao Wang and Yongxiang Zhao
• 刊名：Chinese Journal of Chemistry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：35
• 期：1
• 页码：113-120
• 全文大小：1710K
• ISSN：1614-7065

文摘

The present work is aimed to improve the performance of Ni-based catalysts for biogas dry reforming by adding a second non-noble metal (Fe, Co, Cu) into a previously studied mesoporous Ni-CaO-ZrO₂ nanocomposite. Biogas was simulated with equivalent methane and carbon dioxide for the dry reforming reaction. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N₂ adsorption, temperature-programmed reduction (TPR), thermogravimetric analysis (TGA), and transmission electron microscopy (TEM) measurements were taken to characterize the structural and textual properties of the bimetallic catalysts as well as the accumulated carbon deposition. The addition of Fe leads to a less ordering growth of mesopores of Fe-Ni-CaO-ZrO₂ sample, and the existence of Cu results in a relatively larger portion of free NiO in Cu-Ni-CaO-ZrO₂. Compared with Fe and Cu, the presence of Co could efficiently form a beneficial dual metal effect and enhance the strong metal support interaction between Ni and CaO-ZrO₂, thus enhancing the activity and stability of the catalyst in biogas dry reforming reaction.