Citation: LIN Jian-Xin, WANG Guo-Hua, WANG Rong, LIN Bing-Yu, NI Jun, WEI Ke-Mei. Preparation and Characterization of Ru/CNTs-Al₂O₃ Catalyst for Ammonia Synthesis[J]. Acta Physico-Chimica Sinica, ;2011, 27(08): 1961-1967. doi: 10.3866/PKU.WHXB20110812 shu

Preparation and Characterization of Ru/CNTs-Al₂O₃ Catalyst for Ammonia Synthesis

1.
National Research Center of Chemical Fertilizer Catalysts, Fuzhou University, Fuzhou 350002, P. R. China

Received Date: 6 April 2011
Available Online: 14 June 2011
Fund Project: 国家科技支撑计划(2007BAE08B02) (2007BAE08B02)福州大学科技发展基金(2008-XY-7)资助项目 (2008-XY-7)

The purification treatment of carbon nanotubes-alumina was carried out using various oxidizers (ox), such as H₂O₂, concentrated HNO₃, and air. The obtained composite was used as support for ruthenium catalysts. The structures and properties of the products before and after modification were characterized and measured using transmission electron microscopy (TEM), thermogravimetric analysis (TG), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) spectroscopy. The results show that purification modification treatment can remove the impurities on the surface of the CNTs-alumina, shorten the CNTs, and increase the amounts of hydroxyl, carboxyl, and carbonyl groups. Inductively coupled plasma (ICP) analysis shows that the dissolution solution composition of the CNTs-alumina composite supports with HNO₃ oxidation treatment contains 49.98 mg·g^-1 Al. The ammonia synthesis rate of the Ru/CNTs-alumina-H₂O₂ was found to be 39.8 mmol·g^-1·h^-1 at 10 MPa, 10000 h^-1, and 425 °C, which was higher than those for other CNTs-alumina-ox supported Ru catalysts.
- Oxidizer,
- Carbon nanotube,
- Alumina,
- Ammonia synthesis,
- Ruthenium
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沈阳化工大学材料科学与工程学院沈阳 110142

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Preparation and Characterization of Ru/CNTs-Al₂O₃ Catalyst for Ammonia Synthesis