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| 1 | CuO-ZnO/γ-Al2O3催化剂分解N2O的性能研究显示文摘以CuO为活性组分、ZnO为助剂、γ-Al_2O_3为载体,采用等体积浸渍法制备了一系列CuOZnO/γ-Al_2O_3型直接分解N_2O催化剂,考察了活性组分和助剂含量、烟气工况对催化剂分解N_2O活性的影响,开展了催化剂的稳定性测试,并对催化剂进行了表征.结果表明:CuO质量分数为15%时催化剂的分解活性最高,ZnO助剂的掺入可以明显提高催化剂对N_2O的转化率,烟气中O2和H_2O的存在则会抑制催化剂的活性.15Cu-30Zn/γ-Al_2O_3催化剂在650℃、空速为21 000h^(-1)、含O_2和H_2O的烟气条件下,在100h的连续测试中,N_2O转化率稳定维持在90%以上,具有良好的高温抗氧和抗水蒸气抑制性能以及稳定性. | 马帅 陆强 蔺卓玮 刘宇 李文艳 董长青 | 2017 | 动力工程学报2017，37，9： | 5 |
| 2 | Genesis of nanocrystalline Ho_2O_3 via thermal decomposition of holmium acetate: Structure evolution and electrical conductivity properties显示文摘This study focuses on the preparation of nanostructured holmium oxide via the decomposition of holmium acetate precursor utilizing the non-isothermal strategy. Thermogravimetric analysis(TGA) was used to follow up the various thermal events involved in the decomposition process. Dehydration completes approximately at 150℃, which is followed by the decomposition of the anhydrous acetate leading to the formation of holmium oxide. Based on the TGA results the acetate precursor was heated non-isothermally at the temperature range of 150 e700℃. The obtained solids were characterized using powder X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), Fourier transform infrared spectroscopy(FT-IR), field-emission scanning electron microscopy(FE-SEM) and transmission electron microscopy(TEM). It is found that nanocrystalline Ho_2 O_3 starts to form at 500℃ and presents the only phase detected at the 500 e700℃ range. The electrical conductivity of the solids that form at the temperature range of 300 e700℃ was investigated. The obtained values were correlated with the observed structural modifications accompanying the heat treatment. The electrical conductivity of the Ho_2 O_3 samples prepared at 500, 600 and 700℃ reaches the values of 1.92 × 10^(-7), 1.61 × 10^(-7) and 8.33 × 10^(-8) Ω^(-1)cm^(-1) at a measuring temperature of 500℃, respectively. These values are potentially advantageous for high-resistivity devices. | Bahaa M.Abu-Zied Abdullah M.Asiri | 2019 | Journal of Rare Earths2019，37，2： | 0 |
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