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为了开发一种新型纳米氧化镍催化剂,能有效地应用于生物质气化过程中去除焦油,本文采用均匀沉淀法成功地制备了纳米氧化镍晶体,并利用TGA、FTIR、XRD、BET、TEM等分析手段对前驱体和产品的性能进行了表征。同时,对前驱体的分解过程进行了全面的分析。分析结果表明前驱体是水合碱式碳酸镍,其分子式为NiCO3.Ni(OH)2.nH2O,它能在360℃下完全分解转化为纳米NiO,同时煅烧条件对合成纳米NiO的晶体粒径影响很大。实验证实所得纳米NiO颗粒呈球形,分散性好,纯度较高,属立方晶系结构,平均粒径约为7.5nm,其BET表面积为187.98m2/g,这显示纳米NiO晶体具有作为高效催化材料的应用可行性。
In order to develop a new type of nano-nickel oxide catalyst, it can be effectively applied to remove tar in the process of biomass gasification. In this paper, nano-sized nickel oxide crystals were successfully prepared by homogeneous precipitation method. TGA, FTIR, XRD, BET, TEM etc. The analytical tools characterize the performance of precursors and products. At the same time, the precursor decomposition process has been analyzed comprehensively. The results show that the precursor is basic hydrated nickel carbonate with the molecular formula of NiCO3.Ni (OH) 2.nH2O, which can be completely decomposed into nanometer NiO at 360 ℃, and the influence of calcination conditions on the crystal grain size of nanometer NiO Great. Experiments confirmed that the resulting nano-NiO particles were spherical, good dispersion, high purity, is a cubic crystal structure, the average particle size of about 7.5nm, the BET surface area of 187.98m2 / g, which shows that nano-NiO crystals have high catalytic properties as a material Application feasibility.