Catalytic tar removal using TiO2/NiWO4-Ni5TiO7 films
Catalytic tar removal using TiO2/NiWO4-Ni5TiO7 films
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DOI：
10.1016/j.apcatb.2019.03.006
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发表时间：
2019-07
期刊：
影响因子：
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通讯作者：
Jing Xu;P. Holthaus;N. Yang;Siyu Jiang;A. Heupel;H. Schönherr;Bingping Yang;W. Krumm;Xin Jiang
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文献类型：
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作者：
Jing Xu;P. Holthaus;N. Yang;Siyu Jiang;A. Heupel;H. Schönherr;Bingping Yang;W. Krumm;Xin Jiang
一维镍催化剂由于其独特的形貌和较高的比表面积，在生物质气化焦油催化脱除方面比镍粉更有前景。在这里，我们展示了一种钛负载的多层膜体系，即TiO2NiWO4-Ni5TiO7薄膜，用于催化脱除焦油。该薄膜是通过等离子体电解氧化(PEO)和随后的浸渍和热处理相结合的方法合成的。合成的Ni5TiO7纳米线的表面形貌和尺寸主要由PEO过程中使用的电解液决定。在催化焦油脱除方面，采用固定床反应器，以萘为模型焦油。结果表明，TiO2NiWO4-Ni5TiO7薄膜具有比热裂解更高的催化效率和较高的催化水蒸气重整反应的长期稳定性。在温度80 0 °C，停留时间短，停留时间为0.34 ，焦油负载量为75 g Mn−3的条件下，萘转化率可达63%。因此，TiO2NiWO4/Ni5TiO7膜在生物质气化焦油脱除方面具有广阔的应用前景。
One-dimensional nickel catalysts are more promising than nickel powders for catalytic tar removal from biomass gasification, originating from their unique morphologies and higher specific surfaces. Herein, we demonstrate the application of a Ti supported multilayer system, namely a TiO2/NiWO4-Ni5TiO7film, for catalytic tar removal. This film is synthesizedviaplasma electrolytic oxidation (PEO) combined with subsequently impregnation and annealing. The surface morphology and the size of as-synthesized Ni5TiO7nanowires are determined mainly by used electrolytes during PEO processes. For catalytic tar removal, a fixed bed reactor is utilized and naphthalene is chosen as a model tar. This TiO2/NiWO4-Ni5TiO7film exhibits higher efficiency than thermal cracking as well as long-term stability towards catalytic steam reformation of naphthalene. A naphthalene conversion rate of 63% is achieved at 800 °C with a short residence time of 0.34 s and a high tar load of 75 g mN−3. Such a TiO2-NiWO4/Ni5TiO7film is thus promising for future tar removal from biomass gasification in the industry.