Microscopic Phase Structure of Mo-based Catalyst and Its Catalytic Activity for Soot Oxidation
Microscopic Phase Structure of Mo-based Catalyst and Its Catalytic Activity for Soot Oxidation
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钼基催化剂微观相结构及其烟灰氧化催化活性
DOI：
10.9767/bcrec.11.3.608.389-397
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发表时间：
2016-10
影响因子：
1.5
通讯作者：
Deqing Mei
中科院分区：
文献类型：
--
作者：
Congwei Mei;Yinnan Yuan;Xianming Li;Deqing Mei
采用浸渍法制备了负载率分别为5%、10%、20%和40%的纳米TiO2负载MoO3催化剂。采用Brunner-Emmet-Teller、傅里叶变换红外光谱、x射线衍射和扫描电镜对MoO3/TiO2纳米级催化剂的相结构进行了表征。在热重分析系统中测定了催化剂对柴油烟尘的氧化活性。采用Starink法对催化氧化过程进行动力学分析。表征结果表明，TiO2负载MoO3的相结构很大程度上取决于钼的含量，钼的含量对烟尘氧化有很大影响。当MoO3含量超过10%时，催化剂表面出现正交晶系（α-MoO3）。由于MoO3的熔点低，表面迁移率好，随着MoO3含量的增加，催化活性提高，特征温度降低。结果表明，不同负载率的催化剂对烟尘氧化的活性可分为：Mo5修订日期：2016年8月30日；引用方式：Mei， C, Yuan， Y, Li， X., Mei， D.（2016）。钼基催化剂的微观相结构及其对煤烟氧化的催化活性。化学反应工程通报
The MoO3 catalysts supported on nano-scale TiO2 with various loading rates (5%, 10%, 20%, and 40%) were prepared by an impregnation method. The phase structures of nano-scale MoO3/TiO2 catalysts were characterized by Brunner-Emmet-Teller, Fourier Transform Infrared Spectra, X-ray Diffraction, and Scanning Electron Microscope. The oxidation activities of catalysts over diesel soot were performed in a Thermogravimetric Analysis system. The kinetics of the catalytic oxidation process was analyzed based on Starink method. The characterization results showed that the phase structure of MoO3 supported on TiO2 depends heavily on the molybdenum contents, which put great effects on soot oxidation. The orthorhombic crystal system (α-MoO3) appeared on the surface of the catalysts when the MoO3 exceeds 10%. Due to the low melting point and good surface mobility of MoO3, the catalytic activity was increased and the characteristic temperatures were decreased with the increase in MoO3 contents. As a result, the activities of catalysts with different loading rates for soot oxidation can be ranked as: Mo5 Received: 19th July 2016; Revised: 30th August 2016; Accepted: 9th September 2016 How to Cite: Mei, C., Yuan, Y., Li, X., Mei, D. (2016). Microscopic Phase Structure of Mo-based Catalyst and Its Catalytic Activity for Soot Oxidation. Bulletin of Chemical Reaction Engineering &
Catalysis , 11 (3): 389-397 (doi:10.9767/bcrec.11.3.608.389-397)
Permalink/DOI: http://doi.org/10.9767/bcrec.11.3.608.389-397
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影响因子：
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