湍流效应在火焰合成纳米TiO2颗粒工业化规模放大中具有重要影响.本文基于一种内加环形旋流片的弱旋火焰开展了合成TiO2纳米颗粒的实验研究.对于内径12 mm管式燃烧器,加入旋片后火焰贫燃极限大幅度降低16%～33%,火焰高度也从9.0 cm减少到3.0 cm,焰区温度约减少20%～30%.研究表明,弱旋湍流火焰具有流速大、可燃当最比低和温度低的特点,使其相对无旋火焰可以合成粒径较小、烧结程度较低的TiO2纳米颗粒.
参考文献
| [1] | Schimmoeller B;Schulz H;Pratsinis S E et al.Ceramic Foams Directly-Coated with Flam-Made TiO2/V2O5 for Synthesis of Phthalic Anhydride[J].Journal of Catalysis,2006,243:82-92. |
| [2] | StarkW J;WegnerK;Pratsinis SE.Flame Aerosol Synthesis of Vandia-Titania Nanoparticles:Structural and Catalytic Properties in the Selective Catalytic Reduction of NO by NH3[J].Journal of Catalysis,2001:182-191. |
| [3] | Sotiris E. Pratsinis .Flame aerosol synthesis of ceramic powders[J].Progress in energy and combustion science,1998(3):197-219. |
| [4] | Nargaret S. Wooldridge .Gas-phase combustion synthesis of particles[J].Progress in energy and combustion science,1998(1):63-87. |
| [5] | Hendrik K.Kammler;Lutz Madler;Sotiris E.Pratsinis .Flame Synthesis of Nanoparticles[J].Chemical Engineering & Technology: Industrial Chemistry -Plant Equipment -Process Engineering -Biotechnology,2001(6):583-596. |
| [6] | Ehrman S H;Friedlander S K;Zachariah M R .Characterization of SiO2/TiO2 Nano-Composite Particles Formed in a Pre-Mixed Flat Flame[J].Journal of Aerosol Science,1998,29:687-706. |
| [7] | Spicer P T;Chaoul O;Tsantilis S et al.Titarda Formation by TICl4 Gas-Phase Oxidation Surface Growth and Coagulation[J].Journal of Aerosol Science,2002,33:17-34. |
| [8] | Wegner K;Pratsinis S E .Gas-Phase Synthesis of Nanoparticles:Scaleup and Design of Flame Reactors[J].Powder Technology,2005,150:117-122. |
| [9] | Xing Y;Koylu U O;Rosner D E .Synthesis and Restructuring of Inorganic Nano-Particles in Counterflow Diflusion Flames[J].Combustion and Flame,1996,107:85-102. |
| [10] | Bedat B;Cheng R K .Experimental Study of Premixed Flames in Intense Isotropic Turbulence[J].Combustion and Flame,1995,100:485-494. |
| [11] | Peters N.Turbulent Combustion[M].Cambridge,2000:1-30. |
| [12] | Law C K.Combustion Physica[M].Cambridge,2006:346-350. |
| [13] | Robert N.Grass;Stavros Tsantilis;Sotiris E.Pratsinis .Design of High-Temperature,Gas-Phase Synthesis of Hard or Soft TiO_2 Agglomerates[J].AIChE Journal,2006(4):1318-1325. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%