跳到主要內容

臺灣博碩士論文加值系統

(54.173.214.227) 您好!臺灣時間:2022/01/29 14:53
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

: 
twitterline
研究生:陳泓旭
研究生(外文):Hung-Hsu Chen
論文名稱:正丁醇與水在帶電奈米微粒上之非均勻相核凝
論文名稱(外文):Heterogeneous Nucleation of N-Butanol and Water Vapor on Nanoparticles
指導教授:陳進成陳進成引用關係
指導教授(外文):Chin-Cheng Chen
學位類別:碩士
校院名稱:國立成功大學
系所名稱:化學工程學系碩博士班
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:79
中文關鍵詞:電噴霧去除核凝微粒奈米
外文關鍵詞:nucleationparticlenanoelectrospraycondensation
相關次數:
  • 被引用被引用:3
  • 點閱點閱:262
  • 評分評分:
  • 下載下載:26
  • 收藏至我的研究室書目清單書目收藏:0
奈米固體微粒是造成空氣污染的重要來源,這些微粒由於粒徑小且重量輕,可在大氣中飄浮甚久,降低能見度,甚至危害人體健康。然而迄今在帶電微粒上之核凝機構以及理論仍未充份了解;對於實驗值與理論值之比較也甚缺乏。本研究以流動型雲霧室來探討水蒸汽以及正丁醇蒸汽在SiO2以及TiO2帶電微粒上的核凝現象。在雲霧室中過飽和蒸汽以微粒為凝結核,冷凝長大成小液滴,因重力而去除。藉由量測去除效率隨過飽和度之變化配合理論分析求出臨界過飽和度。

由實驗結果的可以得知,在直徑15nm以上的次微米微粒上,水蒸氣發生非均勻相核凝之的臨界過飽和度並不會隨著微粒是否帶電正或負電荷而有所影響。另外本研究引進電噴霧系統生產奈米微粒,然而卻因為系統設計不良導致這套生產裝置沒有達到預期的效果。
Nano solid particles are one of important contributors to air pollution. These particles have long airborne lifetimes largely responsible for reduced visibility through urban air and possess potential health hazard. The physical processes involved in the heterogeneous nucleation of supersaturation vapor on of charge particles are not fully understood.

A systematic study on the heterogeneous nucleation of vapor on TiO2 and SiO2 charged particles is proposed employing a flow cloud chamber (FCC). Supersaturated water or n-butanol vapor condenses onto the particles, which grow up to larger sizes and settle out with appreciable velocities. The critical supersaturation required for a nucleation rate of one on a particle is obtained from the measurement of the removal efficiency a function of supersaturation in conjuction with a theoretical analysis.

The experimental results show that there is no charge effect and sign preference on the critical supersaturation for SiO2 particles with a diameter larger than 15nm. This experimental employ a new nanoparticle generation system, i.e. electrospray system, to product nanoparticles. Because of defects in the system design, the electrospray system didn’t work as expected.
目錄
中文摘要Ⅰ
英文摘要Ⅱ
目錄Ⅲ
圖目錄VI
表目錄Ⅸ
第一章 緒言 1
1.1 簡介1
1.2 文獻回顧2
1.3 研究方法4

第二章 理論分析 6
2.1 核凝理論6
2.1.1 不可溶中性微粒ΔG之計算8
2.1.2 不可溶帶電微粒ΔG之計算13
2.2 雲霧室中溫度與濃度分佈15
2.3電噴霧(Electrospray)工作機制16
2.4 電噴霧操作條件21

第三章 實驗系統及操作 24
3.1 實驗系統24
3.1.1 微粒產生器(Aerosol generator) 27
(a) CVD法27
(b)電噴霧法(Electrospray) 29
(一)電噴霧單元30
(二)溶液供給系統30
(三)監視觀察視窗31
3.1.2 電力篩選器(Electrostatic Classifier)35
3.1.3 微粒電荷中和器(Aerosol Neutralizer)38
3.1.4 電場收集器(Electrostatic
Collector)38
3.1.5 流動型雲霧室(Flow Cloud Chamber)41
3.1.6 超細微粒凝結核計數器(Ultrafine Condensation Nuclei Counter) 44

3.2 實驗步驟44
3.2.1 去除效率實驗44
3.2.2 電噴霧系統操作步驟49


第四章 實驗結果與討論51
4.1 角椎-噴射模式(Cone-jet mode)的判定51
4.2 電噴霧系統出口微粒粒徑分析52
4.3去除效率的空白實驗55
4.4 去除效率之實驗結果61
4.4.1 帶電SiO2與TiO2微粒之去除效率實驗結果61
4.4.2臨界過飽和度之探討68
第五章 結 論73
參考資料 75
1.W. C. Hinds, “Aerosol technology,” Wily, New York, (1982).

2.Sir J. J. Thomson, “Electricity study through gases,” 3rd. Ed., Vol1. 320-333 pp.

3.Kusaka, Z. G. Wang, and J. H. Senjeld, "Ion-induced nucleation II. polarizable multipolar molecules," J. Chem.Phys. 103(20), 899(1995).

4.C. T. R. Wilson, “Condensation of water vapor in the presence of dust-free air and other gases,” Phil. Trans. 189(A), 265(1897).

5.陶君儒, “水蒸氣在SiO2、TiO2、葡萄糖與麩胺酸鈉次為米微粒上之非均勻相核凝”, 博士論文, 國立成功大學,(2000).

6.L. B. Loeb, A. F. Kip and A. W. Einarsson, “On the nature of ionic sign perference in C. T. R. Wilson cloud chamber condensation experiments,” J. Chem Phys., 6, 265(1938).

7.T. Seto, K. Okuyama, L. de Juan, F. de la Mora, “Condensation of supersaturation vapors on mono valent and divalent ions of varying size” , J. Chem. Phys. 107(5), 1576 (1997).

8.K. C. Russell, “Nucleation on gaseous ions,” J. Chem. Phys., 50, 1809(1969)

9.D. Stachorska, “Condensation of supersaturated vapor,” J. Chem. Phys., 42, 1887(1965).

10.A. I. Rusanov, and F. M. Kuni, “Reformulation of the thermodynamic theory of nucleation on charged particles,” J. Colloid Interface Sci., 100,264(1984).

11.C. L. Briant and J. J. Burton, “Molecular Dynamics Study of the effects of ions on water microclusters,” J. Chem. Phys., 64, 2888(1976).

12.S. H. Suck, “Change of free energy in heteromolecular nucleation: electrostatic energy contribution,” J. Chem. Phys., 75, 5090(1981).
13.H. Rabeoy and P. Mirabel, “Vapor nucleation on ions,” Journal de chimie physique, 83(n4) ,219 (1986).

14.L. Y. Chan and V. A. Mohnen, J. Atmos., Sci., 37,233(1980).

15.Gomez, D. Bingham, L. de Juan and K. Tang, “Production of protein nanoparticles by electrospary drying,” J. Aerosol Sci. 29(5/6), 561(1998).

16.郭明升,"水蒸氣在不溶性無機次微米微粒上之非均勻相核凝現象',碩士論文,國立成功大學化工系,(1995).

17.蔡宜哲,"水蒸氣在不溶性次微米微粒上之非均勻相核凝現象' ,碩士論文,國立成功大學化工系,(1996).

18.黃崇銓,"正丁醇蒸汽在不溶性無機次微米微粒上之非均勻相核凝現' ,碩士論文,國立成功大學化工系,(1989).

19.N. H. Fletcher, “Size effect in heterogeneous nucleation,” J. Chem. Phys., 29, 572(1958).

20.N. H. Fletcher, “The Physics of Rainclouds”,1st Ed., Cambridge University Press, 390 pp. (1969).

21.D. R. Uhlmann and B. Chalmer, “The energetics of nucleation : A symposium on nucleation phenomena,” sponsord by Industrial Engineering Chemistry and American Chemistry Society, Washington DC, June(1965).

22.M. Volmer, “Kinetic der Phasenbildung”, Verlag Th. Steinkoopff, Dresden(1939).

23.C. C. Chen, L. C. Hung, and H. K. Hsu, “Heterogeneous nucleation of water vapor on particles of SiO2, Al2O3, TiO2, and carbon black,” J. Colloid Interface Sci., 157,465 (1993).

24.G. I. Taylor. “Distintegration of water drops in an electric field,” Proc. Roy. Soc. A, 280, 383-397(1964).

25.G. H. Joffre, and M. Cloupeau, “Characteristic forms of electrified menisci emitting charges,” Journal of Electrostatics, 18, 147(1986).

26.G. Joffre, B. Prunet-Foch, S. Berthomme and M. Cloupeau, “Deformation of liquid menisci under the action of an electric field,” Journal of Electrostatics, 13, 151(1982).

27.C. H. Chen, M. H. J. Emond, E. M. Kelder, B. Meester and J. Schoonman, “Electrostatic sol-spray deposition of nanostructured ceramic thin films,” J. Aerosol Sci. 30(7), 959(1999).

28.M. Cloupeau, “Recipes for use of EHD spraying in cone-jet mode and notes on corona discharge effects,” J. Aerosol Sci. 25(6), 1143(1994).

29.S. L. Kaufman, “Electrospray diagnostics performed by using sucrose and proteins in the gas-phase electrophoretic mobility molecular,” Special Issue on Ion Formation Mechanisms in Electrospray, ed. S. Rutan and J. Fenn(1999).

30.K. Okuyama, Y. Kousaka, N. Tohge, “Production of ultrafine oxide aerosol particles by thermal decomposition of metal alkoxide vapors,” AIChE J., 32(23), 2010(1986)

31.Model 3071A Electrostatic Classifier Instruction Manual (part number 1933765) TSI Incorporated(1993).

32.W. C. Hinds, “Aerosol technology”, Jon Wiley and Sons Inc., NY. (1982).

33.Model 3077 Aerosol Neutralizer Instruction Manual (part number 1933077) TSI Incorporated(1992).

34.J. L. Katz, ``Condensation of a supersaturated vapor, I. The homogeneous nucleation of the n-Alkanes,' J. Chem. Phys., 52, 4733 (1970).

35.Model 3025A Ultrafine Condensation Particle Counter Instruction Manual (part number 1933762) TSI Incorporated(1993).
連結至畢業學校之論文網頁點我開啟連結
註: 此連結為研究生畢業學校所提供,不一定有電子全文可供下載,若連結有誤,請點選上方之〝勘誤回報〞功能,我們會盡快修正,謝謝!
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
無相關期刊