Multi-component Secondary Particle Formation and Growth under Low Pressure and Low-Temperature Conditions

2010 Fiscal Year Self-evaluation Report

• Project Area: Impacts of aerosols in East Asia on plants and human health
• Project/Area Number: 20120002
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Complex systems
• Research Institution: Hiroshima University
• Principal Investigator: OKUYAMA Kikuo Hiroshima University, 大学院・工学研究院, 教授 (00101197)
• Project Period (FY): 2008 – 2012
• Keywords: ナノ粒子計測 / 硫酸二次粒子 / イオン誘発核生成 / 均一核生成 / 粒子成長

Research Abstract

本研究の目的は高層大気と類似した条件である低温・減圧下および多成分系での二次粒子生成とその成長過程を明らかにすることであり、下記の3つを研究目的とする。
(1)計測器の開発を行い、常温・常圧下から低温・減圧下におけるSO_2の粒子転換過程を実験的に解明する。
(2)低温・減圧下における二次粒子生成に関して、温度と圧力の与える影響を明らかにするとともに、生物由来の揮発性有機化合物(BVOC)や海塩粒子を模した食塩粒子などの存在下の二次粒子生成に関して室内実験を行い、粒子の生成および成長に与える影響を明らかにする。
(3)エアロゾルの一般動力学方程式を数値計算により解くモデル計算を行い、1)-2)の実験で得られた二次粒子の生成・成長過程を理論的に解明する。

Research Products

• [Journal Article] Measuring the effective density, porosity, and refractive index of carbonaceous particles by tandem aerosol technique (2011)
  • Author(s): Lee, S.Y., Chang, H., Ogi, T., Iskandar, F. Okuyama, K.
  • Journal Title: Carbon in press
  • Peer Reviewed
• [Journal Article] Experimental evaluation of the pressure and temperature dependence of ion-induced nucleation (2010)
  • Author(s): Munir, M.M., Suhendi, A., Ogi T., Iskandar, F. Okuyama, K.
  • Journal Title: J. Chem.Phys. 133 Pages: 124315
  • Peer Reviewed
• [Journal Article] Morphology and particle size distribution controls of droplet-to-macroporous/hollow particles formation in spray drying process of colloidal mixtures precursor (2009)
  • Author(s): Lee, S.Y., Widiyastuti, W., Iskandar, F. Okuyama, K., Gradon, L.
  • Journal Title: Aerosol Sci. Technol. 43 Pages: 1184-1191
  • Peer Reviewed
• [Journal Article] Effect of X-ray energy and ionization time on the charging performance and nanoparticle formation of a soft X-ray photoionization charger (2009)
  • Author(s): Yun, K.M., Lee, S.Y., Iskandar, F., Oku K., Tajima, N.
  • Journal Title: Adv. Powder Technol. 20 Pages: 529-536
  • Peer Reviewed
• [Journal Article] Measurement of the Effective Density of Both Spherical Aggregated and Ordered Porous Aerosol Particles Using Mobilit and Mass-Analyzers (2009)
  • Author(s): Lee, S.Y., Widiyastuti, W., Tajima, N., Iskandar, F., Okuyama, K.
  • Journal Title: Aerosol Sci.Technol. 43 Pages: 136-144
  • Peer Reviewed
• [Presentation] Effect of Ambient Pressure on Generation and Growth of Sulfuric Acid Aerosol (2010)
  • Author(s): Fujimoto, T., Aita, S., Oda, K., Kuga, Y.
  • Organizer: 2010 International Aerosol Conference
  • Place of Presentation: Helsinki, Finland
  • Year and Date: 20100829-20100903
• [Presentation] Condensation particle counter for nanoparticles in diesel exhaust gases (2010)
  • Author(s): Kuromiya, Y., Ito, E., Otani, Y., Seto, T.
  • Organizer: AAAR 29th Annual Conference
  • Place of Presentation: Portland, USA
  • Year and Date: 20100825-20100829
• [Presentation] Optical property Characterization of Aggregated and Porous Carbonaceous Particles by Light Scattering (2010)
  • Author(s): Lee, S.Y., Nandiyanto, A.B.D., Iskandar, F., Okuyama, K.
  • Organizer: AAAR 29th Annual Conference
  • Place of Presentation: Portland, USA
  • Year and Date: 20100825-20100829
• [Presentation] Effective density measurement of spherical aggregate and porous silica particles using tandem mobility-mass analyzers (2009)
  • Author(s): Lee, S.Y., Widiyastuti, W., Tajima, N., Iskandar, F., Okuyama, K
  • Organizer: 18th International Conference Nucleation & Atmospheric Aerosols, Prague
  • Place of Presentation: Czech Republic
  • Year and Date: 20090810-20090814
• [Presentation] Ion generation and bipolar charging characterization by soft X-ray photoionizer (2009)
  • Author(s): Yun, K.M., Lee, S.Y., Iskandar, F, Okuyama, K, Tajima, N
  • Organizer: 18th International Conference Nucleation & Atmospheric Aerosols
  • Place of Presentation: Prague, Czech Republic
  • Year and Date: 20090810-20090814
• [Book] (2008)
  • Author(s): Iskandar.Ferrv, 奥山喜久夫
  • Total Pages: 36-45
  • Publisher: サイエンス&テクノロジー(多孔体の精密制御と機能・物性評価)(分担執筆)