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Ion-induced nucleation rate measurement in SO2/H 2O/N2 gas mixture by soft X-ray ionization at various pressures and temperatures
Munir M.M.a, Suhendi A.b, Ogi T.b, Iskandar F.a, Okuyama K.a
a Department of Physics, Institut Teknologi Bandung, Indonesia
b Department of Chemical Engineering, Hiroshima University, Japan
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]This paper reports the systematic investigation of ion-induced nucleation rate measurement in a SO2/H2O/N2 gas mixture, employing soft X-ray at different pressure and temperature levels. Experiments were conducted using a modified continuous flow gas-generation system employing a soft X-ray ionizer and a particle counter, with an improved integrated online temperature, pressure and a relative humidity (RH) control system. Nucleation rates were measured as a function of SO2 concentration at different levels of RH, pressure (600-970 hPa) and temperature (5-25 °C). The results show that the nucleation rate dependence on SO2 concentration followed a power law, and the slope varied slightly in a range from 1 to 1.26 at different RH levels (15-60%). A positive pressure effect was generally found and a power law was followed with varied scaling for different SO2 concentrations. The trend of an increase in nucleation rate with temperature was consistent with observations in homogenous nucleation experiments, and with the behavior predicted by classical binary nucleation theory. These experimental results will be useful to explain the contribution of ion-induced nucleation in different locations and atmospheric conditions. © 2012 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Aerosol measurement,Atmospheric conditions,Binary nucleation,Continuous flows,Environment,Homogenous nucleation,Ion-induced nucleation,Nucleation rate,Particle formations,Positive pressure,Pressure and temperature,Soft X-ray,Soft x-ray ionization,Systematic investigations[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Aerosol measurement,Atmospheric aerosol,Environment,Nucleation,Particle formation[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]This research was supported by a Grant-in-Aid for Scientific Research on Innovative Areas 4003 ‘‘Impact of aerosols in east Asia on plants and human health” from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan (No. 20120002 ) and Grant-in-Aids for JSPS Fellow ( 2109301 ) from the Japan Society for the Promotion of Science (JSPS). JSPS is acknowledged for providing a JSPS Postdoctoral Fellowship (M.M.M). MEXT is acknowledged for providing doctoral scholarships for A.S.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.apt.2012.04.002[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]