Research output: Contribution to journal › Article › peer-review
Gas-dynamic kinetics of vapour sampling in the detection of explosives. / Gruznov, Vladimir M.; Vorozhtsov, Alexander B.
In: Molecules, Vol. 24, No. 23, 4409, 03.12.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Gas-dynamic kinetics of vapour sampling in the detection of explosives
AU - Gruznov, Vladimir M.
AU - Vorozhtsov, Alexander B.
N1 - Publisher Copyright: © 2019 by the authors.
PY - 2019/12/3
Y1 - 2019/12/3
N2 - The dynamic sorption concentration of explosive vapours on concentrators made of a metal mesh, and the transportation of explosive vapours through the extended metal channels are considered. The efficiency of the concentration and transportation is determined by the breakthrough of the substance’s molecules through the channels. The research methods we used were breakthrough calculation theory and experiment. When calculating the breakthrough, a mesh was presented as a set of parallel identical channels. Wire mesh and extended channels were made of stainless steel. The breakthrough is determined through the specific frequency of the collisions between the molecules and the channel’s surface. This is presented as a function of the ratio of the substance diffusion flow to the channel’s surface to the airflow through the channel. The conditions for high-speed concentration, complete capture of explosive vapours, and low vapour losses during their transportation through the extended channels were determined theoretically and experimentally. For a concentrator made of a mesh, the condition of a high concentration rate at a high breakthrough (up to 80%) was determined. The described sorption concentration is used in portable gas chromatographic detectors of explosive vapours of the EKHO series.
AB - The dynamic sorption concentration of explosive vapours on concentrators made of a metal mesh, and the transportation of explosive vapours through the extended metal channels are considered. The efficiency of the concentration and transportation is determined by the breakthrough of the substance’s molecules through the channels. The research methods we used were breakthrough calculation theory and experiment. When calculating the breakthrough, a mesh was presented as a set of parallel identical channels. Wire mesh and extended channels were made of stainless steel. The breakthrough is determined through the specific frequency of the collisions between the molecules and the channel’s surface. This is presented as a function of the ratio of the substance diffusion flow to the channel’s surface to the airflow through the channel. The conditions for high-speed concentration, complete capture of explosive vapours, and low vapour losses during their transportation through the extended channels were determined theoretically and experimentally. For a concentrator made of a mesh, the condition of a high concentration rate at a high breakthrough (up to 80%) was determined. The described sorption concentration is used in portable gas chromatographic detectors of explosive vapours of the EKHO series.
KW - Complete vapour capture
KW - Dynamics of sorption concentration
KW - Rapid vapour concentration
KW - Vapour transportation
KW - rapid vapour concentration
KW - vapour transportation
KW - complete vapour capture
KW - dynamics of sorption concentration
UR - http://www.scopus.com/inward/record.url?scp=85076321542&partnerID=8YFLogxK
U2 - 10.3390/molecules24234409
DO - 10.3390/molecules24234409
M3 - Article
C2 - 31816831
AN - SCOPUS:85076321542
VL - 24
JO - Molecules
JF - Molecules
SN - 1420-3049
IS - 23
M1 - 4409
ER -
ID: 22995662