Science and Education in Karakalpakstan. 2023 №2/1 ISSN 2181-9203 51
external control panel. The high voltage current is fed through the high voltage cable to the input
contacts of the streamer discharge reactor.
The high voltage applied to the reactor electrodes is formed using the following devices: a
nanosecond pulse generator, a power supply unit, a pulse transformer, block of ballast resistors and
voltage regulator. All devices have a protective earth.
The main parameters and dimensions of the laboratory setup are presented in the form of
Table 1.
The proposed mechanism of hydrogen sulfide decomposition under the influence of a
streamer discharge is as follows. The gas stream containing hydrogen sulfide passes through the
reaction chamber, to which high voltage pulses are applied so short duration, so that the breakdown
of the chamber does not occur. In this case, an intense pulsed corona discharge occurs in the
chamber, which is the simultaneous development of a large number of thin luminous discharge
channels - streamers. During the growth of streamers in the interelectrode gap, due to the high
electric field strength, a large number of electrons are produced on the streamer heads, which have
relatively high energy. In the zone of a pulsed nanosecond corona discharge, a strongly
nonequilibrium plasma is formed, in which the ion temperature practically does not differ from the
temperature of the surrounding neutral gas, and the overwhelming majority of the energy received
from the source goes to increase the temperature of the electrons or, what is the same, their energy.
Electrons possessing the necessary energy, in turn, are the main participants in plasma-chemical
reactions leading to gas purification. Interaction these electrons with hydrogen sulfide molecules
leads to the formation of reactive species such as HS
–
and H
+
, which is a prerequisite for
purification.
