Russian Journal of Applied Chemistry, 2013, Vol. 86, No. 12, pp. 1854−1861.
Pleiades Publishing, Ltd., 2013.
Original Russian Text © M.M. Trubyanov, G.M. Mochalov, V.M. Vorotyntsev, S.S. Suvorov, 2013, published in Zhurnal Prikladnoi Khimii, 2013, Vol. 86,
No. 12, pp. 1906−1913.
Intensiﬁ cation of the Mass Transfer Performance
in Packed Columns for High-Purity Liquiﬁ ed Gases Distillation
under Elevated Pressure
M. M. Trubyanov
, G. M. Mochalov
, V. M. Vorotyntsev
, and S. S. Suvorov
Nizhni Novgorod State Technical University, Nizhni Novgorod, Russia
HORST ﬁ rm LLC, Moscow, Russia
Received October 3, 2013
Abstract—An effect of a simultaneous increase in pressure, temperature, and loading density on the efﬁ ciency of
mass transfer in a packed distillation column was experimentally and theoretically examined in deep puriﬁ cation
of liqueﬁ ed gases. It was found and experimentally conﬁ rmed that the increase in pressure and temperature in the
column enables intensifying mass transfer, as well as improving performance and lowering energy consumption
of the purifying process.
Currently technologies for separation and puriﬁ cation
of gases play a huge role in science and engineering .
At the present stage of development of technologies for
producing high-purity materials in micro-, opto-, and
nanoelectronics a range of impurities of limited type
was signiﬁ cantly expanded and the required levels of
purity were increased. Thus, it should be developed new
physical and chemical approaches, which are focused on
improving the efﬁ ciency of separation technologies. At
the same time no less attention is paid to improving the
performance and reducing energy consumption for the
implementation of deep puriﬁ cation.
The high pressure distillation is one of the versions
of implementation of these this approaches, which is in-
creasingly used for the separation of mixtures of liqueﬁ ed
gases, their deep puriﬁ cation, as well as for concentra-
tion of isotopes [2–5]. Deep puriﬁ cation of a number of
hydrides and inert gases by distillation at atmospheric
pressure is carried out using liquid nitrogen as a refrig-
erant that results in the high energy consumption of this
technology. Increased pressure in the distillation column
allows raising the temperature of the process, abandon-
ning cryogenic cooling agents, and substantial reducing
the energy consumption for rectiﬁ cation [6, 7]. At the
same time with increasing the temperature speciﬁ c heat
of evaporation decreases that reduces the energy con-
sumption for a phase transition from liquid to vapor and
contributes to further reduction of energy consumption
of puriﬁ cation technologies.
The fact is no less important that with increasing pres-
sure in the column a throughput of a packing increases and
a range of loads, when a stable ﬁ lm character of contact
between the liquid and vapor is maintained, is extended
[6, 7]. Due to this the rise in pressure and temperature in
the column enables improving its productivity.
To date the question of the effect of high pressure and
temperature on the efﬁ ciency of mass transfer in packed
distillation columns used for deep puriﬁ cation of volatile
substances remains one of the least studied. Vorotyntsev
et al.  demonstrated among the ﬁ rsts substantial dif-
ferences in the behavior of packed columns operating
at elevated pressure. The efﬁ ciency of deep puriﬁ cation
of a number of volatile inorganic hydrides was exam-
ined in columns with random packing at high pressures
(1–20) × 10
Pa . The possibility of effective separa-