ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
52
ADSORPTION METHODS OF CLEANING, DRYING AND
DEBENZINIZING NATURAL GASES
Makhmudov M.J
.
Yomgurov S.A.
Bukhara State Technical University
https://doi.org/10.5281/zenodo.15333027
The reliability of operation of gas transportation systems (GTS), of which
gas preparation units for transportation (UPGT) are an integral part, puts
forward certain requirements for the quality of the transported gas. The main
ones are the dew point for moisture and hydrocarbons.
In addition to methane, natural gas also contains heavier hydrocarbons (C
2
-
C
7+
), water vapor and methanol. Sometimes inert gases, nitrogen (N
2
) and
carbon dioxide (CO
2
) are present, as well as sulfur-containing components such
as H
2
S, organic sulfur compounds and small amounts of mercury and
radioisotopes. When natural gas is supplied without prior purification, liquids
may form in the gas transportation system. Hydrocarbons in the presence of
water can form hydrates, which can clog valves and pipelines, and sometimes
lead to emergency shutdowns. It is known that hydrates are the main cause of
blockages in transportation systems [1].
The problems of drying natural gas with various adsorbents are considered
in a number of publications, in particular, in works [2].
The feasibility of using one or another method of adsorption drying and
purification of natural gas depends on many factors and is determined by the
productivity of the plant, the composition of the gas, the concentration of
hydrocarbons Cs+, sulfur compounds and other impurities, and the consumer's
requirements for purified gas.
-
When solving specific practical problems related to gas purification and
drying-stripping, it is necessary to take into account the main advantages of one
or another adsorbent, such as [3-4]:
- ability to provide purification from all unwanted components in one
system;
- providing deep gas drying;
- ease of operation and automation capability.
The adsorption process of drying hydrocarbon gases is widely used in gas
processing plants as the first stage of low-temperature technology, the final
products of which are liquefied gases such as propane, butane, liquid nitrogen
and helium [1].
There is an opinion that the adsorption process of preparing gas for
ACADEMIC RESEARCH IN MODERN SCIENCE
International scientific-online conference
53
processing is metal-intensive and expensive compared to, for example, the
absorption process, which is widely used in fields. However, a higher degree of
moisture extraction from gas and the absence of absorbent vapors in the dried
gas, which can condense in the piping and apparatus during the gas cooling
process (not to mention entrainment), make this process reliable, stimulate its
improvement and wide application in industrial gas processing.
As for the industrial preparation of gas for transportation through main gas
pipelines, the main criterion for choosing a preparation method is the dew point
of the gas for moisture and hydrocarbons, which eliminates their condensation
and precipitation in gas pipelines [1, 3].
The main adsorbents used for cleaning and drying-stripping of natural
gases in industry are [4]:
- active carbons;
- zeolites;
- active aluminum oxide;
- silica gels.
On their basis, a number of technologies for cleaning, drying and stripping
of natural gas have been developed and introduced into industry.
Literature:
1. Махмудов М. Ж. Определение адсорбционной ёмкости синтетического
цеолита NaX в динамических условиях по ароматическим углеводородам
низкооктанового бензина //Нефтепереработка и нефтехимия. Научно-
технические достижения и передовой опыт. – 2020. – №. 7. – С. 13-16.
2. Махмудов М. Ж., Нарметова Г. Р. ИССЛЕДОВАНИЕ СОРБЦИОННОЙ
ЕМКОСТИ
СИНТЕТИЧЕСКОГО
ЦЕОЛИТА
NAX
ПО
БЕНЗОЛУ
В
ДИНАМИЧЕСКИХ
УСЛОВИЯХ
ИЗ
ЖИДКОЙ
ФАЗЫ
//НЕФТЕГАЗОПЕРЕРАБОТКА-2016. – 2016. – С. 112-113.
3. Махмудов М. Ж., Нарметова Г. Р. Исследование синтетического цеолита
NaX для адсорбционной деароматизации автобензина с целью доведения
его до норм Евро-5 //Мир нефтепродуктов. Вестник нефтяных компаний. –
2016. – №. 9. – С. 18-22.
4. Махмудов М. Ж. Определение сорбционной емкости синтетического
цеолита NaX в динамических условиях из жидкой фазы по ароматическим
углеводородам бензина //Защита окружающей среды в нефтегазовом
комплексе. – 2020. – №. 5. – С. 26-29.
