Geology, geography and global energy
Scientific and Technical Journal
Geotechnologies selection of natural gas desulphurisation technology on offshore platforms
2015. №2, pp. 82-87
Andreev Sergey M. - Chief Specialist, Branch of "LUKOIL-INZhINIRING" "VolgogradNIPImorneft", 96 Lenin ave., Volgograd, 400078, Russian Federation
Glebova Lyubov V. - C.Sc. in Geology and Mineralogy Associate Professor, Astrakhan State Technical University, 16 Tatishchev st., Astrakhan, 414056, Russian Federation, lvglebova@mail.ru
Shumovskiy Dmitriy Yu. - Post-graduate student, Astrakhan State Technical University, 16 Tatishchev st., Astrakhan, 414056, Russian Federation, shumovskiyd@gmail.com
The article covers the options of natural gas desulphurisation on offshore platforms for gas containing more than 5 ppm of hydrogen sulphide. This topic of interest is crucial due to the variety of technologies offered by different licensees. Before the selection of the technology it is necessary to determine the processes allowed to be used offshore. The main processes applied offshore are chemisorption process based on chemical interaction; physical absorption, when acid components are extracted due to their solubility in organic sorbents; oxidizing process based on irreversible inversion of absorbed hydrogen sulphide into sulphur; absorption processes based on absorption of gas components by solid sorbents, and membrane technologies. Desulphurisation technology on platform helps to prevent corrosion of the equipment, thus, natural gas desulphurization allows for preservation of pipelines and other metal structures participating in gas treatment and transportation. Besides, gas desulphurization on offshore platforms allows for reduction of gas pipeline construction cost. The factors to be taken into account are the economic feasibility and the ensuring of full natural gas desulphurisation as well as the conditions of the process, its mass-dimensional characteristics. These factors are conditioned by limited space on the platform, terms and conditions of the products delivery in OAO Gazprom and industrial safety rules. The paper provides a review of natural gas desulphurization technologies taking into account the specific character of facilities construction at offshore gas-condendate fields.
Key words: сероочистка, морская платформа, сероводород, природный газ, технология, desulphurisation, offshore platform, hydrogen sulphide, natural gas, technology
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