The paper presents the experience of improving the technology for producing commercial carbon dioxide using the example of a real industrial facility. The relevance of the study is determined by the increasing requirements for improving the efficiency of carbon-containing stream utilization, as well as by the need to increase the yield of commercial products while maintaining the stability of the technological process and complying with existing operational constraints. In addition, the rational use of carbon dioxide has become particularly important in the context of the global reduction of greenhouse gas emissions and the development of technologies for CO₂ capture and utilization. The main objective of the work is to increase the yield of commercial carbon dioxide by improving the absorption process. To achieve this objective, two approaches to intensifying the absorption process were proposed: increasing the concentration of monoethanolamine in the absorbent solution and using an absorption promoter that enhances mass transfer efficiency and increases the degree of carbon dioxide removal from the gas mixture. The study of the effect of increasing the monoethanolamine concentration in the absorbent solution and using piperazine as an absorption promoter was carried out by mathematical modeling in the Aspen HYSYS v14.0 software package using the specialized Acid Gas thermodynamic package designed for the calculation of acid gas absorption processes. The modeling made it possible to reproduce the parameters of the operating unit, evaluate the influence of the proposed modifications on the technological scheme, and determine the optimal concentrations of the absorbent solutions. The results demonstrate the potential of using an absorption promoter to improve the efficiency of commercial carbon dioxide production technology without significant modification of existing equipment and with minimal capital costs. The proposed solutions can be used for the modernization of existing gas purification units at chemical industry enterprises.
CARBON DIOXIDE, MONOETHANOLAMINE (MEA), PIPERAZINE, OPTIMIZATION, ABSORBER, CAPTURE, ABSORPTION, PROCESS MODELING
1. United Nations Framework Convention on Climate Change: [website]. – URL: United Nations Framework Convention on Climate Change of May 9, 1992 (pravo.gov.ru) (accessed: 31.08.2023). – Text: electronic.
2. Conventions and Agreements: [website]. – URL: https://www.un.org/ru/documents/decl_conv/conventions/kyoto.shtml (accessed: 31.08.2023). – Text: electronic.
3. United Nations. Measures to Combat Climate Change: [website]. – URL: https://www.un.org/ru/climatechange/parisagreement (accessed: 31.08.2023). – Text: electronic.
4. Decree of the President of the Russian Federation No. 666 dated 04.11.2020. On the Reduction of Greenhouse Gas Emissions: [website]. – URL: http://www.kremlin.ru/acts/bank/45990 (accessed: 31.08.2023). – Text: electronic.
5. Russia Has a Plan to Reduce Greenhouse Gas Emissions by 2050: [website]. – URL: https://ac.gov.ru/news/page/u-rossiipoavilsa-plan-po-snizeniu-vybrosov-parnikovyh-gazov-do-2050-goda-26549 (accessed: 31.08.2023). – Text: electronic.
6. Global Carbon Dioxide (CO₂) Emissions: [website]. – URL: Carbon Dioxide CO₂ Emissions in the World (Carbon Free Zone). (tadviser.ru) (accessed: 31.08.2023). – Text: electronic.
7. CO₂ Emissions from Fuel Combustion: [website]. – URL: https://energystats.enerdata.net/co2/emissions-co2-datafrom-fuel-combustion.html (accessed: 31.08.2023). – Text: electronic.
8. Decarbonization of the Oil and Gas Industry: International Experience and Priorities for Russia [Electronic resource] / ed. by T. Mitrova, I. Gaida // Energy Centre of the Moscow School of Management SKOLKOVO. – 2021. – Access mode: Decarbonization of the Oil and Gas Industry: International Experience and Priorities for Russia (skolkovo.ru), free. – Title from screen.
9. Bazzanella A., Krämer D. Results of the BMBF Funding Measure. Technologies for Sustainability and Climate Protection – Chemical Processes and Use of CO₂ [Electronic resource] // DECHEMA Society for Chemical Engineering and Biotechnology. – 2017. – Seltersdruck & Verlag Lehn GmbH + Co. KG. – Access mode: https://dechema.de/en/energyandclimate/_/CO2_Buch_engl.pdf, free. – Title from screen.
10. U.S. Environmental Protection Agency. Carbon Capture and Sequestration Technologies [Electronic resource]. – Access mode: https://www.epa.gov/carbon-capture-and-sequestration (accessed: 04.03.2026). – Text: electronic.
11. Zhou S. J., Gupta R. P., Rabindran A. V. R. High performance CO₂ capture solvent compositions, and CO₂ capture systems and processes utilizing same: Patent WO2025029534A1; publ. 06.02.2025.
12. Aspen Technology. Aspen HYSYS — Process Simulation Software for Energy and Chemical Industries [Electronic resource]. – Access mode: https://www.aspentech.com/en/products/engineering/aspen-hysys (accessed: 04.03.2026). – Text: electronic.
13. Chemical Engineering World. Process Simulation in Chemical Engineering [Electronic resource]. – Access mode: https://chemicalengineeringworld.com/process-simulationin-chemical-engineering/ (accessed: 04.03.2026). – Text: electronic.
14. International Energy Agency. Carbon Capture, Utilisation and Storage [Electronic resource]. – Access mode: https://www.iea.org/reports/carbon-capture-utilisation-andstorage (accessed: 04.03.2026). – Text: electronic.
15. U.S. Department of Energy. Carbon Capture Research and Development [Electronic resource]. – Access mode: https://www.energy.gov/fecm/carbon-capture-research (accessed: 04.03.2026). – Text: electronic.
16. Global CCS Institute. Post-combustion CO₂ Capture Technologies [Electronic resource]. – Access mode: https://www.globalccsinstitute.com/resources/publicationsreports-research/ (accessed: 04.03.2026). – Text: electronic.
