COMPARATIVE ANALYSIS OF THE ENERGY CHARACTERISTICS OF AMINE AND WATER ABSORPTION PROCESSES EXTRACTING CO2 AND H2S FROM BIOGAS
Abstract
Currently in the world we remark wide development of biomethane from biogas production projects and it’s utilization as a universal fuel and engine fuel, it’s supply to the natural gas distribution network. The authors made a comparative assessment of energy costs of biomethane production from biogas, using common amine and waterabsorption processes of carbon dioxide and hydrogen sulfide extraction from biogas. For amine case, extraction of acid components process operating costs consist largely (up to 70–80 %) of the energy expenses for the regeneration of saturated amine, therefore, proposed solution is an effective absorbent — aqueous solution of methyldiethanolamine (MDEA, 40 %) (MDEA, 40 %) and monoethanolamine (IEA, 10 %), usage of which 2,3–2,5 times reduces heat load in the stripper reboiler in comparison with conventional solutions of monoethanolamine (MEA). Comparison of specific energy consumption for production biomethane using an amine and water purification technology of biogas from CO2 and H2S shows that the last has a 20–30 % lower power consumption than the amine. Our studies have shown that under comparable conditions the CO2 concentration at the outlet of the amine desorbing process is in the range of 98 % versus 80 % with water absorption, that indicates a loss of CH4 with gas desorption. Amine absorption gives an output of biomethane on average on 15 % more than water. Using this difference of produced biomethane the additional cost of the regeneration of the rich absorbent is compensated. Furthermore, water absorption requires a significant amount of water, it is connected with environmental concerns and the availability of water resources. In addition, if necessary, during the production of commercial carbon dioxide, the amine process has the advantage of CO2 concentration it is substantially higher at the outlet of the stripper. The comparative analysis of these schemes was conducted using GasCondOil and HYSYS software systems. The results and parameters of the biogas purification process from acid components can be used to calculate the carbon dioxide recovery process and to obtain biomethane — natural gas analogue. Bibl. 17, Fig. 9, Tab. 4.
Downloads
References
Tylim A. A Different Way to Look at Waste: Creating a Source for Renewable Products. — Access mode. — http://www.renewableenergyworld.com, April 13, 2016
Biomassa kak istochnik jenergii, Ed. S.Soufera, O.Zaborski, Moscow : Mir, 1985, 368 p. (Rus.)
Pjatnichko A.I., Bannov V.E. Utilizacija biogaza zakrytyh poligonov TBO, Jekologija pljus, 2009, (4), pp. 12–14. (Rus.)
Ukraina vozobnovila import gaza iz Vengrii, Korrespondent.biz, 5 ijunja 2015 g. — Access mode. — http://korrespondent.net/business/economcs/3523674-ukraynavozobnovyla-ymport-haza-yz-venhryy (Rus.)
Fredric Bauer, Christian Hulteberg, Tobias Persson, Daniel Tamm. Biogas upgrading : Review of commercial technologies / SGC Rapport 2013:270
Mattias Svensson. Biomethane standards. Gas quality standardization of biomethane, going from national to international level, Brussels, 11 March 2014.
— Access mode. — http://www.valorgas.soton.ac.uk/Pub_docs/Delhi_Aug_2013/Biogas%20Vehicle%203/biogas%20upgrading8-13.pdf
Kalashnikov O.V., Budnjak S.V., Ivanov Yu.V. [Engineering Calculating Models of Technologies of Oil and Gas Field Processes. 5. Program System GasCondOil, Jekotehnologii i resursosberezhenie [Ecotechnologies and Resource Saving], 1996, (2), pp. 50–51. (Rus.)
Kalashnikov O.V., Ivanov Ju.V., Budnjak S.V. [Adequacy Issies of Thermophysic Base of Program System HYSYS, PRO-2 and GasCondOil. 1. Hydrocarbon Mixtures], Jekotehnologii i resursosberezhenie [Ecotec hnologies and Resource Saving],1999, (6), pp.13–18.(Rus.)
Kalashnikov O.V., Ivanov Yu.V., Budnjak S.V. [Adequacy Issies of Thermophysic Base of Program System HYSYS, PRO-2 and GasCondOil. 2. Hydrocarbon Mixtures, Water, Metanol and Glikol], Jekotehnologii i resursosberezhenie [Ecotechnology and Resource Saving], 2000, (1), pp. 31–35. (Rus.)
Kalashnikov O.V. Ivanov Yu.V., Onopa L.R. [Adequacy Issies of Thermophysic Base of Program System HYSYS, PRO-2 and GasCondOil. 5. The Problems of Thermodynamics Models of Gas-Liquid Muxtures Choice], Jekotehnologii i resursosberezhenie [Ecotechnology and Resource Saving], 2006, (2), pp. 10–13. (Rus.) 12. — Access mode. — http://dpva.info/guide/guidephysics/solvability/solvabilityofsomegases/
Lavrenchenko G.K., Kopytin A.V. Pjatnichko A.I., Ivanov Yu.V. Optimizacija sostava absorbenta «aminy — voda» uzla izvlechenija SO2 iz dymovyh gazov, Tehnicheskie gazy, 2011, (1), pp. 16–25. (Rus.)
Pjatnichko A.I., Ivanov Ju.V., Zhuk G.V., Onopa L.R. Sravnitel’nyj analiz jeffektivnosti sposobov izvlechenija dioksida ugleroda iz tehnologicheskih gazov, Tehnicheskie gazy, 2014, (4), pp. 58–66. (Rus.)
P’jatnychko O.I., Zhuk G.V., Ivanov Yu.V. Dosvid utylizacii zvalyshhnogo gazu v energetychnyh ustanovkah v Ukrai’ni, Kiev : Agrar Media Group, 2015, 126 p. (Ukr.)
Pjatnichko A.I., Ivanov Yu.V., Zhuk G.V., Onopa L.R. Optimizacija parametrov ustanovki absorbcii /desorbcii dlja proizvodstva biometana iz biogaza, Tehnicheskie gazy, 2015, (2), pp. 58–63. (Rus.)
Pjatnichko A.I., Ivanov Yu.V., Zhuk G.V., Onopa L.R. Optimizacija parametrov tehnologicheskoj shemy aminovoj ochistki biogaza ot SO2 i H2S, Jenergotehnologii i resursosberezhenie [Energy Technologies and Resource Saving], 2015, (1), pp.121–129. (Rus.)
Copyright (c) 2016 Energy Technologies & Resource Saving
This work is licensed under a Creative Commons Attribution 4.0 International License.