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Evaluation and comparison of aqueous ChCl/Urea and other physical absorbents for biogas upgrading process
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University.ORCID iD: 0000-0002-0453-0450
College of Chemical Engineering, Nanjing Tech University, Nanjing .
Key Laboratory of Material and Chemical Engineering, Nanjing Tech University, Nanjing .
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0200-9960
2017 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 142, p. 3631-3636Article in journal (Refereed) Published
Abstract [en]

 Biogas has been considered as an alternative renewable energy, and CO2 removal from raw biogas (i.e. biogas upgrading) is needed for producing biomethane used as vehicle fuels or injected into the natural gas grid. Biogas upgrading using physical absorbents is a simple and efficient technology with low energy requirements for regeneration. In this work, the conceptual process for biogas upgrading using 4 kinds of physical solvents, i.e. water, dimethyl ether of polyethylene glycol (DEPG), propylene carbonate (PC) and aqueous choline chloride (ChCl) /urea (AQDES) was developed and simulated with Aspen Plus. The energy utilization, the amount of recirculated solvent and the diameters of absorber and desorber were analyzed based on equilibrium approach. After that, the rate-based simulation was established to evaluate the specific cost of the process using different solvents. Based on equilibrium approach the comparison between the solvents in respect to the energy utilization for biogas upgrading using different solvents shows the following order: DEPG > water > AQDES > PC, whereas the amount of recirculated solvent and the diameters of absorber and desorber follow another order: water > DEPG > AQDES > PC. The rate-based results show that the process using PC has the lowest total specific cost, followed by AQDES, water and DEPG.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 142, p. 3631-3636
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-67539DOI: 10.1016/j.egypro.2017.12.255Scopus ID: 2-s2.0-85041501091OAI: oai:DiVA.org:ltu-67539DiVA, id: diva2:1180744
Conference
9th International Conference on Applied Energy, Cardiff UK, August 21-24, 2017
Note

Konferensartikel i tidskrift

Available from: 2018-02-06 Created: 2018-02-06 Last updated: 2018-05-03Bibliographically approved

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