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Capturing CO2 from biogas plants
Mälardalen University, School of Business, Society and Engineering, Future Energy Center. (Energy Technology)ORCID iD: 0000-0002-6279-4446
Royal Institute of Technology, Stockholm, Sweden.
SINTEF Energy, Trondheim, Norway.
Vattenfall AB, Stockholm, Sweden.
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(English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102Article in journal (Refereed) In press
Abstract [en]

As a renewable energy, biogas produced from anaerobic digestion and landfill is playing a more and more important role in the energy market. Capturing CO2 from biogas can result in a negative CO2 emission. Depending on how biogas is utilized, there are different routes to capture CO2. A biogas plant that uses raw biogas to produce power and heat can be retrofitted by integrating CO2 capture. In order to identify the best option, three retrofits were compared from both technical and economic perspectives, including SYS-I, which captures CO2 from raw gas and produces biomethane instead of electricity and heat, SYS-II, which captures CO2 using MEA-based chemical absorption after the combustion of raw gas, and SYS-III, which captures CO2 by using oxy-fuel combustion of the raw gas. In general, SYS-I can achieve the highest profit and shortest payback time, mainly due to the high price of biomethane. SYSII and SYS-III are clearly influenced by carbon credit. In order to have positive profits for the retrofits of SYS-II and SYS-III, carbon credit needs to exceed 750SEK (or 100USD)/ton CO2 and 113 SEK (or 15USD)/ton CO2 respectively.

National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:mdh:diva-33717OAI: oai:DiVA.org:mdh-33717DiVA: diva2:1048039
Conference
13th International Conference on Greenhouse Gas Control Technologies, GHGT-13, 14-18 November 2016, Lausanne, Switzerland
Available from: 2016-11-20 Created: 2016-11-20 Last updated: 2017-02-08Bibliographically approved

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