Title:
Bio2g - A Full-scale Reference Plant for Production of Bio-Sng (Biomethane) Based on Thermal Gasification of Biomass in Sweden
Author(s):
Fredriksson Möller, B., Ståhl, K., Molin, A.
Document(s):
Paper
Abstract:
E.ON Sverige is planning for a 200 MWgas bioSNG (1,6 TWh/year) plant in southern Sweden based on thermal gasification of forest residues and other biomasses. The project is called Bio2G and has been developed during the past five years. BioSNG (biomethane) is a unique product which has a great potential on all fuel markets. It can be used as a transport fuel, for combined heat & power production, for domestic heating purposes as well as for industrial feedstock. It is fully compatible with natural gas and can be distributed by the same existing infrastructure. A project like Bio2G may even create the security of supply needed for the current natural gas supply which in Sweden is based on a single connection from Denmark. BioSNG may also be produced in liquefied state, LBG, and transported and sold in the same way as Liquefied Natural Gas (LNG).The location of the plant is not finally decided but an Environmental Impact Assessment has been performed for two alternative sites in the harbours of Landskrona and Malmö. The project has developed through prestudies, conceptual studies and finally a preFEED (Front End Engineering and Design) for the plant and is now ready to submit the Environmental Permit application and start the final FEED and procurement phase. Start of operation is targeted to 2018. The time schedule is highly dependent on the market development for renewable transportation fuels that in turn is strongly dependant on political initiatives. In July 2012, the Swedish Government launched a public investigation which will propose the way forward and measures in order to achieve 10% renewable fuels in the Swedish transportation sector by 2020, an independence of fossil transportation fuels by 2030 and the more visionary target to have climate neutral transports by 2050. This work will be reported by the end of this year.The plant is designed for a production of 200 MWgas (1,6 TWh/year) gaseous and liquid bioSNG, 1624 MWe and up to 60 MWheat of district heating. The fuel supply is estimated to 345 MWth biomass, mainly forest residues, which corresponds to about one million tonnes wood chips per year. About 250 000 m2 land will be required for the process plant and the fuel yard and the fuel will be transported by trucks, trains and ships. The fuel will be dried before it is fed in to the pressurized fluidized bed gasifier (10bar/850°C) and converted into a product gas, which is cleaned from particulates and gaseous contaminants. Oxygen/steam will be used as gasification agent in order to minimise the content of nitrogen in the final product and an air separation unit will be included in the plant. The tar content in the gas is reduced in a catalytic reformer and the gas is further conditioned to clean synthesis gas before compression and methanation. Acid gases as H2S and CO2 are removed upstream the methanation and remaining CO2 and water are removed downstream the methanation. Finally, the bioSNG is compressed to the required pressure of the existing natural gas transportation grid. The Bio2G plant will be the first of its kind, a reference plant, and in the future, thermal gasification of lignocellulosic fuels and methanation will offer bioSNG yields in excess of 65%. The preFEED constituting a complete design as well as supporting test activities has been performed in close collaboration between E.ON Gasification Development AB, Carbona OY, Finland, a subsidiary to the Andritz Group and Haldor Topsoe A/S, Denmark.
Keywords:
biogas, catalytic conversion, circulating fluidised bed (CFB), gasification, circulating fluidized bed (CFB), synthetic natural gas (SNG), second generation, gaseous biofuel, alternative fuel vehicle, clean synthesis gas
Topic:
Industrial Demonstration and Business Concepts
Subtopic:
Biofuels for transport
Event:
21st European Biomass Conference and Exhibition
Session:
4AO.5.3
Pages:
1597 - 1600
ISBN:
978-88-89407-53-0
Paper DOI:
10.5071/21stEUBCE2013-4AO.5.3
Price:
FREE
