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Three innovative methanation technologies

Three innovative methanation technologies. Workshop for the promotion of biomethane in Denmark Agro Food Park 12 S eptember 2013 Anders Peter S. Adamsen. Background. Fluctuating production of electricity from wind turbines Excess or inexpensive electricity requires solutions

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Three innovative methanation technologies

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  1. Three innovative methanation technologies Workshop for the promotion of biomethane in Denmark Agro Food Park 12 September 2013 Anders Peter S. Adamsen

  2. THREE METHANATION TECHNOLOGIES Background Fluctuating production of electricity from wind turbines Excess or inexpensive electricity requires solutions Difficult to store electricity Easy to store and transport methane where access to natural gas grid The solution Excess electricity can be converted to methane by methanation of carbon dioxide, e.g. in biogas

  3. THREE METHANATION TECHNOLOGIES Energinet.dk’s vision for fossil fuel freeDenmark in 2050 – The Wind Scenario

  4. THREE METHANATION TECHNOLOGIES HaldorTopsøe’schemical methanation process

  5. THREE METHANATION TECHNOLOGIES Fuel Cell and Electrolyser

  6. THREE METHANATION TECHNOLOGIES Synergy between SOEC and fuel synthesis

  7. THREE METHANATION TECHNOLOGIES Biogas to SNG via SOEC and methanation of the CO2 in the biogas

  8. THREE METHANATION TECHNOLOGIES Gasclean up for sulfurand other impurities in the biogas Test for > 800 hours at Aarhus University, Foulum have shownsulfurremoval to be~100%

  9. THREE METHANATION TECHNOLOGIES

  10. THREE METHANATION TECHNOLOGIES Biological methanation of biogas – the Electrochaea process Consortium: • Electrochaea.dk ApS • E.ON. • NordjyskElhandel AS • Aarhus University Key numbers: • Period: Jan. 2012 – Dec. 2013 • Support from EUDP: 6.6 million DKK • Total budget: ~12 million DKK • 250 kW as methane • Demonstration over 3,000 hours under realistic market conditions for electricity and gas

  11. THREE METHANATION TECHNOLOGIES Power-to-Gas Overview

  12. THREE METHANATION TECHNOLOGIES Electrochaea: technlogy basic: • Converting Power to Biomethane Using Biological Catalyst

  13. THREE METHANATION TECHNOLOGIES Electrochaea Process Flow Steps

  14. THREE METHANATION TECHNOLOGIES Electrochaea’s Biocatalyst • Methanogenicarchaea, a single-celled microorganism • Anaerobic extremophiles • Selectively evolved, not genetically modified • Oxygen tolerance • Mass conversion efficiency • Reaction kinetics

  15. THREE METHANATION TECHNOLOGIES Electrochaea’sBiocatalyst: properties

  16. THREE METHANATION TECHNOLOGIES Direct addition of hydrogen to biogas or the biogas broth – the DTU process Developed by Gang Luo, Postdoc, and IriniAngelidaki, Professor The principle: • CO2 together with H2 could be used by hydrogenotrophic methanogens for methane production • 4H2+CO2=CH4+2H2O • In Denmark, H2 could be obtained by electrolysis of water using the surplus electricity from wind mills

  17. THREE METHANATION TECHNOLOGIES DTU’s upgrading concepts DTU has developed both ex-situ and in-situ biogas upgrading technologies which are patented: • Direct injection in a biogas reactor (in-situ upgrading). Important points for efficient upgrading in in situ upgrading system • Co-digestion with acidic wastes to keep pH to below 8.0 • Distribution of H2 through hollow fibre membranes • Injection of H2 to a gas flow biogas reactor • Separate treatment of biogas in a separate biogas reactor (ex-situ upgrading)

  18. THREE METHANATION TECHNOLOGIES Concept 1: In-situ biogas upgrading Very simple process for biogas upgrading

  19. THREE METHANATION TECHNOLOGIES Concept 2: ex-situ biogas upgrading An alternative method which does not affect the anaerobic process in the biogas reactor

  20. THREE METHANATION TECHNOLOGIES Status on the DTU concept • Currently, CH4 content of 98-99% in the biogas is achieved by both technologies in the lab. • The technologies are ready for up-scaling.

  21. THREE METHANATION TECHNOLOGIES The challenges The ongoing demonstrations will provide important information on: • Need of gas cleaning – sulfur gasses etc. (HaldorTopsøe) • Ramp up and ramp down time • Robustness • System integration • Maturity level • CAPEX • OPEX

  22. THREE METHANATION TECHNOLOGIES Acknowledgement • HaldorTopsøe: John Bøgild Hansen • Electrochaea: Jeff Fornero • DTU, BioEnergy Research Group: Gang Luo & IriniAngelidaki

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