Project meeting of STEP at the site of the company ATS - Agro Trading & Solutions in Hardegsen (Photo: DBFZ)

Biogas Biomethane strategy Strategy development Biofuels

Project ID 03KB098

SuRIOx - Sulfur Removal with IronOxid

Adsorbing foam (Source: Fraunhofer IKTS)


  • 01.11.2014 – 30.06.2018


Fraunhofer Institute for Ceramic Technologies and Systems IKTS
Biomass Technologies and Membrane Process Engineering
Winterbergstraße 28
01277 Dresden

Fraunhofer Institute for Ceramic Technologies and Systems (IKTS)
Winterbergstraße 28, 01277 Dresden, Germany

Marc Lincke – project manager
Telephone: +49 (0)351 2553-7766

Dr. Burkhardt Faßauer – direct contact person
Telephone: +49 (0)351 2553-7667

Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM-DD)
Winterbergstraße 28, 01277 Dresden, Germany

Gunnar Walther – direct contact person
Telephone: +49 (0)351-2537-340

Dr. Uwe Gaitzsch – further contact person
Telephone: +49 (0)351-2537-430

Dr. Almut Wiltner – further contact person
Telephone: +49 (0)351-2537-392


03KB098B - Alantum Europe GmbH


03KB098C - Emission Partner GmbH & Co. KG


03KB098E - GICON Großmann Ingenieur Consult GmbH

Associated partners

Cooperation partners



Scientific paper: 

Lincke M, Petasch U, Gaitzsch U, Tillmann A, Tietze M, Niebling F (2020): Chemoadsorption for Separation of Hydrogen Sulfide from Biogas with Iron Hydroxide and Sulfur Recovery. DOI:


Due to the changing tasks of the energy carrier biogas that is currently providing base load for on-site power generation and / or the provision of control energy, the production of biomethane gains an ever greater significance in the natural gas network. In particular, the preparation process for H2S removal and CO2 separation must be improved economically and environmentally. Consequently, the method of sulfur removal is a key technology in the purification of biogas.
The project aims of SuRIOx is the procedural development and testing of novel desulfurization system, for which in the context of the completed joint project FKZ: 03KB041 the material development and the function was verified. Under the proposed project SuRIOx the main aim in the determination of process parameters and process development for the individual steps biogas desulfurisation, in situ reactivation and the ex-situ regeneration with sulfur recovery. Compared to the existing desulfurization (e. g. active carbon), the method used in SuRIOx comprises several economic and environmental advantages, such as the recovery of sulfur, low disposal costs and no air entry into the biogas. The expectation is, that after a long life cycle no longer operational adsorber foams be recycled, the recovered sulfur can be marketed as basic chemical. This leads to lower life cycle costs compared with other desulfurization processes.


The project SuRIOx is to achieve the ambitious goal of providing biomethane more efficient regarding energy and resources in comparison with the state of the art. An efficient biogas desulfurization is absolutely necessary for the further expansion of the field. Through the use of novel desulfurization both economically and ecologically incentives can be created in the natural gas network for a further increase in the proportion of biomethane. The following table lists the environmental and economic objectives of the joint project.



The main focus of IFAM-DD will be in the field of material development and coating technology. There will be a transfer of the results from the laboratory scale to the small scale. Especially for the coating and the calcination procedure need to be developed transferable parameters. Furthermore at the IFAM-DD occurs the evaluation of the adsorbent material in terms of degradation and material analysis.


The focal point of Fraunhofer IKTS is in the development and testing of the individual process steps in biogas desulfurization, in-situ reactivation and ex-situ regeneration with sulfur recovery. The process steps are tested in the laboratory and pilot plant scale.


The foci of Alantum are in the areas of the upscaling the coating technology, the development of flow and surface optimized adsorber geometries as well as the production of the needed support foams within the project.


The focus of Emission Partner will be both to scale up and further develop the coating technology and calcination procedure and the provision of coated adsorbent foam for the tests at laboratory and pilot scale.


The focal point of Lehmann-UMT is in the reactor design, the development and construction of the experimental system for biogas desulfurization and in the testing of the experimental system on a large scale Biogas plant in a separate stream.


The foci of GICON are to develop a pilot plant system and testing this in the pilot biogas plant at the site in Cottbus. The aims of this research are cyclic testing with real biogas, to demonstrate the long term stability, verification of process parameters and to assess the cost effectiveness.



  • Biogas fine desulfurization; H2S < 5 mg / m³ (to be tested in IKTS)
  • Development and production of adsorber structure
  • Development and up-scaling of the coating technology and calcination procedure
  • Metallographic characterization and XRD analysis of coated and calcinated foams
  • Material analysis on adsorber after use and the sulfur recovery to a detailed understanding of the process
  • Evaluation of possible degradation of used adsorber structures


  • Laboratory performance tests for biogas desulfurization for investigation or evaluation process parameter
  • Laboratory tests for thermal regeneration and sulfur recovery
  • Derivation of process parameters for the design of small technical system
  • Integration of small-scale system into existing biogas plants to perform long-term studies
  • System optimization and systematic identification of process parameters


  • Development of flow and surface optimized adsorber geometries
  • Production support foams


  • Design Reactor
  • Conceptual Engineering and System
  • Build system at small scale
  • Integration in a Biogas plant (bypass)
  • Performing long-term studies
  • System optimization and systematic identification of process parameters
  • Evaluation economy
  • Create a marketing concept


  • System development test facility
  • Conceptual process engineering and system design
  • Development of safety concept
  • Integration of the test system in the pilot biogas plant
  • Performing long term studies 
  • System optimization and systematic determination of process parameters
  • Economic evaluation 
  • Create a marketing concept


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