IEA Bioenergy

The IEA Bioenergy is an organisation founded in 1978 by the International Energy Agency (IEA) with the aim of improving international cooperation and the exchange of information on bioenergy research. Members of the IEA Bioenergy working groups are scientists from OECD and non-OECD countries. In accordance with the current research focus areas in the field of bioenergy research, the IEA Bioenergy consists of various working groups (tasks) with work programmes of three years each. The thematic orientation of the working groups is coordinated by a steering committee (ExCo). In the triennium 2022 - 2024, the IEA Bioenergy comprises 11 tasks, in which about 200 people from different international institutes, universities and economic agencies work together. The DBFZ is currently represented with several scientists in five working groups (Tasks) of the IEA Bioenergy. Further information is available at:


March 2021 Webinar Task 44

On Thursday, 18.03.2021 the online event "Flexible Bioenergy in Renewable Energy Systems" with Daniela Thrän and other members of Task 44 took place.
Contents were the presentation of two upcoming reports (Technical options and Expectation and implementation of flexible bioenergy in different countries).
More information and the link to listen can be found on the IEA Bioenergy website.


An IEA Bioenergy Webinar entitled: The contribution of renewable fuels to road transport decarbonisation will be held on Wednesday 17 November 2020 from 16:00 - 17:30. An expert team from IEA Bioenergy TCP and Advanced Motor Fuels TCP, supported by the European Commission, has looked at and assessed the transport sector and its likely development up to 2030 and 2050 for a number of countries, including Germany, Sweden, Finland, USA and Brazil. Dr Franziska Müller-Langer (Head of Biorefineries) also contributed to the results.


Task 40 has published a paper with the collaboration of DBFZ colleagues Malgorzata Borchers, Alena Hahn and Daniela Thrän: "Deployment of BECCS/U value chains. Technological pathways, policy options and business models".

An introduction to the report was given on 16.06.2020 as a web seminar, which can be viewed at the following link:


New publication with DBFZ participation: Country Report: Implementation of bioenergy in Germany –2021 update

New publication as a summary of all reports and supplemented by further statistics: IEA Bioenergy Countries’ Report – update 2021. Implementation of bioenergy in the IEA Bioenergy member countries.

Task 37 (Publication Biogas)

New publication with DBFZ participation: Renewable Gas – discussion on the state of the industry and its future in a decarbonised world


Task 40 is leading the Intertask Project "Deployment of Bio-CCS/CCU Value Chains" and has completed a first set of case studies, focusing on the integration of CCS into centralised biomass-based heat and/or power generation:

  1. biomass based combined heat and power (CHP) - HOFOR Amager CHP, Copenhagen, Denmark.
  2. bioelectricity - Drax Power Station, United Kingdom
  3. waste-to-energy - Fortum Oslo Varme (FOV), Oslo, Norway

Twenty-eight scientists (many of them Task 45 members) from around the world with expertise in forestry, climate and energy systems have contributed to an article addressing the conflicting evidence on the climate impacts of forest bioenergy in order to reduce the confusion created by the publication of divergent studies to inform policy development, business decisions and public debate on bioenergy.

"Applying a science-based systems perspective to dispel misconceptions about climate effects of forest bioenergy "

This open-access article recently published in the journal GCB Bioenergy is freely available at

A report published in June by IEA Bioenergy Task 39 provides a comprehensive analysis of current and potential technologies for the production of sustainable biomass-based aviation fuels.


Publication: Report Task 44 led by DBFZ March 2021:  Expectation and implementation of flexible bioenergy in different countries [Info]

December 2020: Task 39 Report: Comparison of Biofuel Life Cycle Analysis Tools: biochemical 2G ethanol production and distribution


The Bioenergy Newsletter Volume 32 Number 2 published an article about the focus of the working group IEA Bioenergy Task 44 - Flexible Bioenergy and System Integration. Authors are the two leaders of Task 44 Ilkka Hannula and Daniela Thrän.


New publication: Summary report – The Role of Renewable Transport Fuels in Decarbonizing Road Transport

New publication: Comparison of Biofuel Life Cycle Analysis Tools: biochemical 2G ethanol production and distribution


A Task 34 brochure was published in August 2020: Direct Thermochemical Liquefaction of biomass - Characteristics, processes and technologies.

Based on current discussions, the IEA Bioenergy has prepared a short document that presents the most important facts about the use of forest biomass for climate protection.


Since Monday, 20.07.2020 there is a summary and extended report of the workshop "Roles of bioenergy technologies in energy system pathways towards a WB2/SDG world", available which took place on 25.11.2019 in Berlin.

The report and workshop was co-organized by Daniela Thrän. The workshop took place in the context of the Intertask project "The Role of Bioenergy in a WB2/SDG world", in which several tasks of the IEA Bioenergy work together.

Download IEA Bioenergy- Publication

A written version on the topic: "Drivers for Successful and Sustainable Biogas Projects": International Perspectives Report of a symposium held on March 26, 2020 is available from Task 37.​​​​

Change of task leadership at VTT: From January 2021, Daniela Thrän will no longer steer the fortunes of Task 44 with Ilkka Hannula, but together with Elina Mäki.


The Biofuture Platform, a multi-stakeholder initiative from twenty countries to take action against climate change and support sustainable development goals by promoting international coordination of a sustainable low-carbon bio-economy, announced the introduction of a set of voluntary principles.


Task 39 has published a Newsletter May 2020, in which Franziska Müller-Langer (DBFZ), Nicolaus Dahmen (KIT) and Gabriel Costa de Paiva (DBFZ) have written an article worth reading: "Biofuels Production and Consumption in Germany: Status, Advances and Challenges".

National team leader

Task 37 - "Energy from Biogas"

Task 37 is an international working group dealing with the anaerobic digestion (AD) of biomass feedstocks, including agricultural residues (e.g. fertilisers and crop residues), energy crops, organically rich wastewater, the organic fraction of municipal waste (OFMSW) and organic industrial waste. The main interests are the production of biogas for direct use for heat and electricity, the upgrading of biogas to biomethane, the use of biogas/biomethane for electricity grid balancing and high quality digestate that can be used as organic fertiliser. Task 37 deals with the entire biogas production chain, from the collection and pre-treatment of raw materials, through biogas upgrading and the use of bio-fertiliser, to the sustainability of the process chain.

Further information

Dr. Peter Kornatz
Phone: +49 (0)341 2434-716

Task 39 - "Biofuels to Decarbonize Transport"

Task 39 is a group of international experts working on the commercialisation of sustainable biofuels for transport. Bioenergy and biofuels are important components within the green energy portfolio of a country. While there are many renewable energy options for heat and power generation, biofuels are currently the only way to replace liquid fossil fuels such as gasoline, diesel and aviation fuels.

Further information

Dr. Franziska

Phone: +49 (0)341 2434-423

Task 40 - "Deployment of biobased value chains"

The IEA Bioenergy Task 40 (known in the triennium 2016-2018 as "Sustainable biomass markets and international bioenergy trade to support the biobased economy") was established in December 2003 under the Bioenergy Implementing Agreement of the International Energy Agency with the aim of supporting the development of sustainable international markets and international trade in biomass. With the current triennium 2019-2021 this focus has been extended. The focus of Task 40 is on the development and design of efficient and sustainable value chains to support the increased use of biomass for energy, but also for bio-based products, chemicals and materials, taking into account the food and feed markets, in a regional, national and international context. Topics such as bio-economy, new regional bio-energy markets, BECCS/U and renewable gases play an essential role in this context.

Further information

Christiane Hennig
Phone: +49 (0)341 2434-535

Nora Lange
Task 40 Secretary
Phone: +49 (0)341 2434-598

Task 44 - "Flexible Bioenergy and System Integration"

The newly formed Task 44 builds on previous work done in the IEA Bioenergy Task 41 special projects in 2016-17. Although extensive deployment of variable renewable energy (VRE) is an important part of the overall transformation under the energy transition, rapid changes in the energy mix can pose challenges to the resilience of the power grid, especially during periods of weather-related stress. The focus of our work is to develop and analyze bioenergy solutions that can provide flexible resources for a low-carbon energy system. The goal is to improve understanding of the types, quality, and status of flexible bioenergy, and to identify barriers and future development needs in the context of the overall energy system. In doing so, we are investigating the following focus areas: flexible bioenergy concepts to support low-carbon energy systems, accelerating implementation, and system requirements for bioenergy concepts. Likewise, the Task participates in intertask projects and collaborative projects.

Further information


Prof. Dr. Daniela Thrän
Phone: (0)341 2434-435
E-Mail | Profile

Nora Lange
Task 44 Secretary
Tel.: +49 (0)341 2434-598

Task 45 - "Climate and sustainability effects of bioenergy within the broader bioeconomy"

Task 45 is a new working group within the IEA Bioenergy with its first triennium of activities in 2019-2021 with the aim of identifying and addressing critical issues related to climate and other sustainability effects of bioenergy and bio-based products and systems. The goal is to promote the sound development of bioenergy as an integral part of the overall bio-economy.

Further information


Stefan Majer
Phone: (0)341 2434-411