Process demonstration isobutene

© Global Bioenergies
© Global Bioenergies

Isobutene is an important petrochemical feedstock. At the Fraunhofer Center for Chemical-Biotechnological Processes CBP in Leuna, the Global Bioenergies S.A. company has built a demonstration plant that for the first time produces isobutene from renewable raw materials instead of petroleum.

Novel fermentative production process

In contrast to petroleum-based production, the novel process uses fermentative production. Various first- and second-generation sugars currently serve as starting materials and are converted into the small but multipotent molecule isobutene by genetically modified microorganisms.

The metabolic pathway from sugars to isobutene was developed by Global Bioenergies S.A. using molecular biology methods. Fermentatively produced isobutene serves as a feedstock for biobased fuel additives, and for various components of cosmetics.

Demonstration plant for scaling up and optimizing the process#

© Global Bioenergies

The demonstration plant with with a nominal capacity of 100 tons per year and a fermentation volume of 5,000 liters was built for the purpose of scaling up and optimizing the process previously developed by Global Bioenergies in the laboratory.

Fraunhofer CBP supported the construction and commissioning of the plant and has been operating the demonstration plant on behalf of the company since 2017.  The scientific evaluation and validation of the process campaigns are carried out in close cooperation between Fraunhofer CBP and Global Bioenergies. In this way, the process is continuously further optimized in terms of process technology.

Directly connected product purification

Unique in Europe is the directly connected product purification for liquefaction of the pure isobutene. Due to the aerobic fermentation process in combination with the highly flammable isobutene, special focus is placed on safety engineering.

In recent years of research, sufficient quantities of isobutene have already been generated to validate further processing and use in biobased fuels as well as cosmetics, and to advance their market readiness.

Privacy warning

With the click on the play button an external video from wwww.youtube.com is loaded and started. Your data is possible transferred and stored to third party. Do not start the video if you disagree. Find more about the youtube privacy statement under the following link: http://www.youtube.com/t/privacy_at_youtube

Official opening of the pilot plant at CBP, Source: Global Bioenergies