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Converting waste plastics into gas


Until now, plastics such as PVC have created problems during waste treatment. Although they have a high calorific value, their combustion produces harmful compounds that can escape into the environment. The BINE-Projektinfo brochure "Generating syngas from plastic wastes" (05/2016) presents a new gasification process for this waste fraction. In this process, waste plastics, carbon-containing sorting residues and rubber parts as well as shredded materials from the automotive sector are treated in a shaft kiln. Here lime plays a decisive role.

New method utilises carbon-containing sorting residues and waste

View of the Ecoloop large scale pilot plant. In this shaft kiln plant, 50,000 tons of waste plastic can be processed per year.

© Ecoloop GmbH

With this method, the residual materials are mixed with coarse-ground lime and, using the counter flow principle, converted thermally and chemically in several stages, including gasification and pyrolysis.

The lime is used as a carrier medium for the plastics, as a catalyst for the process and as a binder for pollutants. No flue gas emissions are produced during the conversion.

The method is also suitable for problematic waste such as chlorine-containing plastics, contaminated soils and plastic-containing electrical scrap. Lime binds not only halogens and other harmful substances but also valuable materials contained in waste materials such as metals from electrical scrap.

These can later be separated and recycled. The new procedure is designed to supplement existing waste treatment systems.

The process produces a purified synthesis gas that can be utilised materially for producing basic chemical products or in engines. The first large-scale plant can recycle up to 50,000 tonnes of waste plastic per year. Ecoloop GmbH in Bad Harzburg, Germany, has developed the Ecoloop method in collaboration with other partners.

You found all informations about the BINE Projektinfo brochure entitled "Generating syngas from plastic wastes" (05/2016) here:

Uwe Milles/Birgit Schneider

About BINE Information Service

Energy research for practical applications

The BINE Information Service reports on energy research topics, such as new materials, systems and components, as well as innovative concepts and methods. The knowledge gained is incorporated into the implementation of new technologies in practice, because first-rate information provides a basis for pioneering decisions, whether in the planning of energy-optimised buildings, increasing the efficiency of industrial processes, or integrating renewable energy sources into existing systems.

About FIZ Karlsruhe

FIZ Karlsruhe – Leibniz Institute for Information Infrastructure is a not-for-profit organization with the public mission to make sci-tech information from all over the world publicly available and to provide related services in order to support the national and international transfer of knowledge and the promotion of innovation.
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FIZ Karlsruhe is a member of the Leibniz Association (WGL) which consists of 87 German research and infrastructure institutions.

Weitere Informationen: - BINE Informationsdienst

Rüdiger Mack | idw - Informationsdienst Wissenschaft

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