Abstract
AbstractOne approach of Power‐to‐X is the coupling of the energy and chemical sector, using electrolysis for syngas generation and microbial gas conversion for the production of biochemicals. On the verge of commercialization, known challenges of gas fermentation technology are poor mass transfer of syngas, low cell concentration and productivity. These problems can be addressed by an intelligent reactor design. Thus, this article provides an overview on the current state of the art for reactor technology in syngas fermentation and discusses possible concepts with regard to an application at industrial scale.
Highlights
The reduction of CO2 emissions is a major target of the German and the European Union climate policy
Various mesophilic and thermoyphilic microorganisms are suitable for synthesis gas fermentation processes
Studies focusing on the comparison of reactor types for synthesis gas fermentation were already performed in the early 1990s [27, 30]
Summary
The reduction of CO2 emissions is a major target of the German and the European Union climate policy. Power-to-X technologies aim at converting electrical energy into chemical energy in form of energy carriers and energy-intensive chemical products. These concepts have the potential to reduce the use of fossil raw materials in the energy, transport and chemicals sectors. In cooperation with the Covestro AG, researchers at Siemens AG discovered the potential of a commercially available gas diffusion electrode applied in industrial chlorine-alkaline electrolysis for CO2 electrolysis. This technology enables a high electric current density, which is required for a technical application [2]. This article gives an overview of potential reactor concepts for synthesis gas fermentation and provides a comparison in terms of technical application
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