Optimization of Slag Mobility of Biomass Fuels in a Pilot‐scale Entrained‐Flow Gasifier. Issue 7 (21st May 2021)

• Record Type: Journal Article
• Authors: Mielke, Konrad; Wu, Guixuan; Eberhard, Mark; Kolb, Thomas; Müller, Michael
• Is Part Of: Chemical engineering & technology. Volume 44:Issue 7(2021)
• Page Start: 1302
• Page End: 1310
• Publication Date: 2021-05-21
• Subjects: Biomass fuels -- Entrained‐flow gasification -- Oxide melts -- Slag mobility -- Viscosity; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.202000531
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: The bioliq® process, developed at the Karlsruhe Institute for Technology, aims at the production of synthetic fuels and chemicals from biomass. The bioliq® technology is based on a two‐step process with decentral pyrolysis for the production of a transportable slurry from residual biomass and the central entrained‐flow gasification of the slurry by using biomass‐to‐liquid technology. This study is focused on the slag, which is formed by melting the inorganic ash components during gasification. To operate the gasifier smoothly, a range of desired viscosity has to be defined. A structure‐based viscosity model was used to predict the viscosity of the slags at the gasifier outlet. A good agreement between experimental and calculated viscosities is achieved for fully liquid slag systems. Abstract : The slag, which is formed by melting the ash components of a bioslurry during entrained‐flow gasification, is investigated. As a range of desired viscosity of the slag has to be defined for a smooth gasifier operation, the viscosity was determined experimentally and by modeling. The results provide a guideline to optimize the flow behavior of several biomass slags in entrained‐flow gasification.