Abstract
In many processes proposed for biorefineries, recycling procedures, and industrial or agricultural production processes, residue is generated which could be further transformed by thermochemical conversion via gasification. The technology of dual fluidized bed steam gasification is capable of producing a valuable product gas out of such residue. The generated nitrogen-free product gas can be used for heat and power production and is suitable for separating gases (e.g. hydrogen). However, if the product gas is cleaned, its use as syngas is more beneficial for manufacturing renewable chemical substances, like synthetic natural gas, methanol, Fischer–Tropsch liquids, or mixed alcohols. This paper presents the results of experimental research from gasification test runs of different biogenic fuels, carried out with an advanced 100 kW pilot plant over the last 5 years at TU Wien. The focus is to provide an overview of measured results validated by mass and energy balances and to present key calculated performance indicating key figures of the test runs. In this way, the influence of various operational parameters and the composition of the product gas are evaluated. The presented results form the basis for the proper design of suitable gas-cleaning equipment. Subsequently, the clean syngas is available for several synthesis applications in future biorefineries.
Highlights
Gasification processes to convert solid fuels like coal and peat into a burnable gas mixture have been in use since the 1810s
The product gas quality is influenced in a positive way, because the upstreaming tar-rich product gas from the lower gasification reactor (GR) passes zones of solids like bed material, ash particles, and unconverted char
The combination of increased temperature with catalytically active solids leads to an increased conversion of formerly unconverted and unwanted product gas components like fly char, higher gaseous hydrocarbons, and tar [24]
Summary
Gasification processes to convert solid fuels like coal and peat into a burnable gas mixture have been in use since the 1810s. The DFB steam gasification process using a former classic test plant with 100 kW fuel power according to Figure 1 was intensively investigated from 1998 to 2013 for lignocellulosic biomass at TU Wien [6,7,8,9]. Possible alternative and cheaper fuels are biogenic residues or waste from agriculture, industry, and municipalities like sewage sludge These are inexpensive materials or have negative prices, but the gasification and gas cleaning are very complex and challenging. In this new DFB pilot plant, other gases like CO2 or gas mixtures of CO2 and steam are applied as gasification agents. & fuel type, & bed material type, & gasification agent, & temperature, and & steam-to-carbon ratio, which aim for improved product gas quality, low tar content, and relevant key performance indicators regarding optimized process operation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
