Performance Characteristics of an 8 MW(th) Combined Heat and Power Plant Based on Dual Fluidized Bed Steam Gasification of Solid Biomass

The work focuses on a dual fluidized bed gasification technology for which a model has been developed and validated accompanying the operation of the 8 MWth biomass combined heat and power plant in Guessing/Austria. The reactor concept is a circulating fluidized bed system with a large steam-fluidized bubbling bed integrated into the solids return loop. The solids circulation rate is shown versus the riser exit velocity. Further, plant performance maps are presented for both electric and heat power output. The water content of the fuel is a major parameter with respect to plant performance. High fuel water content at high gas engine load means high gas velocities in the riser (erosion limit) and higher heat share in the produced energy

Fischer-Tropsch products from biomass-derived syngas and renewable hydrogen

Global climate change will make it necessary to transform transportation and mobility away from what we know now towards a sustainable, flexible, and dynamic sector. A severe reduction of fossil-based CO2 emissions in all energy-consuming sectors will be necessary to keep global warming below 2 °C above preindustrial levels. Thus, long-distance transportation will have to increase the share of renewable fuel consumed until alternative powertrains are ready to step in. Additionally, it is predicted that the share of renewables in the power generation sector grows worldwide. Thus, the need to store the excess electricity produced by fluctuating renewable sources is going to grow alike. The “Winddiesel” technology enables the integrative use of excess electricity combined with biomass-based fuel production. Surplus electricity can be converted to H2 via electrolysis in a first step. The fluctuating H2 source is combined with biomass-derived CO-rich syngas from gasification of lignocellulosic feedstock. Fischer-Tropsch synthesis converts the syngas to renewable hydrocarbons. This research article summarizes the experiments performed and presents new insights regarding the effects of load changes on the Fischer-Tropsch synthesis. Long-term campaigns were carried out, and performance-indicating parameters such as per-pass CO conversion, product distribution, and productivity were evaluated. The experiments showed that integrating renewable H2 into a biomass-to-liquid Fischer-Tropsch concept could increase the productivity while product distribution remains almost the same. Furthermore, the economic assessment performed indicates good preconditions towards commercialization of the proposed system

PMSAT Inference Algorithm and Publication Artifacts

This repository contains the source code of the implementation used for the PMSAT inference algorithm presented in the paper "It's Not a Feature, It's a Bug: Fault-Tolerant Model Mining from Noisy Data" accepted to the ICSE2024 Conference. It also contains all benchmark sets and their results, as well as the scripts to run/reproduce them, contained in the aforementioned paper. The PMSAT inference algorithm is actively maintained on gitlab.com/felixwallner/pmsat-inferenc

Gaya demonstration project : towards industrialization of an innovative and integrated 2nd generation bioSNG pathway through biomass gasification

International audienceBiomass gasification is a promising way to make renewable energy. It produces a syngas which can be turned into different kinds of energy: CHP (Combined Heat Power), bio-fuel or combined biomethane fuel (or BioSNG: a green Substitute Natural Gas) and heat. Combined Biomethane/heat is environment-friendly (high energetic and chemical yields, local heat valorisation, reasonable biomass supply volume and radius) and is complementary to the other renewable energies [3]. Project "GAYA", started in June 2010, is aiming to develop and prepare industrialization of the combined 2 nd generation biomethane/heat pathway, through a demonstration operation and an R&D pilot plant to be erected in St Fons (France). This demonstrator unit represents a unique experimental tool in Europe in order to allows industrialization of 2G biomethane pathway from 2017 onward. The project objective is to develop an efficient and environmental friendly 2nd generation pathway from biomass to biomethane and injection in natural gas grid. The project has identified optimized configurations of each process blocks. Innovations and improvements will be developed in order to reach the highest energetic efficiency and a better environmental balance in comparison with others 2 nd generations' pathways. 73