Study of Trends in System Efficiency for a Biomass Integrated Gasification Fuel Cell Gas Turbine System when Carbon Dioxide Content is Enhanced

The performance of a 30-kW gasifier–SOFC–GT system was evaluated using thermodynamic calculations. Nickel/Gadolinia Doped Ceria (Ni/GDC) anodes were utilized for Solid Oxide Fuel Cells (SOFCs). These systems can achieve high electrical efficiencies of above 50%. The goal of the study is to evaluate trends in system efficiency when carbon...

Numerical Evaluation of Biochar Production Performance of Downdraft Gasifier by Thermodynamic Model

A theoretical evaluation of the biochar production process using a biomass gasifier has been carried out herein. Being distinguished from the previous research trend examining the use of a biomass gasifier, which has been focused on energy efficiency, the present study tries to figure out the effect of biochar production rate on the overall...

Thermodynamic analysis of an improved integrated biomass gasifier solid oxide fuel cell micro combined heat and power system

Limited overall efficiency and excessive complexity can hinder the competitiveness of biomass gasifier solid oxide fuel cell micro combined heat and power systems. To overcome these problems, hydrocarbons direct internal reforming is analysed as a strategy to increase efficiency and reduce system complexity. To the same end, two biosyngas...

Catalytic reforming of acetic acid as main primary tar compound from biomass updraft gasifiers: screening of suitable catalysts and operating conditions

Tar compounds have been defined as Achilles’ heel in biomass gasification. Catalytic reforming solves problems caused by tar by converting them into H₂ and CO. Most of the research has focused on secondary and tertiary tar reforming while some information on primary tar can be derived from bio-oil reforming. However, these studies...

Effect of H₂S and HCl on solid oxide fuel cells fed with simulated biosyngas containing primary tar

Integrated biomass gasifier solid oxide fuel cell systems are an alternative to fossil-fuel-based combined heat and power generators. However, biosyngas contaminants represent a bottleneck for small-scale systems. In this work, we present the results of experiments on the effects of H₂S, HCl, and acetic acid as model primary tar on...

To gasify or not to gasify torrefied wood?: Investigating the effect of torrefaction on oxygen steam blown circulating fluidized bed gasification of wood, focusing on permanent gas and tar composition, and environmental performance

Biomass is a sustainable biofuel as long as it does not compete with food and feed production. Gasification is a versatile technology that produces a gas which can be converted into various high value products. Torrefaction is a technology that converts biomass to a more coal alike product with upgraded properties. As it was confirmed that...

Cross-influence of toluene as tar model compound and HCl on Solid Oxide Fuel Cell anodes in Integrated Biomass Gasifier SOFC Systems

Integrated Biomass Gasifier Solid Oxide Fuel Cell Systems represent an alternative to fossil fuel based power plants, and direct internal tar reforming allows achieving high efficiency and decreasing system complexity. However, at present, tar is removed or reformed externally since there is not yet general agreement on the fate of these...

Comparing Performance of Biomass Gasifier Stoves: Influence of a Multi-Context Approach

Millions of people worldwide die prematurely or suffer from severe health ailments due to cooking equipment that causes unhealthy doses of (household) air pollution. Many attempts to address this have fallen short because technology was not improved sufficiently or the way it was introduced constituted an ill fit with the broader “cooking eco...

Design of a user friendly, safe and efficient biomass gasifier for Vietnamese households

This master thesis describes the process behind the development of a mass producible micro gasification cookstove. The context in which this project was executed in was Vietnam. Starting with an extensive analysis on Vietnamese cooking traditions, different cookstoves in the market and gasifiers that are already being produced worldwide. It is...

Computational Modeling of a Biomass Micro-gasifier Cookstove

The World Health Organization (WHO) states that indoor air pollution resulting from inefficient burning of biomass in traditional cookstoves is a major health hazard affecting around 2.7 billion people globally. With the use of biomass for cooking energy expected to grow in the coming decades, efficient energy conversion technologies are an...

Designing a user-friendly gasification-stove for the rural population in Vietnam

The Master Thesis presents the design of a cook stove that uses biomass such as rice husk to cook. This cook stoves called gasifiers are an alternative to fossil fuel cook stoves in rural areas since the smoke generated by fossil fuels stove comprises a variety of health-damaging pollutants. The gasifier presented in this report was designed...

Tar formation in a steam-O2 blown CFB gasifier and a steam blown PBFB gasifier (BabyHPR): Comparison between different on-line measurement techniques and the off-line SPA sampling and analysis method

Two on-line tar measurement campaigns were carried out using an atmospheric pressure 100 “”kWth steam-O2 blown circulating fluidized bed (CFB) gasifier at the Delft University of Technology (TUD) and a 30–40kWth steam blown pressurized bubbling fluidized bed (PBFB) gasifier BabyHPR (Heatpipe Reformer) at the Technical University Munich (TUM)....

Thomassen Rotating Gasifier