Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New mechanism to produce energy from biomass

15.09.2008
Scientists from the Carlos III University of Madrid (UC3M) have developed a system that can improve the efficiency of the conversion process of biomass to fuel gas that will contribute to the production of energy in a more sustainable manner.

One of the challenges that chemical engineers face is placing solid materials in contact with gases to generate certain reactions. One of the options is to use a fluidised bed, consisting of a vertical cylinder with a perforated plate inside where solid particles are introduced using pressurised air.

This way, the solid particles are suspended, and behave much like boiling water. Solids behaving like a liquid depend on the speed of the air stream, making it key to achieving the desired behaviour. With insufficient air, the particles don’t move, but with too much the opposite happens, and they are carried away by the air stream.

Fluidised beds have relevant environmental applications because they allow the gasification of biomass to produce energy. That is, producing fuel gas from crushed biomass which can then be used for energy production. According to one of the authors of the study, Mercedes de Vega from the Energy System Engineering Group of the department of Thermal and Fluid Engineering of the UC3M, using fluidised beds as chemical reactors allows for a more efficient conversion by achieving high mixing degrees and high exchange rates of mass and heat.

This renewable source has great potential in Spain, especially in processes of co-combustion, direct combustion, and gasification. The applications are mainly industrial, open to be used in motors for the production of electricity, in gas turbines, drying processes, as well as in the pharmaceutical industry for the treatment of powder.

Greater efficiency

The study analyses the behaviour of a new bed designed with a rotating base. The base consists of a perforated plate where holes represent just 1% of its total area. The study evaluates the performance of this new design, considering the increase in pressure and the quality of the fluidisation. It also analyses the effect of the rotation speed of the perforated plate on the performance of the fluidised bed. This type of beds can usually present problems such as agglomeration of solid particles and points of high temperature. But one of the most important conclusions determined that the rotating perforated plate reduces these problems by maintaining a very uniform fluidisation.

The researchers now propose, for future investigations, to study different rotation speeds over a hundred revolutions per minute, and to alter the configuration of the holes in the plate. Celia Sobrino, author of the study, states that the new rotating distribution plate produces smaller bubbles inside the fluidised bed and distributes them better, while improving the efficiency of the conversion in gasification applications.

The study ‘Fluidization of Group B particles with a rotating distributor’ carried out by the Energy System Engineering Group of the department of Thermal and Fluid Engineering of the Carlos III University of Madrid has been published in the journal Powder technology.

Oficina de Información Científic | alfa
Further information:
http://www.uc3m.es

Further reports about: Biomass UC3M air stream chemical reactors gas turbines vertical cylinder

More articles from Power and Electrical Engineering:

nachricht ETRI develops eco-friendly color thin-film solar cells
31.07.2020 | National Research Council of Science & Technology

nachricht Silicon Carbide Transistors Improve Efficiency in Home Storage Systems
24.07.2020 | Fraunhofer-Institut für Solare Energiesysteme ISE

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: AI & single-cell genomics

New software predicts cell fate

Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...

Im Focus: TU Graz Researchers synthesize nanoparticles tailored for special applications

“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.

Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...

Im Focus: Tailored light inspired by nature

An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.

Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...

Im Focus: NYUAD astrophysicist investigates the possibility of life below the surface of Mars

  • A rover expected to explore below the surface of Mars in 2022 has the potential to provide more insights
  • The findings published in Scientific Reports, Springer Nature suggests the presence of traces of water on Mars, raising the question of the possibility of a life-supporting environment

Although no life has been detected on the Martian surface, a new study from astrophysicist and research scientist at the Center for Space Science at NYU Abu...

Im Focus: Manipulating non-magnetic atoms in a chromium halide enables tuning of magnetic properties

New approach creates synthetic layered magnets with unprecedented level of control over their magnetic properties

The magnetic properties of a chromium halide can be tuned by manipulating the non-magnetic atoms in the material, a team, led by Boston College researchers,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“Conference on Laser Polishing – LaP 2020”: The final touches for surfaces

23.07.2020 | Event News

Conference radar for cybersecurity

21.07.2020 | Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

 
Latest News

First radio detection of an extrasolar planetary system around a main-sequence star

04.08.2020 | Physics and Astronomy

The art of making tiny holes

04.08.2020 | Physics and Astronomy

Early Mars was covered in ice sheets, not flowing rivers

04.08.2020 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>