GPT - Thermo-Chemical Processes Group Instituto Universitario de Investigación en Ingeniería de Aragón. Universidad de Zaragoza
Facilities
Laboratory scale fluid bed gasification plant
This laboratory scale plant has usually been used for gasification experiments of solid materials and wastes (such as sewage sludge, meat and bone meal, switch grass, olive bagasse and several types of coal), operating at atmospheric pressure. It consists of a fluidized bed reactor, heated by an electrical furnace. Before the runs, the solid waste should be prepared to achieve an optimal feeding by a screw. After the pretreatments (by milling and sieved) the raw material can be placed in the feed hopper. This hopper is equipped with the screw feeder, which makes it possible to feed the solid continuously into the reactor.
 
The setup permits to feed different gasifying agents: air, enriched air (air + oxygen) or mixtures of air and steam. These agents could be fed from the bottom of the bed or could be splitted up to pass a part through the screw in order to make the solid feeding easier. Mass flow controllers are used to control the flows of the gasifying agent used. For steam generation, a HPLC pump is used to control the flow of water flowing through a 1/8“ tube coiled around a tubular electric heater.
 
The solid fraction produced during the gasification reactions is removed by overflow in a separated tank. The vapors and gases produced leave the reactor and pass through a cyclone and a hot filter, in which solid particles swept by the gas are collected. Next, gases and vapors go through two ice-cooled condensers, in which water and condensable organic compounds (tar) are collected. A cotton filter is situated after the condensers in order to remove small particulates of water or tar swept by the gas. The volume of the gas produced is measured by a volumetric meter and its composition is analyzed on-line using a micro gas chromatograph, determining the volume percentages of H2, N2, CO, CO2, CH4, C2H4, C2H6, C2H2 and H2S.
 

Tech. Spec.

  • Reactor dimensions: tubular reactor composed by two parts, dense zone with an inner diameter of 40 mm and 400 mm high and freeboard zone, with an inner diameter of 63 mm and 430 high.
  • Setup materials: AISI 310 refractory steel.
  • Gasifying gas inlet: Bronkhorst HI-TEC EL-FLOW® mass flow controller with a maximum capacity of 10 N L/min.
  • 5 kW Electric furnace, with a maximum temperature limit of 900 ºC, controlled by means of two PID controller and K-type thermocouples.
  • Current maximum feeding capacity: 250 g/h of solid.
  • Pressure control system based on two pressure gauges connected to the feeding system and to the bed reactor.
  • Gas analysis: Agilent 3000-A Micro GC equipped with 2 analysis modules using TCD detectors. Modules: Plot U with, He as gas carrier, and MolSieve 5A, with Ar as gas carrier.
  • Computerized data acquisition system.
 

Research projects

 
Coal Catalytic Co-Gasification in an Innovative Rotary Kiln Gasifier (COCACORK, I-OPE-2005/436)

  • Funded by European Comision - Research Fund for Coal and Steel
  • Participants: Centro Sviluppo Materiali (Italy), INETI (Portugal), Sotacarbo (Italy), Enel (Italy), Universidad de Nottingham (Great Britain), Ansaldo Richerce (Italy), Universidad de Zaragoza
  • Period: July 2005 - July 2008
  • Research leader: José Luis Sánchez
  • Total budget: 176.480 €
Observatory of treatment technologies for municipal solid waste with maximum recovery and minimum landfill (OTERSU±). CENIT Programme.

  • Funding organization: subcontract with URBASER S.A.
  • Participants: Universidad de Zaragoza and URBASER S.A.
  • Period: 2006 - 2010.
  • Research leader: Rafael Bilbao
  • Total budget: 790,277 €.
Valorización energética de harinas de origen animal (OTRI-UNIZAR 2007/0358 y 2008/0199).

  • Funded by Gobierno de Aragón and La Caixa.
  • Participants: SIRASA, Gobierno de Aragón and Universidad de Zaragoza
  • Period: July 2007 - July 2009
  • Research leader: Gloria Gea/ Jesús Arauzo
  • Total budget: 135,000 €.
 
 

Publications

Publications in Scientific Journals:
 
  • Cascarosa E., Gasco L., García G., Gea G., Arauzo J. “Meat and Bone Meal and Coal Co-Gasification: Environmental Advantages”. Resources, Conservation and Recycling. 59 (2012) 32-37.
  • Cascarosa E., Gasco L., Sánchez J.L., Gea G., Arauzo J. “Co-gasification of Meat and Bone Meal with Coal in a Fluidized Bed Reactor”. Fuel. 90 (2011) 2798-2807.
 
Publications in International Congresses:
 
  • Gil N., Sánchez J.L., Murillo M.B, Azuara M., Gea G. “Sewage sludge gasification. Effect of the type of gasifying agent” in 19th European Biomass Conference, Berlin (Germany), 2011. ISBN: 978-88-89407-55-7.
  • Cascarosa E., Azuara, M., Gea, G., Arauzo J. “Thermochemical processing of meat and bone meal in a fluidized bed reactor” in 19th European Biomass Conference, Berlin (Germany), 2011. ISBN: 978-88-89407-55-7.
  • Cascarosa E., Gasco, L., García, G., Gea, G., Arauzo J. “Meat and bone meal and coal co-gasification: environmental advantages” in Proceedings of the European Meeting on Chemical Industry and Environment, Mechelen (Belgium), 2010. ISBN: 978-90-81548-60-1.
  • García G., Cascarosa E., Sánchez J.L., Arauzo J. “Analysis of catalytic co-gasification of two types of coal with sewage sludge and olive bagasse” in Proceedings of the 17th European Biomass Conference, Hamburg (Germany), 2009. ISBN: 978-88-89407-57-3.
  • García G., Cascarosa E., Resasco, D., Monzón, A., Arauzo J. “Influence of the stoichiometric ratio on the products obtained by the switchgrass gasification” in Proceedings of the 17th European Biomass Conference, Hamburg (Germany), 2009. ISBN: 978-88-89407-57-3.
  • García G., Ábrego J., Sánchez J.L., Arauzo J. “Influence of feed composition on the co-gasification of two types of coal with sewage sludge and olive bagasse in Proceedings of the 16th European Biomass Conference, Valencia (Spain), 2008. ISBN 978-88-8904758-1.
  • García G., Ábrego J., Sánchez J.L., Arauzo J. “Influence of blend in co-gasification of two types of coal with sewage sludge and olive bagasse” in Proceedings of the 16th European Biomass Conference, Valencia (Spain), 2008. ISBN 978-88-8904758-1.
 
 
European Comission Brisk
The Thermochemical Processes Group (GPT) is partly funded by the EU's European Social Fund and by the Gobierno de Aragón (Aragonese government)
EU's European Social Fund Gobierno de Aragón